{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2026-34001","assignerOrgId":"53f830b8-0a3f-465b-8143-3b8a9948e749","state":"PUBLISHED","assignerShortName":"redhat","dateReserved":"2026-03-25T04:53:13.615Z","datePublished":"2026-04-23T14:54:00.333Z","dateUpdated":"2026-07-15T01:04:53.429Z"},"containers":{"cna":{"title":"Xorg: xwayland: x.org x server: use-after-free vulnerability leads to server crash and potential memory corruption","metrics":[{"other":{"content":{"value":"Important","namespace":"https://access.redhat.com/security/updates/classification/"},"type":"Red Hat severity rating"}},{"cvssV3_1":{"attackComplexity":"LOW","attackVector":"LOCAL","availabilityImpact":"HIGH","baseScore":7.8,"baseSeverity":"HIGH","confidentialityImpact":"HIGH","integrityImpact":"HIGH","privilegesRequired":"LOW","scope":"UNCHANGED","userInteraction":"NONE","vectorString":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H","version":"3.1"},"format":"CVSS"}],"descriptions":[{"lang":"en","value":"A flaw was found in the X.Org X server. This use-after-free vulnerability occurs in the XSYNC fence triggering logic, specifically within the miSyncTriggerFence() function. An attacker with access to the X11 server can exploit this without user interaction, leading to a server crash and potentially enabling memory corruption. This could result in a denial of service or further compromise of the system."}],"affected":[{"vendor":"Red Hat","product":"Red Hat Enterprise Linux 10","collectionURL":"https://access.redhat.com/downloads/content/package-browser/","packageName":"xorg-x11-server-Xwayland","defaultStatus":"affected","versions":[{"version":"0:24.1.5-6.el10_1","lessThan":"*","versionType":"rpm","status":"unaffected"}],"cpes":["cpe:/o:redhat:enterprise_linux:10.1"]},{"vendor":"Red Hat","product":"Red Hat Enterprise Linux 10","collectionURL":"https://access.redhat.com/downloads/content/package-browser/","packageName":"xorg-x11-server-Xwayland","defaultStatus":"affected","versions":[{"version":"0:24.1.9-4.el10_2","lessThan":"*","versionType":"rpm","status":"unaffected"}],"cpes":["cpe:/o:redhat:enterprise_linux:10.2"]},{"vendor":"Red Hat","product":"Red Hat Enterprise Linux 10.0 Extended Update Support","collectionURL":"https://access.redhat.com/downloads/content/package-browser/","packageName":"xorg-x11-server-Xwayland","defaultStatus":"affected","versions":[{"version":"0:24.1.5-6.el10_0","lessThan":"*","versionType":"rpm","status":"unaffected"}],"cpes":["cpe:/o:redhat:enterprise_linux_eus:10.0"]},{"vendor":"Red Hat","product":"Red Hat Enterprise Linux 6 Extended Lifecycle Support  - EXTENSION","collectionURL":"https://access.redhat.com/downloads/content/package-browser/","packageName":"tigervnc","defaultStatus":"affected","versions":[{"version":"0:1.1.0-25.el6_10.16","lessThan":"*","versionType":"rpm","status":"unaffected"}],"cpes":["cpe:/o:redhat:rhel_els:6"]},{"vendor":"Red Hat","product":"Red Hat Enterprise Linux 7 Extended Lifecycle Support","collectionURL":"https://access.redhat.com/downloads/content/package-browser/","packageName":"xorg-x11-server","defaultStatus":"affected","versions":[{"version":"0:1.20.4-34.el7_9","lessThan":"*","versionType":"rpm","status":"unaffected"}],"cpes":["cpe:/o:redhat:rhel_els:7"]},{"vendor":"Red Hat","product":"Red Hat Enterprise Linux 7 Extended Lifecycle Support","collectionURL":"https://access.redhat.com/downloads/content/package-browser/","packageName":"tigervnc","defaultStatus":"affected","versions":[{"version":"0:1.8.0-36.el7_9.4","lessThan":"*","versionType":"rpm","status":"unaffected"}],"cpes":["cpe:/o:redhat:rhel_els:7"]},{"vendor":"Red Hat","product":"Red Hat Enterprise Linux 8","collectionURL":"https://access.redhat.com/downloads/content/package-browser/","packageName":"xorg-x11-server-Xwayland","defaultStatus":"affected","versions":[{"version":"0:21.1.3-20.el8_10","lessThan":"*","versionType":"rpm","status":"unaffected"}],"cpes":["cpe:/a:redhat:enterprise_linux:8::appstream"]},{"vendor":"Red Hat","product":"Red Hat Enterprise Linux 8","collectionURL":"https://access.redhat.com/downloads/content/package-browser/","packageName":"xorg-x11-server","defaultStatus":"affected","versions":[{"version":"0:1.20.11-28.el8_10","lessThan":"*","versionType":"rpm","status":"unaffected"}],"cpes":["cpe:/a:redhat:enterprise_linux:8::appstream","cpe:/a:redhat:enterprise_linux:8::crb"]},{"vendor":"Red Hat","product":"Red Hat Enterprise Linux 8","collectionURL":"https://access.redhat.com/downloads/content/package-browser/","packageName":"tigervnc","defaultStatus":"affected","versions":[{"version":"0:1.15.0-9.el8_10","lessThan":"*","versionType":"rpm","status":"unaffected"}],"cpes":["cpe:/a:redhat:enterprise_linux:8::appstream"]},{"vendor":"Red Hat","product":"Red Hat Enterprise Linux 8.4 Advanced Mission Critical Update Support","collectionURL":"https://access.redhat.com/downloads/content/package-browser/","packageName":"xorg-x11-server","defaultStatus":"affected","versions":[{"version":"0:1.20.10-4.el8_4","lessThan":"*","versionType":"rpm","status":"unaffected"}],"cpes":["cpe:/a:redhat:rhel_aus:8.4::appstream","cpe:/a:redhat:rhel_eus_long_life:8.4::appstream"]},{"vendor":"Red Hat","product":"Red Hat Enterprise Linux 8.4 Advanced Mission Critical Update Support","collectionURL":"https://access.redhat.com/downloads/content/package-browser/","packageName":"tigervnc","defaultStatus":"affected","versions":[{"version":"0:1.11.0-8.el8_4.15","lessThan":"*","versionType":"rpm","status":"unaffected"}],"cpes":["cpe:/a:redhat:rhel_aus:8.4::appstream","cpe:/a:redhat:rhel_eus_long_life:8.4::appstream"]},{"vendor":"Red Hat","product":"Red Hat Enterprise Linux 8.4 Extended Update Support Long-Life Add-On","collectionURL":"https://access.redhat.com/downloads/content/package-browser/","packageName":"xorg-x11-server","defaultStatus":"affected","versions":[{"version":"0:1.20.10-4.el8_4","lessThan":"*","versionType":"rpm","status":"unaffected"}],"cpes":["cpe:/a:redhat:rhel_aus:8.4::appstream","cpe:/a:redhat:rhel_eus_long_life:8.4::appstream"]},{"vendor":"Red Hat","product":"Red Hat Enterprise Linux 8.4 Extended Update Support Long-Life Add-On","collectionURL":"https://access.redhat.com/downloads/content/package-browser/","packageName":"tigervnc","defaultStatus":"affected","versions":[{"version":"0:1.11.0-8.el8_4.15","lessThan":"*","versionType":"rpm","status":"unaffected"}],"cpes":["cpe:/a:redhat:rhel_aus:8.4::appstream","cpe:/a:redhat:rhel_eus_long_life:8.4::appstream"]},{"vendor":"Red Hat","product":"Red Hat Enterprise Linux 8.6 Advanced Mission Critical