SB2026091792 - NULL pointer dereference in Linux kernel media v4l2-core driver
Published: September 17, 2026
Security Bulletin ID
SB2026091792
CSH Severity
Low
Patch available
YES
Number of vulnerabilities
1
Exploitation vector
Local access
Highest impact
Partial DoS
Breakdown by Severity
- Low
- Medium
- High
- Critical
Description
This security bulletin contains information about 1 vulnerability.
1) NULL pointer dereference (CVE-ID: CVE-2026-89874)
CWE-ID: CWE-476 - NULL Pointer Dereference
CVSSv4: 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]
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.
Remediation
Install update from vendor's website.
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