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CVE record · CVE-2026-89786

ext4: fix out-of-bounds read in ext4_read_inline_dir()

CVSS 9.1 CriticalCriticalEPSS 0.0070 · 53rd 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 16 Sept 2026, 08:48 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 c4d8b0235aa98f8c26bf94d308be3fdd24154572 to before d1e7c186555ad65554fd2f2b02f5a539aa35ae48 git
  • affected c4d8b0235aa98f8c26bf94d308be3fdd24154572 to before 5fd20d4e50dd6e460b3ea8e4396f8553d4526f8f git
  • affected c4d8b0235aa98f8c26bf94d308be3fdd24154572 to before 1a1dea633b724a1c042dbcdb1fed27f410916688 git
  • affected c4d8b0235aa98f8c26bf94d308be3fdd24154572 to before b060861f662d4826dc700a1c3584243bb3474cfe git
  • affected c4d8b0235aa98f8c26bf94d308be3fdd24154572 to before 6702c7da86d8cdb88d0fc57166286e115ffeb8c0 git
  • affected c4d8b0235aa98f8c26bf94d308be3fdd24154572 to before 36bf17bb90cdf7a623499b624b05acde4d2feef5 git
  • affected c4d8b0235aa98f8c26bf94d308be3fdd24154572 to before 9333cc809f0a89e001b814155a6cb8903a6274df git
Other versions: unaffected
Linux Linux
  • affected 3.10
  • unaffected before 3.10 semver
  • unaffected 5.15.221 to 5.15.*, inclusive semver
  • unaffected 6.1.188 to 6.1.*, inclusive semver
  • unaffected 6.6.157 to 6.6.*, inclusive semver
  • unaffected 6.12.110 to 6.12.*, inclusive semver
  • unaffected 6.18.52 to 6.18.*, inclusive semver
  • unaffected 7.2.6 to 7.2.*, inclusive semver
  • unaffected 7.3 to *, inclusive original_commit_for_fix
Other versions: affected
Identifiers
CVE-2026-89786
CNA
Linux
Tags
Published
16 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 0.0070, the 53rd 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 16 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.