CVE-2026-72090 accel/amdxdna: Use caller client for debug BO sync
Incorrect client context usage in AMD XDNA driver debug buffer sync may cause logic errors or undefined behavior in kernel space.
- Exploited in the wild
- Not known
- Login needed
- Any signed-in user
- Attackable
- Local or same network only
- Victim action needed
- Not needed
- Fix
- Available
What is CVE-2026-72090?
CVE-2026-72090 is a high-severity vulnerability in Linux, published on 15 Aug 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:
accel/amdxdna: Use caller client for debug BO sync
amdxdna_drm_sync_bo_ioctl() looks up args->handle in the ioctl caller's drm_file. For SYNC_DIRECT_FROM_DEVICE, it then calls amdxdna_hwctx_sync_debug_bo(), but passes abo->client.
amdxdna_hwctx_sync_debug_bo() uses the passed client both as the handle namespace for debug_bo_hdl and as the owner of the hardware context xarray. Those must match the file that supplied args->handle. The BO's stored client pointer is object state, not the ioctl context.
Pass filp->driver_priv instead, matching the original handle lookup.
Which versions are affected by CVE-2026-72090?
How do I fix CVE-2026-72090?
Apply the vendor's patch.
Is CVE-2026-72090 being exploited?
There is no known exploitation of CVE-2026-72090 in the wild and no public exploit code.
Sources
Also known as DEBIAN-CVE-2026-72090, GHSA-qqcm-w5c8-f3qv, UBUNTU-CVE-2026-72090.