CVE-2026-98144 accel/amdxdna: put the chained BO when its mapping fails
A local attacker can trigger a reference leak in the AMD XDNA driver by recycling buffer handles, potentially causing a denial of service.
- 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-2026-98144?
CVE-2026-98144 is a medium-severity memory corruption vulnerability in Linux kernel, published on 25 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:
accel/amdxdna: put the chained BO when its mapping fails
amdxdna_cmd_set_error() looks up the first BO of a command chain, which takes a reference, and drops it at the end of the function. The mapping of that BO is established in between, and the failure path returns without the put, so the reference is leaked.
Ordinary use does not reach it. The chain has been submitted before any of this runs, so aie2_cmdlist_fill_slot() has already called amdxdna_cmd_get_op() on that BO and amdxdna_gem_vmap() has cached its address. What makes it reachable is that the BO is resolved again by handle here, and the handle is userspace's to recycle: closing it after submission and importing a dma-buf whose exporter implements no vmap onto the same id leaves amdxdna_gem_get_obj() returning an object this cannot map, since prime_import() types every import AMDXDNA_BO_SHARE.
Weakness: CWE-401
Which versions are affected by CVE-2026-98144?
It affects 1 product.
Products include Linux kernel.
How do I fix CVE-2026-98144?
Apply the vendor's patch.
Upgrade to the fixed version. Memory-safe languages, compiler hardening and fuzzing prevent most new cases. More about Memory corruption.
Is CVE-2026-98144 being exploited?
There is no known exploitation of CVE-2026-98144 in the wild and no public exploit code.
Other vulnerabilities in Linux kernel
Sources
Also known as BELL-CVE-2026-98144, DEBIAN-CVE-2026-98144, GHSA-qg8m-gr5q-xfg6, UBUNTU-CVE-2026-98144.