CVE-2026-20731

Name	CVE-2026-20731
Description	Improper buffer restrictions for the Intel(R) NPU Driver for all versions within Ring 3: User Applications may allow a denial of service. Unprivileged software adversary with an authenticated user combined with a low complexity attack may enable denial of service. This result may potentially occur via local access when attack requirements are not present without special internal knowledge and requires no user interaction. The potential vulnerability may impact the confidentiality (none), integrity (low) and availability (high) of the vulnerable system, resulting in subsequent system confidentiality (none), integrity (none) and availability (none) impacts.
Source	CVE (at NVD; CERT, ENISA, LWN, oss-sec, fulldisc, Debian ELTS, Red Hat, Ubuntu, Gentoo, SUSE bugzilla/CVE, GitHub advisories/code/issues, web search, more)

Vulnerable and fixed packages

The table below lists information on source packages.

Source Package	Release	Version	Status
firmware-nonfree (PTS)	bullseye/non-free	20210315-3	fixed
	bookworm/non-free-firmware	20230210-5	fixed
	trixie/non-free-firmware	20250410-2	vulnerable
	forky/non-free-firmware, sid/non-free-firmware	20260622-1	fixed

The information below is based on the following data on fixed versions.

Package	Type	Release	Fixed Version
firmware-nonfree	source	bullseye	(not affected)
firmware-nonfree	source	bookworm	(not affected)
firmware-nonfree	source	(unstable)	20260410-1

Notes

[trixie] - firmware-nonfree <no-dsa> (Minor issue)
[bookworm] - firmware-nonfree <not-affected> (VPU firmware not yet present)
[bullseye] - firmware-nonfree <not-affected> (VPU firmware not yet present)
https://www.intel.com/content/www/us/en/security-center/advisory/intel-sa-01456.html
https://gitlab.com/kernel-firmware/linux-firmware/-/commit/6ca0863131571e06cce90bc04e318fc92751890e (20260410)