SB20260812138 - Use-after-free in Linux kernel accel amdxdna driver

Description

This security bulletin contains information about 1 vulnerability.

1) Use-after-free (CVE-ID: CVE-2026-68380)

CWE-ID: CWE-416 - Use After Free

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 use-after-free in the amdxdna job scheduler when accessing job->mm from the DRM scheduler worker thread after job submission. A local user can submit a job and trigger access to a freed mm_struct to cause a denial of service.

The issue arises because current->mm is stored as a raw pointer without holding a structural reference for the lifetime of the job.

Remediation

Install update from vendor's website.

References

• https://git.kernel.org/stable/c/6875ee2bef48f5d9f045d81a8a4d68893f768a8a
• https://git.kernel.org/stable/c/e8fadbffc19a233d1eedebfb8df0f522d1388280
• https://git.kernel.org/stable/c/faebb7ba1ac65fa5810b640df02ce04e509fdc11