Update Support","collectionURL":"https://access.redhat.com/downloads/content/package-browser/","packageName":"xorg-x11-server-Xwayland","defaultStatus":"affected","versions":[{"version":"0:21.1.3-2.el8_6.6","lessThan":"*","versionType":"rpm","status":"unaffected"}],"cpes":["cpe:/a:redhat:rhel_aus:8.6::appstream","cpe:/a:redhat:rhel_e4s:8.6::appstream","cpe:/a:redhat:rhel_tus:8.6::appstream"]},{"vendor":"Red Hat","product":"Red Hat Enterprise Linux 8.6 Advanced Mission Critical Update Support","collectionURL":"https://access.redhat.com/downloads/content/package-browser/","packageName":"xorg-x11-server","defaultStatus":"affected","versions":[{"version":"0:1.20.11-7.el8_6","lessThan":"*","versionType":"rpm","status":"unaffected"}],"cpes":["cpe:/a:redhat:rhel_aus:8.6::appstream","cpe:/a:redhat:rhel_e4s:8.6::appstream","cpe:/a:redhat:rhel_tus:8.6::appstream"]},{"vendor":"Red Hat","product":"Red Hat Enterprise Linux 8.6 Advanced Mission Critical Update Support","collectionURL":"https://access.redhat.com/downloads/content/package-browser/","packageName":"tigervnc","defaultStatus":"affected","versions":[{"version":"0:1.12.0-6.el8_6.17","lessThan":"*","versionType":"rpm","status":"unaffected"}],"cpes":["cpe:/a:redhat:rhel_aus:8.6::appstream","cpe:/a:redhat:rhel_eus_long_life:8.6::appstream"]},{"vendor":"Red Hat","product":"Red Hat Enterprise Linux 8.6 Extended Update Support Long-Life Add-On","collectionURL":"https://access.redhat.com/downloads/content/package-browser/","packageName":"tigervnc","defaultStatus":"affected","versions":[{"version":"0:1.12.0-6.el8_6.17","lessThan":"*","versionType":"rpm","status":"unaffected"}],"cpes":["cpe:/a:redhat:rhel_aus:8.6::appstream","cpe:/a:redhat:rhel_eus_long_life:8.6::appstream"]},{"vendor":"Red Hat","product":"Red Hat Enterprise Linux 8.6 Telecommunications Update Service","collectionURL":"https://access.redhat.com/downloads/content/package-browser/","packageName":"xorg-x11-server-Xwayland","defaultStatus":"affected","versions":[{"version":"0:21.1.3-2.el8_6.6","lessThan":"*","versionType":"rpm","status":"unaffected"}],"cpes":["cpe:/a:redhat:rhel_aus:8.6::appstream","cpe:/a:redhat:rhel_e4s:8.6::appstream","cpe:/a:redhat:rhel_tus:8.6::appstream"]},{"vendor":"Red Hat","product":"Red Hat Enterprise Linux 8.6 Telecommunications Update Service","collectionURL":"https://access.redhat.com/downloads/content/package-browser/","packageName":"xorg-x11-server","defaultStatus":"affected","versions":[{"version":"0:1.20.11-7.el8_6","lessThan":"*","versionType":"rpm","status":"unaffected"}],"cpes":["cpe:/a:redhat:rhel_aus:8.6::appstream","cpe:/a:redhat:rhel_e4s:8.6::appstream","cpe:/a:redhat:rhel_tus:8.6::appstream"]},{"vendor":"Red Hat","product":"Red Hat Enterprise Linux 8.6 Update Services for SAP Solutions","collectionURL":"https://access.redhat.com/downloads/content/package-browser/","packageName":"xorg-x11-server-Xwayland","defaultStatus":"affected","versions":[{"version":"0:21.1.3-2.el8_6.6","lessThan":"*","versionType":"rpm","status":"unaffected"}],"cpes":["cpe:/a:redhat:rhel_aus:8.6::appstream","cpe:/a:redhat:rhel_e4s:8.6::appstream","cpe:/a:redhat:rhel_tus:8.6::appstream"]},{"vendor":"Red Hat","product":"Red Hat Enterprise Linux 8.6 Update Services for SAP Solutions","collectionURL":"https://access.redhat.com/downloads/content/package-browser/","packageName":"xorg-x11-server","defaultStatus":"affected","versions":[{"version":"0:1.20.11-7.el8_6","lessThan":"*","versionType":"rpm","status":"unaffected"}],"cpes":["cpe:/a:redhat:rhel_aus:8.6::appstream","cpe:/a:redhat:rhel_e4s:8.6::appstream","cpe:/a:redhat:rhel_tus:8.6::appstream"]},{"vendor":"Red Hat","product":"Red Hat Enterprise Linux 8.8 Telecommunications Update Service","collectionURL":"https://access.redhat.com/downloads/content/package-browser/","packageName":"xorg-x11-server-Xwayland","defaultStatus":"affected","versions":[{"version":"0:21.1.3-13.el8_8","lessThan":"*","versionType":"rpm","status":"unaffected"}],"cpes":["cpe:/a:redhat:rhel_e4s:8.8::appstream","cpe:/a:redhat:rhel_tus:8.8::appstream"]},{"vendor":"Red Hat","product":"Red Hat Enterprise Linux 8.8 Telecommunications Update Service","collectionURL":"https://access.redhat.com/downloads/content/package-browser/","packageName":"xorg-x11-server","defaultStatus":"affected","versions":[{"version":"0:1.20.11-18.el8_8","lessThan":"*","versionType":"rpm","status":"unaffected"}],"cpes":["cpe:/a:redhat:rhel_e4s:8.8::appstream","cpe:/a:redhat:rhel_tus:8.8::appstream"]},{"vendor":"Red Hat","product":"Red Hat Enterprise Linux 8.8 Telecommunications Update Service","collectionURL":"https://access.redhat.com/downloads/content/package-browser/","packageName":"tigervnc","defaultStatus":"affected","versions":[{"version":"0:1.12.0-15.el8_8.17","lessThan":"*","versionType":"rpm","status":"unaffected"}],"cpes":["cpe:/a:redhat:rhel_e4s:8.8::appstream","cpe:/a:redhat:rhel_tus:8.8::appstream"]},{"vendor":"Red Hat","product":"Red Hat Enterprise Linux 8.8 Update Services for SAP Solutions","collectionURL":"https://access.redhat.com/downloads/content/package-browser/","packageName":"xorg-x11-server-Xwayland","defaultStatus":"affected","versions":[{"version":"0:21.1.3-13.el8_8","lessThan":"*","versionType":"rpm","status":"unaffected"}],"cpes":["cpe:/a:redhat:rhel_e4s:8.8::appstream","cpe:/a:redhat:rhel_tus:8.8::appstream"]},{"vendor":"Red Hat","product":"Red Hat Enterprise Linux 8.8 Update Services for SAP Solutions","collectionURL":"https://access.redhat.com/downloads/content/package-browser/","packageName":"xorg-x11-server","defaultStatus":"affected","versions":[{"version":"0:1.20.11-18.el8_8","lessThan":"*","versionType":"rpm","status":"unaffected"}],"cpes":["cpe:/a:redhat:rhel_e4s:8.8::appstream","cpe:/a:redhat:rhel_tus:8.8::appstream"]},{"vendor":"Red Hat","product":"Red Hat Enterprise Linux 8.8 Update Services for SAP Solutions","collectionURL":"https://access.redhat.com/downloads/content/package-browser/","packageName":"tigervnc","defaultStatus":"affected","versions":[{"version":"0:1.12.0-15.el8_8.17","lessThan":"*","versionType":"rpm","status":"unaffected"}],"cpes":["cpe:/a:redhat:rhel_e4s:8.8::appstream","cpe:/a:redhat:rhel_tus:8.8::appstream"]},{"vendor":"Red Hat","product":"Red Hat Enterprise Linux 9","collectionURL":"https://access.redhat.com/downloads/content/package-browser/","packageName":"tigervnc","defaultStatus":"affected","versions":[{"version":"0:1.15.0-6.el9_7.1","lessThan":"*","versionType":"rpm","status":"unaffected"}],"cpes":["cpe:/a:redhat:enterprise_linux:9::appstream"]},{"vendor":"Red Hat","product":"Red