SB20260812242 - NULL pointer dereference in Linux kernel drm vc4 driver

Description

This security bulletin contains information about 1 vulnerability.

1) NULL pointer dereference (CVE-ID: CVE-2026-68303)

CWE-ID: CWE-476 - NULL Pointer Dereference

CVSSv4: 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]

The vulnerability allows a local user to cause a denial of service.

The vulnerability exists due to a null pointer dereference in the vc4_hvs_unbind and vc4_v3d_unbind functions when unbinding dependent vc4 drivers after vc4-drm removal. A local user can trigger driver unbind operations to cause a denial of service.

The issue occurs because the dependent drivers access master driver data after the vc4-drm device has already been removed.

Remediation

Install update from vendor's website.

References

• https://git.kernel.org/stable/c/261f0a3f0ac03248284f5116d3258f89c9642215
• https://git.kernel.org/stable/c/7dc3680b7ffe01add3e9299fde8471d2dd53a8ae