SB20260812431 - NULL pointer dereference in Linux kernel amd amdgpu driver

Description

This security bulletin contains information about 1 vulnerability.

1) NULL pointer dereference (CVE-ID: CVE-2026-68105)

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 amdgpu driver KIQ ring handling when loading the driver after MES initialization fails. A local user can trigger driver loading to cause a denial of service.

The issue occurs on ASICs that use MES, where the KIQ ring is owned by MES and may be incorrectly left marked as ready after initialization failure.

Remediation

Install update from vendor's website.

References

• https://git.kernel.org/stable/c/5bc93f907bad7e076d814664dfab8fc230efca3d
• https://git.kernel.org/stable/c/a279bd143b3c184358b658e43a057e31ee8c4de5