CVE record · CVE-2026-89791

perf: Fix use-after-free when perf mmap() revival races with the last munmap()

CVSS 7.8 HighEPSS 0.0018 · 8th percentile

Published by the CVE Program (CNA: Linux) at 16 Sept 2026, 08:48 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
Vendor	Product	Versions
Linux	Linux	affected 59741451b49ce9964a9758c19d6f7df2a1255c75 to before 929cb3b9dc818dd9fa89d510d4ff2b255e42badd git affected 59741451b49ce9964a9758c19d6f7df2a1255c75 to before 0c739f54f1c77f3a4643160cd2e031b6c2f2aab6 git affected 59741451b49ce9964a9758c19d6f7df2a1255c75 to before 58a8108bc73de0740d5b88150465d6690ea5f85f git Other versions: unaffected
Linux	Linux	affected 6.18 unaffected before 6.18 semver unaffected 6.18.52 to 6.18., inclusive semver unaffected 7.2.5 to 7.2., inclusive semver unaffected 7.3 to *, inclusive original_commit_for_fix Other versions: affected

Identifiers: CVE-2026-89791
CNA: Linux
Tags: Linux kernel
Published: 16 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

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 0.0018, the 8th 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 16 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.