CVE-2026-68380 accel/amdxdna: Fix use-after-free of mm_struct in job scheduler
A use-after-free vulnerability in the Linux kernel's amdxdna driver allows attackers to potentially execute code or escalate privileges via job scheduling.
- 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-2026-68380?
CVE-2026-68380 is a high-severity use after free vulnerability in Linux, published on 10 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 of mm_struct in job scheduler
amdxdna_cmd_submit() stores current->mm in job->mm without holding any reference. aie2_sched_job_run() later access job->mm from the DRM scheduler worker thread. With only a raw pointer and no structural reference, the mm_struct can be freed before the scheduler runs the job.
Fix this by calling mmgrab() to hold a structural mm_count reference for the lifetime of the job, paired with mmdrop() in every cleanup path.
Which versions are affected by CVE-2026-68380?
How do I fix CVE-2026-68380?
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-2026-68380 being exploited?
There is no known exploitation of CVE-2026-68380 in the wild and no public exploit code.
Sources
Also known as BELL-CVE-2026-68380, DEBIAN-CVE-2026-68380, GHSA-q88g-f4fr-ffwf, UBUNTU-CVE-2026-68380.