PT-2026-38947 · Linux · Linux Kernel

Published 2026-05-08 · Updated 2026-05-15 · CVE-2026-43305

Positive Technologies (AI Summary)

CVSS v3.1

5.5

Medium

Base vector

AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

Name of the Vulnerable Software and Affected Versions Linux kernel (affected versions not specified)

Description A mismatched unlock for the DMUB HW lock in the HWSS fast path occurs in the Linux kernel. This happens because the evaluation for whether the DMUB HW lock is required differs from the evaluation for whether it needs to be unlocked, which can lead to a system hang when the fast path is used for ASICs without FAMS support.

Recommendations At the moment, there is no information about a newer version that contains a fix for this vulnerability.

Improper Locking

Weakness Enumeration

CWE-667

Related Identifiers

CVE-2026-43305

Affected Products

Linux Kernel

References · 13

• https://cve.org/CVERecord?id=CVE-2026-43305 · Security Note
• https://osv.dev/vulnerability/DEBIAN-CVE-2026-43305 · Vendor Advisory
• https://security-tracker.debian.org/tracker/CVE-2026-43305 · Vendor Advisory
• https://osv.dev/vulnerability/UBUNTU-CVE-2026-43305 · Vendor Advisory
• https://git.kernel.org/stable/c/4e387ad67efb100b645630ffbce7716786f52283 · Patch
• https://nvd.nist.gov/vuln/detail/CVE-2026-43305 · Security Note
• https://ubuntu.com/security/CVE-2026-43305 · Vendor Advisory
• https://git.kernel.org/stable/c/af3303970da5ce5bfe6dffdd07f38f42aad603e0 · Patch
• https://t.me/cveNotify/163615 · Telegram Post
• https://twitter.com/windowsforum/status/2053770128295108753 · Twitter Post
• https://twitter.com/hetmehtaa/status/2055151398283837677 · Twitter Post
• https://twitter.com/CVEnew/status/2053174637215805824 · Twitter Post
• https://git.kernel.org/linus/af3303970da5ce5bfe6dffdd07f38f42aad603e0 · Note