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CVE record · CVE-2026-89536

SUNRPC: wait for in-flight client TLS handshake callback

CVSS 9.8 CriticalCriticalEPSS 0.0063 · 51st 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 75eb6af7acdf566c68d61e98e67ee2f235201c02 to before fb43997407bc17ee39bac81ab708101312e255f5 git
  • affected 75eb6af7acdf566c68d61e98e67ee2f235201c02 to before 15431820f448e09f8029b670d5c82aa5917d4625 git
  • affected 75eb6af7acdf566c68d61e98e67ee2f235201c02 to before 1de391e8b94e31b45c19c16dbf315e294810c7de git
  • affected 75eb6af7acdf566c68d61e98e67ee2f235201c02 to before 7fbb6d2ab0391eb8d1f1a68e6bc263ef02cea61b git
  • affected 75eb6af7acdf566c68d61e98e67ee2f235201c02 to before a89dd597458848b463d284b15e42a8078beeb046 git
Other versions: unaffected
Linux Linux
  • affected 6.5
  • unaffected before 6.5 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-2026-89536
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 0.0063, the 51st 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.