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CVE record · CVE-2026-89542

SUNRPC: harden gss_krb5_unwrap_v2 against short tokens

CVSS 9.8 CriticalCriticalEPSS 0.0051 · 44th 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, 19:44 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 de9c17eb4a912c9028f7b470eb80815144883b26 to before 299d281c7225ded15b28cb861a98d818d82787fc git
  • affected de9c17eb4a912c9028f7b470eb80815144883b26 to before 84ddbc8d084c0251d534f14f5d1a7da05be56404 git
  • affected de9c17eb4a912c9028f7b470eb80815144883b26 to before 075d7cfc4df8c54cb202ba8b28420370c03ba9b6 git
  • affected de9c17eb4a912c9028f7b470eb80815144883b26 to before f2591660e0eb263c9415bf0d0bb1b111e62df7a4 git
  • affected de9c17eb4a912c9028f7b470eb80815144883b26 to before dddcb0f4b7e27fac16a78ea9a1c8ec2e8a241087 git
  • affected de9c17eb4a912c9028f7b470eb80815144883b26 to before 806584a4b67a7233870c33e5b8f872e76dd02988 git
  • affected de9c17eb4a912c9028f7b470eb80815144883b26 to before a7894e10572d53eb10109b8d07459cc8d3435811 git
  • affected de9c17eb4a912c9028f7b470eb80815144883b26 to before 6959297aaa9572783d620a226d73c3fb94494888 git
Other versions: unaffected
Linux Linux
  • affected 2.6.35
  • unaffected before 2.6.35 semver
  • unaffected 5.10.270 to 5.10.*, inclusive 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 6.12.109 to 6.12.*, inclusive semver
  • unaffected 6.18.50 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-2026-89542
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 0.0051, the 44th 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.