CVE record · CVE-2026-99227

io_uring/waitid: prevent cancel reference wrap

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
Vendor	Product	Versions
Linux	Linux	affected f31ecf671ddc498f20219453395794ff2383e06b to before 20b67288574c7c3df6b8ea7ed3b7af90a868006f git affected f31ecf671ddc498f20219453395794ff2383e06b to before 5bfeee1774791602a0d53eb717f00f172127a017 git affected f31ecf671ddc498f20219453395794ff2383e06b to before 857aa2012b91cad6fdef54a4b6c632d9d0b6e64f git affected f31ecf671ddc498f20219453395794ff2383e06b to before 22fb4a4518e305164c7f203608287564de292f34 git affected f31ecf671ddc498f20219453395794ff2383e06b to before 98787d3fa4e99564d2b2bc21255b21f670c450d0 git Other versions: unaffected
Linux	Linux	affected 6.7 unaffected before 6.7 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-2026-99227
CNA: Linux
Tags: Linux kernel
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

Score	Rating	CVSS	Vector	Source
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

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