CVE record · CVE-2026-90149

NFSv4/flexfiles: fix NULL dereference for NFSv4.0 data servers

CVSS 7.5 HighEPSS 0.0066 · 52nd percentile

Published by the CVE Program (CNA: Linux) at 17 Sept 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 a7878ca140084ec267ede48fce64d7e60f6d873e to before e55d7fec8a9290f73032ee34c35dd68532809633 git affected a7878ca140084ec267ede48fce64d7e60f6d873e to before 336b6da10021c69a8f273bbacdf7432fdc89a06f git affected a7878ca140084ec267ede48fce64d7e60f6d873e to before 5527af72b0100c94287bfec901b6313eeac567ca git affected a7878ca140084ec267ede48fce64d7e60f6d873e to before 163c16e01f53fc8eb8d0f3484ae6c382265ecbbd git affected a7878ca140084ec267ede48fce64d7e60f6d873e to before 436a214514e24103159aea455147d58b44a8a585 git affected a7878ca140084ec267ede48fce64d7e60f6d873e to before 2b03ebbf8d5e8f6af4ecd6c65375232dd1ec32cc git Other versions: unaffected
Linux	Linux	affected 4.12 unaffected before 4.12 semver unaffected 6.1.191 to 6.1., inclusive semver unaffected 6.6.160 to 6.6., inclusive semver unaffected 6.12.114 to 6.12., inclusive semver unaffected 6.18.52 to 6.18., inclusive semver unaffected 7.2.6 to 7.2., inclusive semver unaffected 7.3 to , inclusive original_commit_for_fix Other versions: affected

Identifiers: CVE-2026-90149
CNA: Linux
Tags: Linux kernel
Published: 17 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 NFSv4 flexfiles client is affected from 4.12 until fixed when it uses NFSv4.0 data servers. I/O to such a data server can trigger a NULL pointer dereference and kernel oops. The source gives few details on what access an attacker needs. Upgrade to 6.1.191, 6.6.160, 6.12.114, or 6.18.52, 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
7.5	High	3.1	CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H	CNA (Linux)

CISA KEV Not listed.
EPSS 0.0066, the 52nd percentile, on 13 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 17 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.