Use-after-free in Linux kernel - CVE-2026-89890
Published: September 17, 2026
Vulnerability identifier: #VU150398
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-2026-89890
CWE-ID: CWE-416
Exploitation vector: Local access
Exploit availability:
No public exploit available
Vulnerability details
The vulnerability allows a local user to compromise confidentiality, integrity, and availability.
The vulnerability exists due to use-after-free in go7007 ALSA PCM callbacks when a capture PCM remains open during V4L2 device release. A local user can retain an open capture PCM during V4L2 device release to compromise confidentiality, integrity, and availability.
Affected software
Linux kernel
How to mitigate CVE-2026-89890
Install security update from vendor's repository.
External References
- https://git.kernel.org/stable/c/0745a59945d927652d892437f9647ed6e87c0677
- https://git.kernel.org/stable/c/1bd456afeb8a515137e567967069fce6f8fcd23e
- https://git.kernel.org/stable/c/1c57d1a3396b2d767d58f10dff09bb397586c714
- https://git.kernel.org/stable/c/1c9fdd9465211432d5c0ff70caaec0be245823d5
- https://git.kernel.org/stable/c/29fe4d38fb59ec28ca656cb2dabc2b0f78e78980
- https://git.kernel.org/stable/c/9c4f9628b8558c87903492a777834cc5be14ded3
- https://git.kernel.org/stable/c/b7a0de398ad510426db9c8e96c516ef7abf48b0e
- https://git.kernel.org/stable/c/e6f1a1ac9b8ccabfec548aef0d0d93eaf4dba4f4