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CVE record · CVE-2026-99213

vsock: treat TCP_CLOSING as once-established

CVSS 7.8 HighEPSS 0.0013 · 2nd percentile

Published by the CVE Program (CNA: Linux) at 28 Oct 2026, 10:36 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 d021c344051af91f42c5ba9fdedc176740cbd238 to before ea36ef3c229d54b552432d1290aee1d807f67fd5 git
  • affected d021c344051af91f42c5ba9fdedc176740cbd238 to before 5f2ab77028602a22f0cc33cac063a313787cbeae git
  • affected d021c344051af91f42c5ba9fdedc176740cbd238 to before f89770c7365748d9d6a2ae07d1c23497ca21ec07 git
  • affected d021c344051af91f42c5ba9fdedc176740cbd238 to before deb972c7eea8d0bc3109c35c30a1c86d4939f811 git
  • affected d021c344051af91f42c5ba9fdedc176740cbd238 to before baf1b5715640e434249ce7f63f94bd1a00938ef9 git
  • affected d021c344051af91f42c5ba9fdedc176740cbd238 to before c2c5359ef2c33684fa3f3652fd761a483db8d1e7 git
  • affected d021c344051af91f42c5ba9fdedc176740cbd238 to before 44d1ca05d6094a5d75c671a0545249186d790b8d git
  • affected d021c344051af91f42c5ba9fdedc176740cbd238 to before 4f6ac74fa594a918d41255c941256e1d51592d3b git
Other versions: unaffected
Linux Linux
  • affected 3.9
  • unaffected before 3.9 semver
  • unaffected 5.10.273 to 5.10.*, inclusive semver
  • unaffected 5.15.224 to 5.15.*, inclusive semver
  • unaffected 6.1.191 to 6.1.*, inclusive semver
  • unaffected 6.6.161 to 6.6.*, inclusive semver
  • unaffected 6.12.115 to 6.12.*, inclusive semver
  • unaffected 6.18.59 to 6.18.*, inclusive semver
  • unaffected 7.2.13 to 7.2.*, inclusive semver
  • unaffected 7.3 to *, inclusive original_commit_for_fix
Other versions: affected
Identifiers
CVE-2026-99213
CNA
Linux
Tags
Published
28 Oct 2026
Updated
31 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
7.8 High 3.1 CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H CNA (Linux)
  • CISA KEV Not listed.
  • EPSS 0.0013, the 2nd percentile, on 5 Nov 2026: FIRST’s estimate of the chance of exploitation in the next 30 days.

Timeline

  1. 28 Oct 2026, 10:36 UTC Confirmed by the CVE List

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.