Kernel memory corruption via scheduler use-after-free

Use-after-free in the Linux kernel allows local users to corrupt kernel memory through the Xe DRM job scheduler. The xe_sched_job cleanup path released the final execution-queue reference before freeing the job, so queue teardown could destroy job->vm while the job destructor still depended on it. Exploitation requires local low-privileged access and the affected Xe driver path; the vendor has not published a more specific consequence of the stale VM access.