CVE record · CVE-2026-90044

usb: gadget: f_fs: Fix Use-After-Free in AIO error path

CVSS 7.8 HighEPSS 0.0017 · 6th percentile

Published by the CVE Program (CNA: Linux) at 16 Sept 2026, 10:33 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 de2080d41b5d584205e408d72021f0f335a046fc to before 922a29e1f8573fd405eea1a73a52112c4e7fcfc4 git affected de2080d41b5d584205e408d72021f0f335a046fc to before 0a2f71ccf9c2053de725e9a7922d081f3f3a3804 git affected de2080d41b5d584205e408d72021f0f335a046fc to before b5f0e80a03e87bd932487e03248eae3ba3ed7b45 git affected de2080d41b5d584205e408d72021f0f335a046fc to before 153b5ecd29ed055562400bc17c91df3fd869b0ce git affected de2080d41b5d584205e408d72021f0f335a046fc to before 4a2fb2d12b87b43724230abb52a1440617c7b6cc git affected de2080d41b5d584205e408d72021f0f335a046fc to before e78dcb1f7ec271449c54984dc90c62a5ba272de7 git Other versions: unaffected
Linux	Linux	affected 4.0 unaffected before 4.0 semver unaffected 6.1.191 to 6.1., inclusive semver unaffected 6.6.160 to 6.6., inclusive semver unaffected 6.12.111 to 6.12., inclusive semver unaffected 6.18.51 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-2026-90044
CNA: Linux
Tags: Linux kernel
Published: 16 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 USB gadget FunctionFS (f_fs) driver is affected starting with 4.0, and the fixed stable releases are 6.1.191, 6.6.160, 6.12.111, and 6.18.51 or later in each series. A local user who can issue asynchronous I/O on a FunctionFS endpoint can race a cancel request against an error path, causing a use-after-free. Upgrade to a fixed version; the source lists no workaround.

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
7.8	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 0.0017, the 6th 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 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.