NULL pointer dereference in Linux kernel - CVE-2026-31562
Published: April 25, 2026
Vulnerability identifier: #VU127837
CSH Severity: Low
CVSS v4: 6.8 [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]
CVE-ID: CVE-2026-31562
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 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.
Affected software
Linux kernel
Debian Linux
linux (Debian package)
Debian Linux
linux (Debian package)
How to mitigate CVE-2026-31562
Install security update from vendor's repository.
Linux kernel - update to 7.0 rc3
linux (Debian package) - update to 6.12.115-2
linux (Debian package) - update to 6.12.115-2