CVE-2026-72328 accel/amdxdna: Fix potential amdxdna_umap lifetime race
A race condition in the AMD XDNA driver allows a use-after-free, potentially enabling local attackers to execute code or escalate privileges.
- 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-2026-72328?
CVE-2026-72328 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 potential amdxdna_umap lifetime race
amdxdna_umap_release() calls the blocking mmu_interval_notifier_remove() before removing the object from abo->mem.umap_list. If aie2_populate_range() runs concurrently, it may obtain a reference to an amdxdna_umap that is being released, leading to a potential use-after-free.
Use kref_get_unless_zero() in aie2_populate_range() when acquiring a reference. If the reference count has already dropped to zero, release is in progress and the entry is skipped.
Which versions are affected by CVE-2026-72328?
How do I fix CVE-2026-72328?
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-2026-72328 being exploited?
There is no known exploitation of CVE-2026-72328 in the wild and no public exploit code.
Sources
Also known as BELL-CVE-2026-72328, DEBIAN-CVE-2026-72328, GHSA-cj8m-mvgq-xgpv, UBUNTU-CVE-2026-72328.