CVE-2026-93139 drm/amdgpu/mes: Fix hung_queue_db_array loop limit for multi-XCC
A null pointer dereference in the AMDGPU kernel driver can cause a system crash on multi-XCC GPUs due to uninitialized array entries.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Local or same network only
- Victim action needed
- Not needed
- Fix
- Available
What is CVE-2026-93139?
CVE-2026-93139 is a vulnerability in Linux, published on 17 Sep 2026. It can only be exploited from the same machine or local network, with no action from the victim.
Official description
In the Linux kernel, the following vulnerability has been resolved:
drm/amdgpu/mes: Fix hung_queue_db_array loop limit for multi-XCC
The loop iterated only AMDGPU_MAX_MES_PIPES times, leaving entries uninitialized for multi-XCC GPUs. This causes null pointer dereferences when accessing arrays indexed by XCC ID >= 2. Extend the loop to cover all XCCs (AMDGPU_MAX_MES_PIPES * num_xcc), matching other per-XCC arrays.
Which versions are affected by CVE-2026-93139?
How do I fix CVE-2026-93139?
Apply the vendor's patch.
Is CVE-2026-93139 being exploited?
There is no known exploitation of CVE-2026-93139 in the wild and no public exploit code.
Sources
Also known as GHSA-h628-62x6-4jjj, UBUNTU-CVE-2026-93139.