NULL pointer dereference in Linux kernel - CVE-2026-89874
Published: September 17, 2026
Vulnerability identifier: #VU150414
CSH Severity: Low
CVSS v4: 4.8 [CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N]
CVE-ID: CVE-2026-89874
CWE-ID: CWE-476
Exploitation vector: Local access
Exploit availability:
No public exploit available
Vulnerability details
The vulnerability allows a local user to cause a denial of service.
The vulnerability exists due to a null pointer dereference in v4l2_async_match_notify() in the v4l2-async subsystem when ancillary media link creation fails. A local user can trigger ancillary media link creation failure to cause a denial of service.
Affected software
Linux kernel
How to mitigate CVE-2026-89874
Install security update from vendor's repository.
External References
- https://git.kernel.org/stable/c/3345746e0957bce6c53644838e4955710a82a962
- https://git.kernel.org/stable/c/47d82b605351c0e04f6365e42c8ffe2fcfdba615
- https://git.kernel.org/stable/c/a57d94026cb4fd7b3d258f0db2ad391cbccfaba5
- https://git.kernel.org/stable/c/caac13f518d83974e9884d1eeda3d4cc3bb92978
- https://git.kernel.org/stable/c/d273571e531405426983c6a45ec635c7d0415eed