SB20260425155 - NULL pointer dereference in Linux kernel drm mediatek driver
Published: April 25, 2026
Security Bulletin ID
SB20260425155
CSH Severity
Low
Patch available
YES
Number of vulnerabilities
1
Exploitation vector
Local access
Highest impact
Denial of service
Breakdown by Severity
- Low
- Medium
- High
- Critical
Description
This security bulletin contains information about 1 vulnerability.
1) NULL pointer dereference (CVE-ID: CVE-2026-31562)
CWE-ID: CWE-476 - NULL Pointer Dereference
CVSSv4: CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:U/U:Clear
The vulnerability allows a local user to cause a denial of service.
The vulnerability exists due to a null pointer dereference in the mediatek dsi driver when registering the dsi drm encoder during device probe. A local user can load the vulnerable driver to cause a denial of service.
The crash occurs after acquiring the mode_config.idr_mutex, which blocks subsequent DRM operations.
Remediation
Install update from vendor's website.