CVE-2026-68380

In the Linux kernel, the following vulnerability has been resolved:

accel/amdxdna: Fix use-after-free of mm_struct in job scheduler

amdxdnacmdsubmit() stores current->mm in job->mm without holding any reference. aie2schedjobrun() later access job->mm from the DRM scheduler worker thread. With only a raw pointer and no structural reference, the mmstruct 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.