{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2026-64055","assignerOrgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","state":"PUBLISHED","assignerShortName":"Linux","dateReserved":"2026-07-19T07:54:57.030Z","datePublished":"2026-07-19T15:39:37.077Z","dateUpdated":"2026-07-20T13:42:52.779Z"},"containers":{"cna":{"providerMetadata":{"orgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","shortName":"Linux","dateUpdated":"2026-07-20T13:42:52.779Z"},"descriptions":[{"lang":"en","value":"In the Linux kernel, the following vulnerability has been resolved:\n\nnet: ethernet: cortina: Carry over frag counter\n\nThe gmac_rx() NAPI poll function assembles packets in an\nSKB from a ring buffer.\n\nIf the ring buffer gets completely emptied during a poll cycle,\nwe exit gmac_rx(), but the packet is not yet completely\nassembled in the SKB, yet the fragment counter frag_nr is\nreset to zero on the next invocation.\n\nSolve this by making the RX fragment counter a part of the\nport struct, and carry it over between invocations.\n\nReset the fragment counter only right after calling\nnapi_gro_frags(), on error (after calling napi_free_frags())\nor if stopping the port.\n\nReset it in some place where not strictly necessary just to\nemphasize what is going on.\n\nThis was found by Sashiko during normal patch review."}],"metrics":[{"cvssV3_1":{"version":"3.1","vectorString":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H","baseScore":9.8,"baseSeverity":"CRITICAL"}}],"affected":[{"product":"Linux","vendor":"Linux","defaultStatus":"unaffected","repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["drivers/net/ethernet/cortina/gemini.c"],"versions":[{"version":"4d5ae32f5e1e13f7f36d6439ec3257993b9f5b88","lessThan":"df31e3b64455293df1ea89c7da7d5c9bfbcdd253","status":"affected","versionType":"git"},{"version":"4d5ae32f5e1e13f7f36d6439ec3257993b9f5b88","lessThan":"7af1fabdee744b7995fe01b30b77dfc397657cb5","status":"affected","versionType":"git"},{"version":"4d5ae32f5e1e13f7f36d6439ec3257993b9f5b88","lessThan":"75105fcf73f1ce7d9f769aaefec6e6d6645d5ac0","status":"affected","versionType":"git"},{"version":"4d5ae32f5e1e13f7f36d6439ec3257993b9f5b88","lessThan":"78cf08b3be47c28f07008a76c932bad7cdffa9d8","status":"affected","versionType":"git"},{"version":"4d5ae32f5e1e13f7f36d6439ec3257993b9f5b88","lessThan":"7123cf481e21b54eb6adc4cb0d8dc2876aeaee41","status":"affected","versionType":"git"},{"version":"4d5ae32f5e1e13f7f36d6439ec3257993b9f5b88","lessThan":"c373b34877afea61c89e0dd2e38948c624249b9b","status":"affected","versionType":"git"},{"version":"4d5ae32f5e1e13f7f36d6439ec3257993b9f5b88","lessThan":"46806096f35b8d3dfa2f321ddd77f597edcdb85f","status":"affected","versionType":"git"},{"version":"4d5ae32f5e1e13f7f36d6439ec3257993b9f5b88","lessThan":"ebd8ec2b309e3a447851b456ccaf8fb39f3661e7","status":"affected","versionType":"git"}]},{"product":"Linux","vendor":"Linux","defaultStatus":"affected","repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["drivers/net/ethernet/cortina/gemini.c"],"versions":[{"version":"4.16","status":"affected"},{"version":"0","lessThan":"4.16","status":"unaffected","versionType":"semver"},{"version":"5.10.258","lessThanOrEqual":"5.10.*","status":"unaffected","versionType":"semver"},{"version":"5.15.209","lessThanOrEqual":"5.15.*","status":"unaffected","versionType":"semver"},{"version":"6.1.175","lessThanOrEqual":"6.1.*","status":"unaffected","versionType":"semver"},{"version":"6.6.142","lessThanOrEqual":"6.6.*","status":"unaffected","versionType":"semver"},{"version":"6.12.92","lessThanOrEqual":"6.12.*","status":"unaffected","versionType":"semver"},{"version":"6.18.34","lessThanOrEqual":"6.18.*","status":"unaffected","versionType":"semver"},{"version":"7.0.11","lessThanOrEqual":"7.0.*","status":"unaffected","versionType":"semver"},{"version":"7.1","lessThanOrEqual":"*","status":"unaffected","versionType":"original_commit_for_fix"}]}],"cpeApplicability":[{"nodes":[{"operator":"OR","negate":false,"cpeMatch":[{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"4.16","versionEndExcluding":"5.10.258"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"4.16","versionEndExcluding":"5.15.209"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"4.16","versionEndExcluding":"6.1.175"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"4.16","versionEndExcluding":"6.6.142"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"4.16","versionEndExcluding":"6.12.92"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"4.16","versionEndExcluding":"6.18.34"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"4.16","versionEndExcluding":"7.0.11"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"4.16","versionEndExcluding":"7.1"}]}]}],"references":[{"url":"https://git.kernel.org/stable/c/df31e3b64455293df1ea89c7da7d5c9bfbcdd253"},{"url":"https://git.kernel.org/stable/c/7af1fabdee744b7995fe01b30b77dfc397657cb5"},{"url":"https://git.kernel.org/stable/c/75105fcf73f1ce7d9f769aaefec6e6d6645d5ac0"},{"url":"https://git.kernel.org/stable/c/78cf08b3be47c28f07008a76c932bad7cdffa9d8"},{"url":"https://git.kernel.org/stable/c/7123cf481e21b54eb6adc4cb0d8dc2876aeaee41"},{"url":"https://git.kernel.org/stable/c/c373b34877afea61c89e0dd2e38948c624249b9b"},{"url":"https://git.kernel.org/stable/c/46806096f35b8d3dfa2f321ddd77f597edcdb85f"},{"url":"https://git.kernel.org/stable/c/ebd8ec2b309e3a447851b456ccaf8fb39f3661e7"}],"title":"net: ethernet: cortina: Carry over frag counter","x_generator":{"engine":"bippy-1.2.0"}}}}