Hat Enterprise Linux 9","collectionURL":"https://access.redhat.com/downloads/content/package-browser/","packageName":"xorg-x11-server-Xwayland","defaultStatus":"affected","versions":[{"version":"0:23.2.7-6.el9_7","lessThan":"*","versionType":"rpm","status":"unaffected"}],"cpes":["cpe:/a:redhat:enterprise_linux:9::appstream","cpe:/a:redhat:enterprise_linux:9::crb"]},{"vendor":"Red Hat","product":"Red Hat Enterprise Linux 9","collectionURL":"https://access.redhat.com/downloads/content/package-browser/","packageName":"xorg-x11-server","defaultStatus":"affected","versions":[{"version":"0:1.20.11-33.el9_7","lessThan":"*","versionType":"rpm","status":"unaffected"}],"cpes":["cpe:/a:redhat:enterprise_linux:9::appstream","cpe:/a:redhat:enterprise_linux:9::crb"]},{"vendor":"Red Hat","product":"Red Hat Enterprise Linux 9","collectionURL":"https://access.redhat.com/downloads/content/package-browser/","packageName":"tigervnc","defaultStatus":"affected","versions":[{"version":"0:1.15.0-7.el9_8.1","lessThan":"*","versionType":"rpm","status":"unaffected"}],"cpes":["cpe:/a:redhat:enterprise_linux:9::appstream"]},{"vendor":"Red Hat","product":"Red Hat Enterprise Linux 9","collectionURL":"https://access.redhat.com/downloads/content/package-browser/","packageName":"xorg-x11-server","defaultStatus":"affected","versions":[{"version":"0:1.20.11-34.el9_8","lessThan":"*","versionType":"rpm","status":"unaffected"}],"cpes":["cpe:/a:redhat:enterprise_linux:9::appstream","cpe:/a:redhat:enterprise_linux:9::crb"]},{"vendor":"Red Hat","product":"Red Hat Enterprise Linux 9","collectionURL":"https://access.redhat.com/downloads/content/package-browser/","packageName":"xorg-x11-server-Xwayland","defaultStatus":"affected","versions":[{"version":"0:24.1.9-4.el9_8","lessThan":"*","versionType":"rpm","status":"unaffected"}],"cpes":["cpe:/a:redhat:enterprise_linux:9::appstream","cpe:/a:redhat:enterprise_linux:9::crb"]},{"vendor":"Red Hat","product":"Red Hat Enterprise Linux 9.0 Update Services for SAP Solutions","collectionURL":"https://access.redhat.com/downloads/content/package-browser/","packageName":"xorg-x11-server-Xwayland","defaultStatus":"affected","versions":[{"version":"0:21.1.3-5.el9_0","lessThan":"*","versionType":"rpm","status":"unaffected"}],"cpes":["cpe:/a:redhat:rhel_e4s:9.0::appstream"]},{"vendor":"Red Hat","product":"Red Hat Enterprise Linux 9.0 Update Services for SAP Solutions","collectionURL":"https://access.redhat.com/downloads/content/package-browser/","packageName":"xorg-x11-server","defaultStatus":"affected","versions":[{"version":"0:1.20.11-13.el9_0","lessThan":"*","versionType":"rpm","status":"unaffected"}],"cpes":["cpe:/a:redhat:rhel_e4s:9.0::appstream"]},{"vendor":"Red Hat","product":"Red Hat Enterprise Linux 9.0 Update Services for SAP Solutions","collectionURL":"https://access.redhat.com/downloads/content/package-browser/","packageName":"tigervnc","defaultStatus":"affected","versions":[{"version":"0:1.11.0-22.el9_0.17","lessThan":"*","versionType":"rpm","status":"unaffected"}],"cpes":["cpe:/a:redhat:rhel_e4s:9.0::appstream"]},{"vendor":"Red Hat","product":"Red Hat Enterprise Linux 9.2 Update Services for SAP Solutions","collectionURL":"https://access.redhat.com/downloads/content/package-browser/","packageName":"xorg-x11-server-Xwayland","defaultStatus":"affected","versions":[{"version":"0:21.1.3-10.el9_2","lessThan":"*","versionType":"rpm","status":"unaffected"}],"cpes":["cpe:/a:redhat:rhel_e4s:9.2::appstream"]},{"vendor":"Red Hat","product":"Red Hat Enterprise Linux 9.2 Update Services for SAP Solutions","collectionURL":"https://access.redhat.com/downloads/content/package-browser/","packageName":"xorg-x11-server","defaultStatus":"affected","versions":[{"version":"0:1.20.11-20.el9_2","lessThan":"*","versionType":"rpm","status":"unaffected"}],"cpes":["cpe:/a:redhat:rhel_e4s:9.2::appstream"]},{"vendor":"Red Hat","product":"Red Hat Enterprise Linux 9.2 Update Services for SAP Solutions","collectionURL":"https://access.redhat.com/downloads/content/package-browser/","packageName":"tigervnc","defaultStatus":"affected","versions":[{"version":"0:1.12.0-14.el9_2.14","lessThan":"*","versionType":"rpm","status":"unaffected"}],"cpes":["cpe:/a:redhat:rhel_e4s:9.2::appstream"]},{"vendor":"Red Hat","product":"Red Hat Enterprise Linux 9.4 Extended Update Support","collectionURL":"https://access.redhat.com/downloads/content/package-browser/","packageName":"xorg-x11-server","defaultStatus":"affected","versions":[{"version":"0:1.20.11-28.el9_4","lessThan":"*","versionType":"rpm","status":"unaffected"}],"cpes":["cpe:/a:redhat:rhel_eus:9.4::appstream","cpe:/a:redhat:rhel_eus:9.4::crb"]},{"vendor":"Red Hat","product":"Red Hat Enterprise Linux 9.4 Extended Update Support","collectionURL":"https://access.redhat.com/downloads/content/package-browser/","packageName":"xorg-x11-server-Xwayland","defaultStatus":"affected","versions":[{"version":"0:22.1.9-8.el9_4","lessThan":"*","versionType":"rpm","status":"unaffected"}],"cpes":["cpe:/a:redhat:rhel_eus:9.4::appstream"]},{"vendor":"Red Hat","product":"Red Hat Enterprise Linux 9.4 Extended Update Support","collectionURL":"https://access.redhat.com/downloads/content/package-browser/","packageName":"tigervnc","defaultStatus":"affected","versions":[{"version":"0:1.13.1-8.el9_4.9","lessThan":"*","versionType":"rpm","status":"unaffected"}],"cpes":["cpe:/a:redhat:rhel_eus:9.4::appstream"]},{"vendor":"Red Hat","product":"Red Hat Enterprise Linux 9.6 Extended Update Support","collectionURL":"https://access.redhat.com/downloads/content/package-browser/","packageName":"xorg-x11-server","defaultStatus":"affected","versions":[{"version":"0:1.20.11-33.el9_6","lessThan":"*","versionType":"rpm","status":"unaffected"}],"cpes":["cpe:/a:redhat:rhel_eus:9.6::appstream","cpe:/a:redhat:rhel_eus:9.6::crb"]},{"vendor":"Red Hat","product":"Red Hat Enterprise Linux 9.6 Extended Update Support","collectionURL":"https://access.redhat.com/downloads/content/package-browser/","packageName":"xorg-x11-server-Xwayland","defaultStatus":"affected","versions":[{"version":"0:23.2.7-6.el9_6","lessThan":"*","versionType":"rpm","status":"unaffected"}],"cpes":["cpe:/a:redhat:rhel_eus:9.6::appstream","cpe:/a:redhat:rhel_eus:9.6::crb"]},{"vendor":"Red Hat","product":"Red Hat Enterprise Linux 9.6 Extended Update Support","collectionURL":"https://access.redhat.com/downloads/content/package-browser/","packageName":"tigervnc","defaultStatus":"affected","versions":[{"version":"0:1.14.1-10.el9_6","lessThan":"*","versionType":"rpm","status":"unaffected"}],"cpes":["cpe:/a:redhat:rhel_eus:9.6::appstream"]},{"vendor":"Red