SB20260625196 - Double free in Linux kernel amd amdgpu driver

Description

This security bulletin contains information about 1 vulnerability.

1) Double free (CVE-ID: CVE-2026-52987)

CWE-ID: CWE-415 - Double Free

CVSSv4: 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

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

The vulnerability exists due to a double free in amdgpu_userq_vm_validate() when handling failures from amdgpu_ttm_tt_get_user_pages() during user queue validation. A local user can trigger an error path that calls drm_exec_fini() twice on the same exec object to cause a denial of service.

The issue occurs when the new_addition path has already finalized the exec object before processing collected HMM ranges.

Remediation

Install update from vendor's website.

References

• https://git.kernel.org/stable/c/508babf310365f1107a2e8831c267c292a286818
• https://git.kernel.org/stable/c/c7c3ae7c01e5a0742b93cb9b40800bdd7f811e38