Connect your agent
AdvisoriesCriticalCheck your lockfilePluginHow it worksPricing Connect your agent

CVE record · CVE-2026-89551

SUNRPC: xdr_buf_trim: clamp buf->len to avoid underflow

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 4c190e2f913f038c9c91ee63b59cd037260ba353 to before a3d77bcd974b8625d16bddf448cb3a1b5e37049c git
  • affected 4c190e2f913f038c9c91ee63b59cd037260ba353 to before fa16bbe987b47e771e52eeb1b4540f18d92496ac git
  • affected 4c190e2f913f038c9c91ee63b59cd037260ba353 to before a924ac4c78afab71bf82641afa3b62e0c4a8b55e git
  • affected 4c190e2f913f038c9c91ee63b59cd037260ba353 to before 4bf59cb0ea5b0ddfbc46a1dc2fa78fc8b9986ce4 git
  • affected 4c190e2f913f038c9c91ee63b59cd037260ba353 to before e6267cccd7b05cc514e57f2160aa8db85f5c2701 git
  • affected 4c190e2f913f038c9c91ee63b59cd037260ba353 to before ad0cce80d4af2f74674e8b635d97aa3880e83da8 git
  • affected 4c190e2f913f038c9c91ee63b59cd037260ba353 to before 85e9602650e9df07190abe817cee3b4d9bc3df17 git
  • affected 4c190e2f913f038c9c91ee63b59cd037260ba353 to before 3f491306dcb673ff5e78e1044ba450c58978774e git
Other versions: unaffected
Linux Linux
  • affected 3.9
  • unaffected before 3.9 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-2026-89551
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.