Hat","product":"Red Hat Enterprise Linux 6","collectionURL":"https://access.redhat.com/downloads/content/package-browser/","packageName":"xorg-x11-server","defaultStatus":"unknown","cpes":["cpe:/o:redhat:enterprise_linux:6"]}],"references":[{"url":"https://access.redhat.com/errata/RHSA-2026:10739","name":"RHSA-2026:10739","tags":["vendor-advisory","x_refsource_REDHAT"]},{"url":"https://access.redhat.com/errata/RHSA-2026:11352","name":"RHSA-2026:11352","tags":["vendor-advisory","x_refsource_REDHAT"]},{"url":"https://access.redhat.com/errata/RHSA-2026:11369","name":"RHSA-2026:11369","tags":["vendor-advisory","x_refsource_REDHAT"]},{"url":"https://access.redhat.com/errata/RHSA-2026:11388","name":"RHSA-2026:11388","tags":["vendor-advisory","x_refsource_REDHAT"]},{"url":"https://access.redhat.com/errata/RHSA-2026:11656","name":"RHSA-2026:11656","tags":["vendor-advisory","x_refsource_REDHAT"]},{"url":"https://access.redhat.com/errata/RHSA-2026:11692","name":"RHSA-2026:11692","tags":["vendor-advisory","x_refsource_REDHAT"]},{"url":"https://access.redhat.com/errata/RHSA-2026:13414","name":"RHSA-2026:13414","tags":["vendor-advisory","x_refsource_REDHAT"]},{"url":"https://access.redhat.com/errata/RHSA-2026:19125","name":"RHSA-2026:19125","tags":["vendor-advisory","x_refsource_REDHAT"]},{"url":"https://access.redhat.com/errata/RHSA-2026:19342","name":"RHSA-2026:19342","tags":["vendor-advisory","x_refsource_REDHAT"]},{"url":"https://access.redhat.com/errata/RHSA-2026:19343","name":"RHSA-2026:19343","tags":["vendor-advisory","x_refsource_REDHAT"]},{"url":"https://access.redhat.com/errata/RHSA-2026:19344","name":"RHSA-2026:19344","tags":["vendor-advisory","x_refsource_REDHAT"]},{"url":"https://access.redhat.com/errata/RHSA-2026:20547","name":"RHSA-2026:20547","tags":["vendor-advisory","x_refsource_REDHAT"]},{"url":"https://access.redhat.com/errata/RHSA-2026:20555","name":"RHSA-2026:20555","tags":["vendor-advisory","x_refsource_REDHAT"]},{"url":"https://access.redhat.com/errata/RHSA-2026:20557","name":"RHSA-2026:20557","tags":["vendor-advisory","x_refsource_REDHAT"]},{"url":"https://access.redhat.com/errata/RHSA-2026:20558","name":"RHSA-2026:20558","tags":["vendor-advisory","x_refsource_REDHAT"]},{"url":"https://access.redhat.com/errata/RHSA-2026:20560","name":"RHSA-2026:20560","tags":["vendor-advisory","x_refsource_REDHAT"]},{"url":"https://access.redhat.com/errata/RHSA-2026:20561","name":"RHSA-2026:20561","tags":["vendor-advisory","x_refsource_REDHAT"]},{"url":"https://access.redhat.com/errata/RHSA-2026:20562","name":"RHSA-2026:20562","tags":["vendor-advisory","x_refsource_REDHAT"]},{"url":"https://access.redhat.com/errata/RHSA-2026:20563","name":"RHSA-2026:20563","tags":["vendor-advisory","x_refsource_REDHAT"]},{"url":"https://access.redhat.com/errata/RHSA-2026:20575","name":"RHSA-2026:20575","tags":["vendor-advisory","x_refsource_REDHAT"]},{"url":"https://access.redhat.com/errata/RHSA-2026:20576","name":"RHSA-2026:20576","tags":["vendor-advisory","x_refsource_REDHAT"]},{"url":"https://access.redhat.com/errata/RHSA-2026:20590","name":"RHSA-2026:20590","tags":["vendor-advisory","x_refsource_REDHAT"]},{"url":"https://access.redhat.com/errata/RHSA-2026:21699","name":"RHSA-2026:21699","tags":["vendor-advisory","x_refsource_REDHAT"]},{"url":"https://access.redhat.com/errata/RHSA-2026:21712","name":"RHSA-2026:21712","tags":["vendor-advisory","x_refsource_REDHAT"]},{"url":"https://access.redhat.com/errata/RHSA-2026:21715","name":"RHSA-2026:21715","tags":["vendor-advisory","x_refsource_REDHAT"]},{"url":"https://access.redhat.com/errata/RHSA-2026:21716","name":"RHSA-2026:21716","tags":["vendor-advisory","x_refsource_REDHAT"]},{"url":"https://access.redhat.com/errata/RHSA-2026:21718","name":"RHSA-2026:21718","tags":["vendor-advisory","x_refsource_REDHAT"]},{"url":"https://access.redhat.com/errata/RHSA-2026:21741","name":"RHSA-2026:21741","tags":["vendor-advisory","x_refsource_REDHAT"]},{"url":"https://access.redhat.com/errata/RHSA-2026:21742","name":"RHSA-2026:21742","tags":["vendor-advisory","x_refsource_REDHAT"]},{"url":"https://access.redhat.com/errata/RHSA-2026:22424","name":"RHSA-2026:22424","tags":["vendor-advisory","x_refsource_REDHAT"]},{"url":"https://access.redhat.com/errata/RHSA-2026:22456","name":"RHSA-2026:22456","tags":["vendor-advisory","x_refsource_REDHAT"]},{"url":"https://access.redhat.com/errata/RHSA-2026:23254","name":"RHSA-2026:23254","tags":["vendor-advisory","x_refsource_REDHAT"]},{"url":"https://access.redhat.com/errata/RHSA-2026:23255","name":"RHSA-2026:23255","tags":["vendor-advisory","x_refsource_REDHAT"]},{"url":"https://access.redhat.com/errata/RHSA-2026:23496","name":"RHSA-2026:23496","tags":["vendor-advisory","x_refsource_REDHAT"]},{"url":"https://access.redhat.com/errata/RHSA-2026:24341","name":"RHSA-2026:24341","tags":["vendor-advisory","x_refsource_REDHAT"]},{"url":"https://access.redhat.com/security/cve/CVE-2026-34001","tags":["vdb-entry","x_refsource_REDHAT"]},{"url":"https://bugzilla.redhat.com/show_bug.cgi?id=2451109","name":"RHBZ#2451109","tags":["issue-tracking","x_refsource_REDHAT"]}],"datePublic":"2026-04-23T14:14:42.224Z","problemTypes":[{"descriptions":[{"cweId":"CWE-825","description":"Expired Pointer Dereference","lang":"en","type":"CWE"}]}],"x_redhatCweChain":"CWE-825: Expired Pointer Dereference","workarounds":[{"lang":"en","value":"To mitigate this issue, restrict access to the X11 server to trusted users and networks. If the X.Org X server is not required, consider disabling or uninstalling it. For environments where the X server is essential, running X applications within a sandboxed environment can help reduce the attack surface."}],"timeline":[{"lang":"en","time":"2026-03-25T07:00:05.329Z","value":"Reported to Red Hat."},{"lang":"en","time":"2026-04-23T14:14:42.224Z","value":"Made public."}],"credits":[{"lang":"en","value":"Red Hat would like to thank Jan-Niklas Sohn (TrendAI Zero Day Initiative) for reporting this issue."