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CVE record · CVE-2026-80976

seg6: reset IP6CB after IPv6 decapsulation

CVSS 9.8 CriticalCriticalEPSS 0.0071 · 54th 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, 19:42 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 d7a669dd2f8ba07a17423f4ad586dfc0379882f7 to before d1f0d353358987ca87f21d8956e2d2854951130d git
  • affected d7a669dd2f8ba07a17423f4ad586dfc0379882f7 to before a0e2b0a3718f0cf9fb0ee41710b4a6348a7315c8 git
  • affected d7a669dd2f8ba07a17423f4ad586dfc0379882f7 to before 9ae92198c24d7dacd4070e2f34f6e1ed3a63061c git
  • affected d7a669dd2f8ba07a17423f4ad586dfc0379882f7 to before 96c74420ac92930a7e0f21770818544eee4a93d7 git
  • affected d7a669dd2f8ba07a17423f4ad586dfc0379882f7 to before 2b154e96fcb3f01fd42765c64e0a56820fbc16eb git
  • affected d7a669dd2f8ba07a17423f4ad586dfc0379882f7 to before cfa186a0857a0f831dfca67b16bbc40ecfdf3280 git
  • affected d7a669dd2f8ba07a17423f4ad586dfc0379882f7 to before c73fb911e02b9a766c950bc9707f3e3a96ffd702 git
  • affected d7a669dd2f8ba07a17423f4ad586dfc0379882f7 to before f967455fb2a5a2079b9eb5823e9ccf359174bf9f git
Other versions: unaffected
Linux Linux
  • affected 4.14
  • unaffected before 4.14 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-2026-80976
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 0.0071, the 54th 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.