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CVE record · CVE-2026-99233

tracing/histograms: Verify event_call identity when updating synth_event refcount

CVSS 7.8 HighEPSS 0.0012 · 1st percentile

Published by the CVE Program (CNA: Linux) at 2 Nov 2026, 16:06 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 4b147936fa509650beaf638b331573c23ba4d609 to before 381f543ed35c434d5b707369aa5dcd69ecf440af git
  • affected 4b147936fa509650beaf638b331573c23ba4d609 to before 4472579bd1c83708b6fe623c870cdf728e947205 git
  • affected 4b147936fa509650beaf638b331573c23ba4d609 to before 23b4106e8b35823acc79e206c7745f55b9cfd78b git
  • affected 4b147936fa509650beaf638b331573c23ba4d609 to before 06e816bed499fe47f39f12044382cc5d064485fb git
  • affected 4b147936fa509650beaf638b331573c23ba4d609 to before 5597bb8db6855fcb97a67196d227fea359bcd81c git
  • affected 4b147936fa509650beaf638b331573c23ba4d609 to before cf4e31d5da80fae4c9cdbe7af55b7c3ad213f0e4 git
  • affected 4b147936fa509650beaf638b331573c23ba4d609 to before 3403d9bb27ebc3572bd048620746b4414e073bf9 git
Other versions: unaffected
Linux Linux
  • affected 4.17
  • unaffected before 4.17 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 6.18.60 to 6.18.*, inclusive semver
  • unaffected 7.2.14 to 7.2.*, inclusive semver
  • unaffected 7.3.1 to 7.3.*, inclusive semver
  • unaffected 7.4-rc1 to *, inclusive original_commit_for_fix
Other versions: affected
Identifiers
CVE-2026-99233
CNA
Linux
Tags
Published
2 Nov 2026
Updated
3 Nov 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 0.0012, the 1st percentile, on 5 Nov 2026: FIRST’s estimate of the chance of exploitation in the next 30 days.

Timeline

  1. 2 Nov 2026, 16:06 UTC Confirmed by the CVE List
  2. 2 Nov 2026, 16:12 UTC First seen by agentprime
  3. 2 Nov 2026, 16:17 UTC Confirmed by NVD

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.