}],"providerMetadata":{"orgId":"53f830b8-0a3f-465b-8143-3b8a9948e749","shortName":"redhat","dateUpdated":"2026-06-08T03:19:51.388Z"},"x_generator":{"engine":"cvelib 1.8.0"}},"adp":[{"metrics":[{"other":{"type":"ssvc","content":{"timestamp":"2026-04-23T00:00:00+00:00","options":[{"Exploitation":"none"},{"Automatable":"no"},{"Technical Impact":"total"}],"role":"CISA Coordinator","version":"2.0.3","id":"CVE-2026-34001"}}}],"title":"CISA ADP Vulnrichment","providerMetadata":{"orgId":"134c704f-9b21-4f2e-91b3-4a467353bcc0","shortName":"CISA-ADP","dateUpdated":"2026-04-24T03:55:27.598Z"}},{"affected":[{"collectionURL":"https://access.redhat.com/downloads/content/package-browser/","cpes":["cpe:/o:redhat:enterprise_linux:10.1","cpe:/o:redhat:enterprise_linux:10.2"],"defaultStatus":"affected","packageName":"xorg-x11-server-Xwayland","product":"Red Hat Enterprise Linux 10","vendor":"Red Hat","versions":[{"lessThan":"*","status":"unaffected","version":"0:24.1.5-6.el10_1","versionType":"rpm"},{"lessThan":"*","status":"unaffected","version":"0:24.1.9-4.el10_2","versionType":"rpm"}]},{"collectionURL":"https://access.redhat.com/downloads/content/package-browser/","cpes":["cpe:/o:redhat:enterprise_linux_eus:10.0"],"defaultStatus":"affected","packageName":"xorg-x11-server-Xwayland","product":"Red Hat Enterprise Linux 10.0 Extended Update Support","vendor":"Red Hat","versions":[{"lessThan":"*","status":"unaffected","version":"0:24.1.5-6.el10_0","versionType":"rpm"}]},{"collectionURL":"https://access.redhat.com/downloads/content/package-browser/","cpes":["cpe:/o:redhat:rhel_els:6"],"defaultStatus":"affected","packageName":"tigervnc","product":"Red Hat Enterprise Linux 6 Extended Lifecycle Support  - EXTENSION","vendor":"Red Hat","versions":[{"lessThan":"*","status":"unaffected","version":"0:1.1.0-25.el6_10.16","versionType":"rpm"}]},{"collectionURL":"https://access.redhat.com/downloads/content/package-browser/","cpes":["cpe:/o:redhat:rhel_els:7"],"defaultStatus":"affected","packageName":"xorg-x11-server","product":"Red Hat Enterprise Linux 7 Extended Lifecycle Support","vendor":"Red Hat","versions":[{"lessThan":"*","status":"unaffected","version":"0:1.20.4-34.el7_9","versionType":"rpm"}]},{"collectionURL":"https://access.redhat.com/downloads/content/package-browser/","cpes":["cpe:/o:redhat:rhel_els:7"],"defaultStatus":"affected","packageName":"tigervnc","product":"Red Hat Enterprise Linux 7 Extended Lifecycle Support","vendor":"Red Hat","versions":[{"lessThan":"*","status":"unaffected","version":"0:1.8.0-36.el7_9.4","versionType":"rpm"}]},{"collectionURL":"https://access.redhat.com/downloads/content/package-browser/","cpes":["cpe:/a:redhat:enterprise_linux:8"],"defaultStatus":"affected","packageName":"xorg-x11-server-Xwayland","product":"Red Hat Enterprise Linux 8","vendor":"Red Hat","versions":[{"lessThan":"*","status":"unaffected","version":"0:21.1.3-20.el8_10","versionType":"rpm"}]},{"collectionURL":"https://access.redhat.com/downloads/content/package-browser/","cpes":["cpe:/a:redhat:enterprise_linux:8"],"defaultStatus":"affected","packageName":"xorg-x11-server","product":"Red Hat Enterprise Linux 8","vendor":"Red Hat","versions":[{"lessThan":"*","status":"unaffected","version":"0:1.20.11-28.el8_10","versionType":"rpm"}]},{"collectionURL":"https://access.redhat.com/downloads/content/package-browser/","cpes":["cpe:/a:redhat:enterprise_linux:8"],"defaultStatus":"affected","packageName":"tigervnc","product":"Red Hat Enterprise Linux 8","vendor":"Red Hat","versions":[{"lessThan":"*","status":"unaffected","version":"0:1.15.0-9.el8_10","versionType":"rpm"}]},{"collectionURL":"https://access.redhat.com/downloads/content/package-browser/","cpes":["cpe:/a:redhat:rhel_aus:8.4"],"defaultStatus":"affected","packageName":"xorg-x11-server","product":"Red Hat Enterprise Linux 8.4 Advanced Mission Critical Update Support","vendor":"Red Hat","versions":[{"lessThan":"*","status":"unaffected","version":"0:1.20.10-4.el8_4","versionType":"rpm"}]},{"collectionURL":"https://access.redhat.com/downloads/content/package-browser/","cpes":["cpe:/a:redhat:rhel_aus:8.4"],"defaultStatus":"affected","packageName":"tigervnc","product":"Red Hat Enterprise Linux 8.4 Advanced Mission Critical Update Support","vendor":"Red Hat","versions":[{"lessThan":"*","status":"unaffected","version":"0:1.11.0-8.el8_4.15","versionType":"rpm"}]},{"collectionURL":"https://access.redhat.com/downloads/content/package-browser/","cpes":["cpe:/a:redhat:rhel_eus_long_life:8.4"],"defaultStatus":"affected","packageName":"xorg-x11-server","product":"Red Hat Enterprise Linux 8.4 Extended Update Support Long-Life Add-On","vendor":"Red Hat","versions":[{"lessThan":"*","status":"unaffected","version":"0:1.20.10-4.el8_4","versionType":"rpm"}]},{"collectionURL":"https://access.redhat.com/downloads/content/package-browser/","cpes":["cpe:/a:redhat:rhel_eus_long_life:8.4"],"defaultStatus":"affected","packageName":"tigervnc","product":"Red Hat Enterprise Linux 8.4 Extended Update Support Long-Life Add-On","vendor":"Red Hat","versions":[{"lessThan":"*","status":"unaffected","version":"0:1.11.0-8.el8_4.15","versionType":"rpm"}]},{"collectionURL":"https://access.redhat.com/downloads/content/package-browser/","cpes":["cpe:/a:redhat:rhel_aus:8.6"],"defaultStatus":"affected","packageName":"xorg-x11-server-Xwayland","product":"Red Hat Enterprise Linux 8.6 Advanced Mission Critical Update Support","vendor":"Red Hat","versions":[{"lessThan":"*","status":"unaffected","version":"0:21.1.3-2.el8_6.6","versionType":"rpm"}]},{"collectionURL":"https://access.redhat.com/downloads/content/package-browser/","cpes":["cpe:/a:redhat:rhel_aus:8.6"],"defaultStatus":"affected","packageName":"xorg-x11-server","product":"Red Hat Enterprise Linux 8.6 Advanced Mission Critical Update Support","vendor":"Red Hat","versions":[{"lessThan":"*","status":"unaffected","version":"0:1.20.11-7.el8_6","versionType":"rpm"}]},{"collectionURL":"https://access.redhat.com/downloads/content/package-browser/","cpes":["cpe:/a:redhat:rhel_aus:8.6"],"defaultStatus":"affected","packageName":"tigervnc","product":"Red Hat Enterprise Linux 8.6 Advanced Mission Critical Update Support","vendor":"Red Hat","versions":[{"lessThan":"*","status":"unaffected","version":"0:1.12.0-6.el8_6.17","versionType":"rpm"}]},{"collectionURL":"https://access.redhat.com/downloads/content/package-browser/","cpes":["cpe:/a:redhat:rhel_eus_long_life:8.6"],"defaultStatus":"affected","packageName":"tigervnc","product":"Red Hat Enterprise Linux 8.6 Extended Update Support Long-Life Add-On","vendor":"Red Hat","versions":[{"lessThan":"*","status":"unaffected","version":"0:1.12.0-6.el8_6.17","versionType":"rpm"}]},{"collectionURL":"https://access.redhat.com/downloads/content/package-browser/","cpes":["cpe:/a:redhat:rhel_tus:8.6"],"defaultStatus":"affected","packageName":"xorg-x11-server-Xwayland","product":"Red Hat Enterprise Linux 8.6 Telecommunications Update Service","vendor":"Red Hat","versions":[{"lessThan":"*","status":"unaffected","version":"0:21.1.3-2.el8_6.6","versionType":"rpm"}]},{"collectionURL":"https://access.redhat.com/downloads/content/package-browser/","cpes":["cpe:/a:redhat:rhel_tus:8.6"],"defaultStatus":"affected","packageName":"xorg-x11-server","product":"Red