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CVE record · CVE-2026-89492

ocfs2: validate directory-index entry counts when reading metadata

CVSS 9.8 CriticalCriticalEPSS 0.0071 · 54th 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, 19:43 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 9b7895efac906d66d19856194e1ba61f37e231a4 to before 3f28574dd59672ac47f3110c9a8ead703ec021c0 git
  • affected 9b7895efac906d66d19856194e1ba61f37e231a4 to before 3497aa757788de5d904f41814f1df0b292a8be09 git
  • affected 9b7895efac906d66d19856194e1ba61f37e231a4 to before 47b8152ed7709f7ef30b398fb0bfe4b452dd0495 git
  • affected 9b7895efac906d66d19856194e1ba61f37e231a4 to before aad3129b8e915d0ff492bb7517d825d8490cfdd9 git
  • affected 9b7895efac906d66d19856194e1ba61f37e231a4 to before 5e661f55ca8568471fce558effe81cca112f5cb2 git
  • affected 9b7895efac906d66d19856194e1ba61f37e231a4 to before fcfcba8fe17dbf2c8805690b8cc25e32d81249a4 git
  • affected 9b7895efac906d66d19856194e1ba61f37e231a4 to before b8a5c0c32df2c5b685ceef76ac77e37c7e1dc3ed git
  • affected 9b7895efac906d66d19856194e1ba61f37e231a4 to before bc70726ddad53c7e9a9a85915bf2415b0d4f42f9 git
Other versions: unaffected
Linux Linux
  • affected 2.6.30
  • unaffected before 2.6.30 semver
  • unaffected 5.10.273 to 5.10.*, inclusive semver
  • unaffected 5.15.224 to 5.15.*, inclusive semver
  • unaffected 6.1.191 to 6.1.*, inclusive semver
  • unaffected 6.6.160 to 6.6.*, inclusive semver
  • unaffected 6.12.111 to 6.12.*, inclusive semver
  • unaffected 6.18.51 to 6.18.*, inclusive semver
  • unaffected 7.2.4 to 7.2.*, inclusive semver
  • unaffected 7.3 to *, inclusive original_commit_for_fix
Other versions: affected
Identifiers
CVE-2026-89492
CNA
Linux
Tags
Published
11 Sept 2026
Updated
30 Oct 2026

Machine-written summary

Summary written by Claude Haiku from the source advisory. Not reviewed by a person.

The Linux kernel's ocfs2 filesystem code, from 2.6.30 onward, can read past the end of directory-index metadata blocks. An attacker who can get a crafted ocfs2 image mounted can trigger this by accessing an indexed directory, causing an out-of-bounds memory read. Upgrade to 5.10.273, 5.15.224, 6.1.191, 6.6.160, or a later release in those stable series.

Written 12 Nov 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 0.0071, the 54th 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.