CVE record · CVE-2026-89671

nfsd: gate nfs3 setacl by argp->mask

CVSS 9.1 CriticalCriticalEPSS 0.0054 · 46th percentile

Critical, because:

CVSS score 9.1: 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 a257cdd0e2179630d3201c32ba14d7fcb3c3a055 to before beeb33152873ad40692bd255b562966f8ba43dbd git affected a257cdd0e2179630d3201c32ba14d7fcb3c3a055 to before 3be1d8611dae4829e4608007db29f4a8748c37b2 git affected a257cdd0e2179630d3201c32ba14d7fcb3c3a055 to before 68a80b26efdff1d09f8ae1773c6a915abb9e191d git affected a257cdd0e2179630d3201c32ba14d7fcb3c3a055 to before b3bff820d068ea59767d4e91a3258231a879da5f git affected a257cdd0e2179630d3201c32ba14d7fcb3c3a055 to before ff99ed007f065198fd723152405c22aa558f700b git affected a257cdd0e2179630d3201c32ba14d7fcb3c3a055 to before 453d7198a0ab07a12d46e0575861ac7b932da17e git Other versions: unaffected
Linux	Linux	affected 2.6.13 unaffected before 2.6.13 semver unaffected 6.1.191 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-2026-89671
CNA: Linux
Tags: Linux kernel
Published: 11 Sept 2026
Updated: 30 Oct 2026

Machine-written summary

Summary written by Claude Haiku from the source advisory. Not reviewed by a person.

The Linux kernel NFS server (nfsd) is affected in its NFSv3 SETACL handling, from version 2.6.13 until fixed. A client able to send NFSv3 SETACL requests can silently remove a directory's default ACL, or both ACLs. Upgrade to Linux kernel 6.1.191, 6.6.157, 6.12.109, 6.18.50, or a later release in those series.

Written 12 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
9.1	Critical	3.1	CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N	CNA (Linux)

CISA KEV Not listed.
EPSS 0.0054, the 46th 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.