Race condition in Linux kernel - CVE-2026-89979
Published: September 16, 2026
Vulnerability identifier: #VU150313
CSH Severity: Low
CVSS v4: 8.5 [CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N]
CVE-ID: CVE-2026-89979
CWE-ID: CWE-362
Exploitation vector: Local access
Exploit availability:
No public exploit available
Vulnerability details
The vulnerability allows a local user to cause inconsistent PCM state transitions.
The vulnerability exists due to a race condition in ALSA PCM trigger-start handling when concurrently performing non-atomic PCM operations. A local user can concurrently issue a PCM start trigger and non-atomic PCM operations to cause inconsistent PCM state transitions.
Affected software
Linux kernel
How to mitigate CVE-2026-89979
Install security update from vendor's repository.
External References
- https://git.kernel.org/stable/c/50afadf1ea66597116eb14e73c24da7ae99b759f
- https://git.kernel.org/stable/c/5abeb4f9f2023f001d693b4e5e1ebbf25e25d0eb
- https://git.kernel.org/stable/c/7ad2ea7c10044b08ecf7b04376916faf12e17a99
- https://git.kernel.org/stable/c/acac7b5e07349a9d10d78873afb4b93cd1dc721f
- https://git.kernel.org/stable/c/ad29779736cfd6f5595f0cab300dd7611418e363
- https://git.kernel.org/stable/c/b1d12144557fceed5de6e22e2c2e30a40ed37702
- https://git.kernel.org/stable/c/b2edc017f94c08bdd0b046a586e43ac771a2f942
- https://git.kernel.org/stable/c/b599e7f16441386754ec083fa62a549bccb02fca