CVE-2026-98653: Linux vulnerability

CVE-2026-98653: KVM: s390: Fix _gaccess_shadow_fault()

In the Linux kernel, the following vulnerability has been resolved: KVM: s390: Fix _gaccess_shadow_fault() In some circumstances, it is possible that the page of nested guest memory that is being shadowed is not present at all in the parent guest gmap. dat_entry_walk() will not find any leaf entry and return with -ENOENT, which will erroneously be propagated all the way to userspace. Fix by manually calling gmap_link() on the memory of the nested guest that is being shadowed if the mapping was not already present.

UnknownCVSS not scoredNot KEV-listedUpdatedOct 18, 2026, 15:20 UTC (UTC+00:00)

Potential ATT&CK relevance

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Vulnerability profileCVE Program record

Severity: Unknown
CVSS: Not scored
Known Exploited: No
Published: Oct 18, 2026, 15:20 UTC (UTC+00:00)

Official CVE source material

CNA and ADP enrichment extracted from CVE v5

These fields come from the CVE record and ADP containers, not from Glexia's Take. They preserve time-varying source decisions such as CISA SSVC, KEV status, CVSS metrics, and provider references.

0CVSS vectors

3Timeline events

0ADP providers

3Source links

Vulnerability timeline

Timeline events are normalized from CVE metadata, CNA source timelines, ADP timelines, and KEV metadata when present.

CVE reservedCVE Program
The CVE ID was reserved by the assigning CNA.
Sep 25, 2026, 10:25 UTC (UTC+00:00)
CVE publishedCVE Program
The CVE record was published.
Oct 18, 2026, 15:20 UTC (UTC+00:00)
CVE updatedCVE Program
The CVE record metadata indicates this as the latest update time.
Oct 18, 2026, 15:20 UTC (UTC+00:00)

Source materials

CVE List V5 sourceCVE List V5
https://git.kernel.org/stable/c/94c43c7df46433ed4d1e18f13770b019ba977bd8CVE reference, Linux
https://git.kernel.org/stable/c/faff4c8ff3dbec6d71b89dd281a0d17c4478fa44CVE reference, Linux

Affected products

Products and packages named in the record

VendorProductVersion / packageStatus

LinuxLinuxe38c884df92119d96f652d51f82661dd2fc0b885, e38c884df92119d96f652d51f82661dd2fc0b885unaffected

LinuxLinux7.0, 0, 7.2.9, 7.3-rc5affected

Weakness

CWE details

No CWE listed

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