Hat Enterprise Linux 8.6 Telecommunications Update Service","vendor":"Red Hat","versions":[{"lessThan":"*","status":"unaffected","version":"0:1.20.11-7.el8_6","versionType":"rpm"}]},{"collectionURL":"https://access.redhat.com/downloads/content/package-browser/","cpes":["cpe:/a:redhat:rhel_e4s:8.6"],"defaultStatus":"affected","packageName":"xorg-x11-server-Xwayland","product":"Red Hat Enterprise Linux 8.6 Update Services for SAP Solutions","vendor":"Red Hat","versions":[{"lessThan":"*","status":"unaffected","version":"0:21.1.3-2.el8_6.6","versionType":"rpm"}]},{"collectionURL":"https://access.redhat.com/downloads/content/package-browser/","cpes":["cpe:/a:redhat:rhel_e4s:8.6"],"defaultStatus":"affected","packageName":"xorg-x11-server","product":"Red Hat Enterprise Linux 8.6 Update Services for SAP Solutions","vendor":"Red Hat","versions":[{"lessThan":"*","status":"unaffected","version":"0:1.20.11-7.el8_6","versionType":"rpm"}]},{"collectionURL":"https://access.redhat.com/downloads/content/package-browser/","cpes":["cpe:/a:redhat:rhel_tus:8.8"],"defaultStatus":"affected","packageName":"xorg-x11-server-Xwayland","product":"Red Hat Enterprise Linux 8.8 Telecommunications Update Service","vendor":"Red Hat","versions":[{"lessThan":"*","status":"unaffected","version":"0:21.1.3-13.el8_8","versionType":"rpm"}]},{"collectionURL":"https://access.redhat.com/downloads/content/package-browser/","cpes":["cpe:/a:redhat:rhel_tus:8.8"],"defaultStatus":"affected","packageName":"xorg-x11-server","product":"Red Hat Enterprise Linux 8.8 Telecommunications Update Service","vendor":"Red Hat","versions":[{"lessThan":"*","status":"unaffected","version":"0:1.20.11-18.el8_8","versionType":"rpm"}]},{"collectionURL":"https://access.redhat.com/downloads/content/package-browser/","cpes":["cpe:/a:redhat:rhel_tus:8.8"],"defaultStatus":"affected","packageName":"tigervnc","product":"Red Hat Enterprise Linux 8.8 Telecommunications Update Service","vendor":"Red Hat","versions":[{"lessThan":"*","status":"unaffected","version":"0:1.12.0-15.el8_8.17","versionType":"rpm"}]},{"collectionURL":"https://access.redhat.com/downloads/content/package-browser/","cpes":["cpe:/a:redhat:rhel_e4s:8.8"],"defaultStatus":"affected","packageName":"xorg-x11-server-Xwayland","product":"Red Hat Enterprise Linux 8.8 Update Services for SAP Solutions","vendor":"Red Hat","versions":[{"lessThan":"*","status":"unaffected","version":"0:21.1.3-13.el8_8","versionType":"rpm"}]},{"collectionURL":"https://access.redhat.com/downloads/content/package-browser/","cpes":["cpe:/a:redhat:rhel_e4s:8.8"],"defaultStatus":"affected","packageName":"xorg-x11-server","product":"Red Hat Enterprise Linux 8.8 Update Services for SAP Solutions","vendor":"Red Hat","versions":[{"lessThan":"*","status":"unaffected","version":"0:1.20.11-18.el8_8","versionType":"rpm"}]},{"collectionURL":"https://access.redhat.com/downloads/content/package-browser/","cpes":["cpe:/a:redhat:rhel_e4s:8.8"],"defaultStatus":"affected","packageName":"tigervnc","product":"Red Hat Enterprise Linux 8.8 Update Services for SAP Solutions","vendor":"Red Hat","versions":[{"lessThan":"*","status":"unaffected","version":"0:1.12.0-15.el8_8.17","versionType":"rpm"}]},{"collectionURL":"https://access.redhat.com/downloads/content/package-browser/","cpes":["cpe:/a:redhat:enterprise_linux:9"],"defaultStatus":"affected","packageName":"tigervnc","product":"Red Hat Enterprise Linux 9","vendor":"Red Hat","versions":[{"lessThan":"*","status":"unaffected","version":"0:1.15.0-6.el9_7.1","versionType":"rpm"},{"lessThan":"*","status":"unaffected","version":"0:1.15.0-7.el9_8.1","versionType":"rpm"}]},{"collectionURL":"https://access.redhat.com/downloads/content/package-browser/","cpes":["cpe:/a:redhat:enterprise_linux:9"],"defaultStatus":"affected","packageName":"xorg-x11-server-Xwayland","product":"Red Hat Enterprise Linux 9","vendor":"Red Hat","versions":[{"lessThan":"*","status":"unaffected","version":"0:23.2.7-6.el9_7","versionType":"rpm"},{"lessThan":"*","status":"unaffected","version":"0:24.1.9-4.el9_8","versionType":"rpm"}]},{"collectionURL":"https://access.redhat.com/downloads/content/package-browser/","cpes":["cpe:/a:redhat:enterprise_linux:9"],"defaultStatus":"affected","packageName":"xorg-x11-server","product":"Red Hat Enterprise Linux 9","vendor":"Red Hat","versions":[{"lessThan":"*","status":"unaffected","version":"0:1.20.11-33.el9_7","versionType":"rpm"},{"lessThan":"*","status":"unaffected","version":"0:1.20.11-34.el9_8","versionType":"rpm"}]},{"collectionURL":"https://access.redhat.com/downloads/content/package-browser/","cpes":["cpe:/a:redhat:rhel_e4s:9.0"],"defaultStatus":"affected","packageName":"xorg-x11-server-Xwayland","product":"Red Hat Enterprise Linux 9.0 Update Services for SAP Solutions","vendor":"Red Hat","versions":[{"lessThan":"*","status":"unaffected","version":"0:21.1.3-5.el9_0","versionType":"rpm"}]},{"collectionURL":"https://access.redhat.com/downloads/content/package-browser/","cpes":["cpe:/a:redhat:rhel_e4s:9.0"],"defaultStatus":"affected","packageName":"xorg-x11-server","product":"Red Hat Enterprise Linux 9.0 Update Services for SAP Solutions","vendor":"Red Hat","versions":[{"lessThan":"*","status":"unaffected","version":"0:1.20.11-13.el9_0","versionType":"rpm"}]},{"collectionURL":"https://access.redhat.com/downloads/content/package-browser/","cpes":["cpe:/a:redhat:rhel_e4s:9.0"],"defaultStatus":"affected","packageName":"tigervnc","product":"Red Hat Enterprise Linux 9.0 Update Services for SAP Solutions","vendor":"Red Hat","versions":[{"lessThan":"*","status":"unaffected","version":"0:1.11.0-22.el9_0.17","versionType":"rpm"}]},{"collectionURL":"https://access.redhat.com/downloads/content/package-browser/","cpes":["cpe:/a:redhat:rhel_e4s:9.2"],"defaultStatus":"affected","packageName":"xorg-x11-server-Xwayland","product":"Red Hat Enterprise Linux 9.2 Update Services for SAP Solutions","vendor":"Red Hat","versions":[{"lessThan":"*","status":"unaffected","version":"0:21.1.3-10.el9_2","versionType":"rpm"}]},{"collectionURL":"https://access.redhat.com/downloads/content/package-browser/","cpes":["cpe:/a:redhat:rhel_e4s:9.2"],"defaultStatus":"affected","packageName":"xorg-x11-server","product":"Red Hat Enterprise Linux 9.2 Update Services for SAP Solutions","vendor":"Red Hat","versions":[{"lessThan":"*","status":"unaffected","version":"0:1.20.11-20.el9_2","versionType":"rpm"}]},{"collectionURL":"https://access.redhat.com/downloads/content/package-browser/","cpes":["cpe:/a:redhat:rhel_e4s:9.2"],"defaultStatus":"affected","packageName":"tigervnc","product":"Red