NULL pointer dereference in Linux kernel - CVE-2026-53058
Published: June 25, 2026
Vulnerability identifier: #VU135278
CSH Severity: Low
CVSS v4.0: 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
CVE-ID: CVE-2026-53058
CWE-ID: CWE-476
Exploitation vector: Local access
Exploit availability:
No public exploit available
Vendor: Linux Foundation
Affected software:
Linux kernel
Linux kernel
Detailed vulnerability description
The vulnerability allows a local user to cause a denial of service.
The vulnerability exists due to a NULL pointer dereference in the Cadence MHDP8546 DRM bridge driver when handling atomic enable error recovery paths. A local user can trigger link-up or register-read errors that reach modeset retry handling to cause a denial of service.
The issue occurs with the DRM_BRIDGE_ATTACH_NO_CONNECTOR flag set.
How to mitigate CVE-2026-53058
Install security update from vendor's repository.
Sources
- https://git.kernel.org/stable/c/1af3b42e08a957e53bab8e1897393fe0a27d9fbf
- https://git.kernel.org/stable/c/43d6508ddbf9fb974fbc359a033154f78c9d4c8b
- https://git.kernel.org/stable/c/5302015daf26ef6b48e067f2b86c9482ac19e015
- https://git.kernel.org/stable/c/a3611554e599d1a24b45fd8415bacb72ce861e4b
- https://git.kernel.org/stable/c/cf2ac2cac8b319f89b3a3851ca0c5ffb6a549575