CVE-2026-72093 accel/amdxdna: Fix use-after-free in amdxdna_gem_dmabuf_mmap()
A use-after-free in the AMD XDNA accelerator driver allows attackers to execute arbitrary code or escalate privileges via double-free logic.
- 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-2026-72093?
CVE-2026-72093 is a high-severity use after free 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: Fix use-after-free in amdxdna_gem_dmabuf_mmap()
When vm_insert_pages() fails, the error path calls vma->vm_ops->close(vma) which internally calls drm_gem_vm_close() → drm_gem_object_put(), releasing the GEM object reference acquired at the start of the function. However, the close_vma label then falls through to put_obj, which calls drm_gem_object_put() a second time on the same object.
If the first put releases the last reference, the object is freed and the second put accesses freed memory, causing a use-after-free.
Fix by returning directly from close_vma instead of falling through to put_obj, since the close handler already performs all necessary cleanup including the object put.
Which versions are affected by CVE-2026-72093?
How do I fix CVE-2026-72093?
Apply the vendor's patch.
Upgrade to the fixed version. These bugs are found with fuzzing and sanitisers and avoided by memory-safe languages. More about Use after free.
Is CVE-2026-72093 being exploited?
There is no known exploitation of CVE-2026-72093 in the wild and no public exploit code.
Sources
Also known as BELL-CVE-2026-72093, DEBIAN-CVE-2026-72093, GHSA-6xqj-5m3m-7w3w, UBUNTU-CVE-2026-72093.