Hat Enterprise Linux 9.2 Update Services for SAP Solutions","vendor":"Red Hat","versions":[{"lessThan":"*","status":"unaffected","version":"0:1.12.0-14.el9_2.14","versionType":"rpm"}]},{"collectionURL":"https://access.redhat.com/downloads/content/package-browser/","cpes":["cpe:/a:redhat:rhel_eus:9.4"],"defaultStatus":"affected","packageName":"xorg-x11-server","product":"Red Hat Enterprise Linux 9.4 Extended Update Support","vendor":"Red Hat","versions":[{"lessThan":"*","status":"unaffected","version":"0:1.20.11-28.el9_4","versionType":"rpm"}]},{"collectionURL":"https://access.redhat.com/downloads/content/package-browser/","cpes":["cpe:/a:redhat:rhel_eus:9.4"],"defaultStatus":"affected","packageName":"xorg-x11-server-Xwayland","product":"Red Hat Enterprise Linux 9.4 Extended Update Support","vendor":"Red Hat","versions":[{"lessThan":"*","status":"unaffected","version":"0:22.1.9-8.el9_4","versionType":"rpm"}]},{"collectionURL":"https://access.redhat.com/downloads/content/package-browser/","cpes":["cpe:/a:redhat:rhel_eus:9.4"],"defaultStatus":"affected","packageName":"tigervnc","product":"Red Hat Enterprise Linux 9.4 Extended Update Support","vendor":"Red Hat","versions":[{"lessThan":"*","status":"unaffected","version":"0:1.13.1-8.el9_4.9","versionType":"rpm"}]},{"collectionURL":"https://access.redhat.com/downloads/content/package-browser/","cpes":["cpe:/a:redhat:rhel_eus:9.6"],"defaultStatus":"affected","packageName":"xorg-x11-server","product":"Red Hat Enterprise Linux 9.6 Extended Update Support","vendor":"Red Hat","versions":[{"lessThan":"*","status":"unaffected","version":"0:1.20.11-33.el9_6","versionType":"rpm"}]},{"collectionURL":"https://access.redhat.com/downloads/content/package-browser/","cpes":["cpe:/a:redhat:rhel_eus:9.6"],"defaultStatus":"affected","packageName":"xorg-x11-server-Xwayland","product":"Red Hat Enterprise Linux 9.6 Extended Update Support","vendor":"Red Hat","versions":[{"lessThan":"*","status":"unaffected","version":"0:23.2.7-6.el9_6","versionType":"rpm"}]},{"collectionURL":"https://access.redhat.com/downloads/content/package-browser/","cpes":["cpe:/a:redhat:rhel_eus:9.6"],"defaultStatus":"affected","packageName":"tigervnc","product":"Red Hat Enterprise Linux 9.6 Extended Update Support","vendor":"Red Hat","versions":[{"lessThan":"*","status":"unaffected","version":"0:1.14.1-10.el9_6","versionType":"rpm"}]},{"collectionURL":"https://access.redhat.com/downloads/content/package-browser/","cpes":["cpe:/o:redhat:enterprise_linux:6"],"defaultStatus":"unknown","packageName":"xorg-x11-server","product":"Red Hat Enterprise Linux 6","vendor":"Red Hat"}],"datePublic":"2026-04-23T14:14:42.224Z","descriptions":[{"lang":"en","value":"A flaw was found in the X.Org X server. This use-after-free vulnerability occurs in the XSYNC fence triggering logic, specifically within the miSyncTriggerFence() function. An attacker with access to the X11 server can exploit this without user interaction, leading to a server crash and potentially enabling memory corruption. This could result in a denial of service or further compromise of the system."}],"metrics":[{"other":{"content":{"namespace":"https://access.redhat.com/security/updates/classification/","value":"Important"},"type":"Red Hat severity rating"}},{"cvssV3_1":{"attackComplexity":"LOW","attackVector":"LOCAL","availabilityImpact":"HIGH","baseScore":7.8,"baseSeverity":"HIGH","confidentialityImpact":"HIGH","integrityImpact":"HIGH","privilegesRequired":"LOW","scope":"UNCHANGED","userInteraction":"NONE","vectorString":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H","version":"3.1"},"format":"CVSS"}],"problemTypes":[{"descriptions":[{"cweId":"CWE-825","description":"Expired Pointer Dereference","lang":"en","type":"CWE"}]}],"references":[{"tags":["vdb-entry","x_refsource_REDHAT"],"url":"https://access.redhat.com/security/cve/CVE-2026-34001"},{"name":"RHBZ#2451109","tags":["issue-tracking","x_refsource_REDHAT"],"url":"https://bugzilla.redhat.com/show_bug.cgi?id=2451109"},{"tags":["x_sadp-csaf-vex"],"url":"https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-34001.json"},{"tags":["vendor-advisory","x_refsource_REDHAT"],"url":"https://access.redhat.com/errata/RHSA-2026:23496"},{"tags":["vendor-advisory","x_refsource_REDHAT"],"url":"https://access.redhat.com/errata/RHSA-2026:22456"},{"tags":["vendor-advisory","x_refsource_REDHAT"],"url":"https://access.redhat.com/errata/RHSA-2026:20590"},{"tags":["vendor-advisory","x_refsource_REDHAT"],"url":"https://access.redhat.com/errata/RHSA-2026:20563"},{"tags":["vendor-advisory","x_refsource_REDHAT"],"url":"https://access.redhat.com/errata/RHSA-2026:11352"},{"tags":["vendor-advisory","x_refsource_REDHAT"],"url":"https://access.redhat.com/errata/RHSA-2026:19125"},{"tags":["vendor-advisory","x_refsource_REDHAT"],"url":"https://access.redhat.com/errata/RHSA-2026:13414"},{"tags":["vendor-advisory","x_refsource_REDHAT"],"url":"https://access.redhat.com/errata/RHSA-2026:11692"},{"tags":["vendor-advisory","x_refsource_REDHAT"],"url":"https://access.redhat.com/errata/RHSA-2026:11656"},{"tags":["vendor-advisory","x_refsource_REDHAT"],"url":"https://access.redhat.com/errata/RHSA-2026:23254"},{"tags":["vendor-advisory","x_refsource_REDHAT"],"url":"https://access.redhat.com/errata/RHSA-2026:21715"},{"tags":["vendor-advisory","x_refsource_REDHAT"],"url":"https://access.redhat.com/errata/RHSA-2026:24341"},{"tags":["vendor-advisory","x_refsource_REDHAT"],"url":"https://access.redhat.com/errata/RHSA-2026:21718"},{"tags":["vendor-advisory","x_refsource_REDHAT"],"url":"https://access.redhat.com/errata/RHSA-2026:21716"},{"tags":["vendor-advisory","x_refsource_REDHAT"],"url":"https://access.redhat.com/errata/RHSA-2026:23255"},{"tags":["vendor-advisory","x_refsource_REDHAT"],"url":"https://access.redhat.com/errata/RHSA-2026:21742"},{"tags":["vendor-advisory","x_refsource_REDHAT"],"url":"https://access.redhat.com/errata/RHSA-2026:21712"},{"tags":["vendor-advisory","x_refsource_REDHAT"],"url":"https://access.redhat.com/errata/RHSA-2026:21741"},{"tags":["vendor-advisory","x_refsource_REDHAT"],"url":"https://access.redhat.com/errata/RHSA-2026:21699"},{"tags":["vendor-advisory","x_refsource_REDHAT"],"url":"https://access.redhat.com/errata/RHSA-2026:20562"},{"tags":["vendor-advisory","x_refsource_REDHAT"],"url":"https://access.redhat.com/errata/RHSA-2026:20576"},{"tags":["vendor-advisory","x_refsource_REDHAT"],"url":"https://access.redhat.com/errata/RHSA-2026:20557"},{"tags":["vendor-advisory","x_refsource_REDHAT"],"url":"https://access.redhat.com/errata/RHSA-2026:20547"},{"tags":["vendor-advisory","x_refsource_REDHAT"],"url":"https://access.redhat.com/errata/RHSA-2026:20575"},{"tags":["vendor-advisory","x_refsource_REDHAT"],"url":"https://access.redhat.com/errata/RHSA-2026:20555"},{"tags":["vendor-advisory","x_refsource_REDHAT"],"url":"https://access.redhat.com/errata/RHSA-2026:20560"},{"tags":["vendor-advisory","x_refsource_REDHAT"],"url":"https://access.redhat.com/errata/RHSA-2026:22424"},{"tags":["vendor-advisory","x_refsource_REDHAT"],"url":"https://access.redhat.com/errata/RHSA-2026:20558"},{"tags":["vendor-advisory","x_refsource_REDHAT"],"url":"https://access.redhat.com/errata/RHSA-2026:20561"},{"tags":["vendor-advisory","x_refsource_REDHAT"],"url":"https://access.redhat.com/errata/RHSA-2026:10739"},{"tags":["vendor-advisory","x_refsource_REDHAT"],"url":"https://access.redhat.com/errata/RHSA-2026:11388"},{"tags":["vendor-advisory","x_refsource_REDHAT"],"url":"https://access.redhat.com/errata/RHSA-2026:11369"},{"tags":["vendor-advisory","x_refsource_REDHAT"],"url":"https://access.redhat.com/errata/RHSA-2026:19342"},{"tags":["vendor-advisory","x_refsource_REDHAT"],"url":"https://access.redhat.com/errata/RHSA-2026:19343"},{"tags":["vendor-advisory","x_refsource_REDHAT"],"url":"https://access.redhat.com/errata/RHSA-2026:19344"}],"solutions":[{"lang":"en","value":"RHSA-2026:23496: Red Hat Enterprise Linux Server -EXTENSION(v. 6 ELS-EXTENSION), Red Hat Enterprise Linux Server Optional -EXTENSION (v. 6 ELS -EXTENSION)"},{"lang":"en","value":"RHSA-2026:22456: Red Hat Enterprise Linux Server (v. 7 ELS), Red Hat Enterprise Linux Server Optional (v. 7 ELS)"},{"lang":"en","value":"RHSA-2026:20590: Red Hat Enterprise Linux Server (v. 7 ELS), Red Hat Enterprise Linux Server Optional (v. 7 ELS)"},{"lang":"en","value":"RHSA-2026:20563: Red Hat Enterprise Linux AppStream EUS (v. 10.0), Red Hat Enterprise Linux CodeReady Linux Builder EUS (v. 10.0)"},{"lang":"en","value":"RHSA-2026:11352: Red Hat Enterprise Linux AppStream (v. 10), Red Hat Enterprise Linux CodeReady Linux Builder (v. 10)"},{"lang":"en","value":"RHSA-2026:19125: Red Hat Enterprise Linux AppStream (v. 10), Red Hat Enterprise Linux CodeReady Linux Builder (v. 10)"},{"lang":"en","value":"RHSA-2026:13414: Red Hat Enterprise Linux AppStream (v. 8)"},{"lang":"en","value":"RHSA-2026:11692: Red Hat Enterprise Linux AppStream (v. 8), Red Hat Enterprise Linux CRB (v. 8)"},{"lang":"en","value":"RHSA-2026:11656: Red Hat Enterprise Linux AppStream (v. 8)"},{"lang":"en","value":"RHSA-2026:23254: Red Hat Enterprise Linux AppStream AUS (v.8.4), Red Hat Enterprise Linux AppStream EUS EXTENSION (v.8.4)"},{"lang":"en","value":"RHSA-2026:21715: Red Hat Enterprise Linux AppStream AUS (v.8.4), Red Hat Enterprise Linux AppStream EUS EXTENSION (v.8.4)"},{"lang":"en","value":"RHSA-2026:24341: Red Hat Enterprise Linux AppStream AUS (v.8.6), Red Hat Enterprise Linux AppStream EUS EXTENSION (v.8.6)"},{"lang":"en","value":"RHSA-2026:21718: Red Hat Enterprise Linux AppStream AUS (v.8.6), Red Hat Enterprise Linux AppStream E4S (v.8.6), Red Hat Enterprise Linux AppStream TUS (v.8.6)"},{"lang":"en","value":"RHSA-2026:21716: Red Hat Enterprise Linux AppStream AUS (v.8.6), Red Hat Enterprise Linux AppStream E4S (v.8.6), Red Hat Enterprise Linux AppStream TUS (v.8.6)"},{"lang":"en","value":"RHSA-2026:23255: Red Hat Enterprise Linux AppStream E4S (v.8.8), Red Hat Enterprise Linux AppStream TUS (v.8.8)"},{"lang":"en","value":"RHSA-2026:21742: Red Hat Enterprise Linux AppStream E4S (v.8.8), Red Hat Enterprise Linux AppStream TUS (v.8.8)"},{"lang":"en","value":"RHSA-2026:21712: Red Hat Enterprise Linux AppStream E4S (v.8.8), Red Hat Enterprise Linux AppStream TUS (v.8.8)"},{"lang":"en","value":"RHSA-2026:21741: Red Hat Enterprise Linux AppStream E4S (v.9.0)"},{"lang":"en","value":"RHSA-2026:21699: Red Hat Enterprise Linux AppStream E4S (v.9.0)"},{"lang":"en","value":"RHSA-2026:20562: Red Hat Enterprise Linux AppStream E4S (v.9.0)"},{"lang":"en","value":"RHSA-2026:20576: Red Hat Enterprise Linux AppStream E4S (v.9.2)"},{"lang":"en","value":"RHSA-2026:20557: Red Hat Enterprise Linux AppStream E4S (v.9.2)"},{"lang":"en","value":"RHSA-2026:20547: Red Hat Enterprise Linux AppStream E4S (v.9.2)"},{"lang":"en","value":"RHSA-2026:20575: Red Hat Enterprise Linux AppStream EUS (v.9.4)"},{"lang":"en","value":"RHSA-2026:20555: Red Hat CodeReady Linux Builder EUS (v.9.4), Red Hat Enterprise Linux AppStream EUS (v.9.4)"},{"lang":"en","value":"RHSA-2026:20560: Red Hat Enterprise Linux AppStream EUS (v.9.4)"},{"lang":"en","value":"RHSA-2026:22424: Red Hat Enterprise Linux AppStream EUS (v.9.6)"},{"lang":"en","value":"RHSA-2026:20558: Red Hat CodeReady Linux Builder EUS (v.9.6), Red Hat Enterprise Linux AppStream EUS (v.9.6)"},{"lang":"en","value":"RHSA-2026:20561: Red Hat CodeReady Linux Builder EUS (v.9.6), Red Hat Enterprise Linux AppStream EUS (v.9.6)"},{"lang":"en","value":"RHSA-2026:10739: Red Hat Enterprise Linux AppStream (v. 9)"},{"lang":"en","value":"RHSA-2026:11388: Red Hat Enterprise Linux AppStream (v. 9), Red Hat Enterprise Linux CodeReady Linux Builder (v. 9)"},{"lang":"en","value":"RHSA-2026:11369: Red Hat Enterprise Linux AppStream (v. 9), Red Hat Enterprise Linux CodeReady Linux Builder (v. 9)"},{"lang":"en","value":"RHSA-2026:19342: Red Hat Enterprise Linux AppStream (v. 9)"},{"lang":"en","value":"RHSA-2026:19343: Red Hat Enterprise Linux AppStream (v. 9), Red Hat Enterprise Linux CodeReady Linux Builder (v. 9)"},{"lang":"en","value":"RHSA-2026:19344: Red Hat Enterprise Linux AppStream (v. 9), Red Hat Enterprise Linux CodeReady Linux Builder (v. 9)"}],"timeline":[{"lang":"en","time":"2026-03-25T07:00:05.329Z","value":"Reported to Red Hat."},{"lang":"en","time":"2026-04-23T14:14:42.224Z","value":"Made public."}],"title":"xorg: xwayland: X.Org X server: Use-after-free vulnerability leads to server crash and potential memory corruption","workarounds":[{"lang":"en","value":"To mitigate this issue, restrict access to the X11 server to trusted users and networks. If the X.Org X server is not required, consider disabling or uninstalling it. For environments where the X server is essential, running X applications within a sandboxed environment can help reduce the attack surface."}],"x_adpType":"supplier","x_generator":{"engine":"sadp-cli 1.0.0"},"providerMetadata":{"orgId":"0b0ca135-0b70-47e7-9f44-1890c2a1c46c","shortName":"redhat-SADP","dateUpdated":"2026-07-15T01:04:53.429Z"}}]}}