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CVE record · CVE-2026-80926

ksmbd: fix use-after-free in oplock break notification

CVSS 9.8 CriticalCriticalEPSS 0.0044 · 39th percentile

Critical, because:

  • CVSS score 9.8: 9.0 or more.

How we decide what’s critical

Published by the CVE Program (CNA: Linux) at 11 Sept 2026, 19:37 UTC. agentprime has not analysed this yet, so whether it affects any app is not known. This CVE names a vendor and product rather than a package, so the lockfile check doesn’t match it.

Affected products, as the CNA wrote them
VendorProductVersions
Linux Linux
  • affected 945a86b21b40fb17183f5b27461baa6f03e2467f to before 892f643b141aee3f7aa7c0fc61ddcb55c59f1996 git
  • affected 1ff58dcfcab434ebb51649da33774fbb8e1f7b67 to before 5de0527f782430b1109a447646e32033ad018a6a git
  • affected e735dbd489e3ea02be78dba991056fe1138be51e to before c8279ae8df68cce9cd3b785e85f7a86c80a46e78 git
  • affected b003086d76968298f22e7cf62239833b5a3a06b1 to before 8cc98db4fc590e6c7d9db6529320982ee16c5d1d git
  • affected b003086d76968298f22e7cf62239833b5a3a06b1 to before 0e753899627b5e28a9fea8bca98262a6f65a2452 git
  • affected 75e33deda658c1ab3a9336cbdb1436536f9b3660 git
  • affected 6.6.143 to before 6.6.158 semver
  • affected 6.12.94 to before 6.12.111 semver
  • affected 6.18.36 to before 6.18.51 semver
  • affected 7.0.13 to before 7.1 semver
Other versions: unaffected
Linux Linux
  • affected 7.1
  • unaffected before 7.1 semver
  • unaffected 6.6.158 to 6.6.*, inclusive semver
  • unaffected 6.12.111 to 6.12.*, inclusive semver
  • unaffected 6.18.51 to 6.18.*, inclusive semver
  • unaffected 7.2.5 to 7.2.*, inclusive semver
  • unaffected 7.3 to *, inclusive original_commit_for_fix
Other versions: affected
Identifiers
CVE-2026-80926
CNA
Linux
Tags
Published
11 Sept 2026
Updated
19 Oct 2026

Not analysed yet

We haven’t published our own analysis of this CVE. If a person reviews it, this page will say what’s affected and what has to be true for it to matter.

Severity and exploitation

ScoreRatingCVSSVectorSource
9.8 Critical 3.1 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H CNA (Linux)
  • CISA KEV Not listed.
  • EPSS 0.0044, the 39th percentile, on 14 Nov 2026: FIRST’s estimate of the chance of exploitation in the next 30 days.

Timeline

This record came from the full history of the CVE Program, published 11 Sept 2026. New records show when each source confirmed them.

Sources

References from the CNA

Facts on this page come from the CVE List as the CNA published them, with CVSS from the sources named above, CISA KEV and FIRST EPSS. Vendors, products and versions are shown as the CNA wrote them. We don’t reproduce the CVE’s description.