CVE record · CVE-2026-89662

NFSD: Prevent lock owner use-after-free during client teardown

CVSS 9.8 CriticalCriticalEPSS 0.0069 · 53rd percentile

Critical, because:

CVSS score 9.8: 9.0 or more.

Published by the CVE Program (CNA: Linux) at 11 Sept 2026, 19:45 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 68ef3bc3166468678d5e1fdd216628c35bd1186f to before 42d7954b0a1907d4ef122aef94561952a033cdc3 git affected 68ef3bc3166468678d5e1fdd216628c35bd1186f to before bb38ff8b4dafbbd1781ad37cd96722fdf2cd972a git affected 68ef3bc3166468678d5e1fdd216628c35bd1186f to before b8bad5a11416b26cc7fd4b18fba46d75ff636558 git affected 68ef3bc3166468678d5e1fdd216628c35bd1186f to before 1ce74d1b7770e69735e8f8e509807af4ff9c8ee7 git affected 68ef3bc3166468678d5e1fdd216628c35bd1186f to before a6ead6fff3a7d03e49845f048f7000a2e0d34431 git affected 68ef3bc3166468678d5e1fdd216628c35bd1186f to before 4804c58f73a80d12df1de323bf97a164f6ee8743 git affected 68ef3bc3166468678d5e1fdd216628c35bd1186f to before 8cf4ff0a7c083dd5e0067f517d63979b74b66649 git affected 68ef3bc3166468678d5e1fdd216628c35bd1186f to before 5e2fa29d223a9a1e6a948e40b109d09081d1decd git affected e294c4c2d33b7307a89cdf31bec08a112d6a9297 git affected 797bfd05d4040fbf766198b3cfcc1838002cc890 git affected 0f44e9da465ea259b6c9f31a627f3c50a16e1679 git affected 4.9.91 to before 4.10 semver and 2 more Other versions: unaffected
Linux	Linux	affected 4.16 unaffected before 4.16 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-2026-89662
CNA: Linux
Tags: Linux kernel
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

Score	Rating	CVSS	Vector	Source
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 0.0069, the 53rd 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.