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CVE record · CVE-2026-89630

smb: client: restore the data_offset bound in is_valid_oplock_break()

CVSS 9.1 CriticalCriticalEPSS 0.0054 · 45th percentile

Critical, because:

  • CVSS score 9.1: 9.0 or more.

How we decide what’s critical

Published by the CVE Program (CNA: Linux) at 11 Sept 2026, 19:45 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 83bfbd0bb9025f98fa62b44f93bd67466773d1db to before 5b16a1967a01ad4496a7206a87c3eb16f1df2b05 git
  • affected 83bfbd0bb9025f98fa62b44f93bd67466773d1db to before ba22f575de9deeae4ae0859ca4315a7698226237 git
  • affected 78e718c5aa146063cd70d2cc68297c3ac41f31ee git
  • affected 6.18.56 to before 6.19 semver
Other versions: unaffected
Linux Linux
  • affected 6.19
  • unaffected before 6.19 semver
  • unaffected 7.2.4 to 7.2.*, inclusive semver
  • unaffected 7.3 to *, inclusive original_commit_for_fix
Other versions: affected
Identifiers
CVE-2026-89630
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
9.1 Critical 3.1 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:H CNA (Linux)
  • CISA KEV Not listed.
  • EPSS 0.0054, the 45th 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.