Connect your agent
AdvisoriesCriticalCheck your lockfilePluginHow it worksPricing Connect your agent

CVE record · CVE-2026-80603

netfilter: nf_conntrack_irc: fix parse_dcc() off-by-one OOB read

CVSS 9.1 CriticalCriticalEPSS 0.0060 · 49th 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 28 Aug 2026, 06:48 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 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 to before abb8c32b88ea3f46beb68c34fe9a3ac8ed664e7e git
  • affected 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 to before 437e0a3854b3a44ec15afa9ab88ec215adf3a2fd git
  • affected 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 to before 910c33e4a8c046c3cc1fa5a465a4d41a1bb398f1 git
  • affected 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 to before 2b70f61f569bb29acb380e6f616a1bbdee15668f git
  • affected 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 to before 2393f0bd7a467ad475598f3a5b9de27ca36e3037 git
  • affected 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 to before aff589556ed772cb1c0c2d7b4d91ec45c0c39416 git
  • affected 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 to before eeef3b81f449560653662df2dde6f6fe247c5365 git
  • affected 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 to before ef6400ca25a13fd6dedbe8ef4a1d0979bbbfe88a git
Other versions: unaffected
Linux Linux
  • affected 2.6.12
  • unaffected before 2.6.12 semver
  • unaffected 5.10.261 to 5.10.*, inclusive semver
  • unaffected 5.15.212 to 5.15.*, inclusive semver
  • unaffected 6.1.178 to 6.1.*, inclusive semver
  • unaffected 6.6.145 to 6.6.*, inclusive semver
  • unaffected 6.12.97 to 6.12.*, inclusive semver
  • unaffected 6.18.40 to 6.18.*, inclusive semver
  • unaffected 7.1.5 to 7.1.*, inclusive semver
  • unaffected 7.2 to *, inclusive original_commit_for_fix
Other versions: affected
Identifiers
CVE-2026-80603
CNA
Linux
Tags
Published
28 Aug 2026
Updated
16 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:H/A:N CNA (Linux)
  • CISA KEV Not listed.
  • EPSS 0.0060, the 49th percentile, on 15 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 28 Aug 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.