CVE-2026-68380

Summary

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.

Affected Software

VendorProductVersion RangeStatus
LinuxLinuxaac243092b707bb3018e951d470cc1a9bcbaba6c < 6875ee2bef48f5d9f045d81a8a4d68893f768a8aaffected
LinuxLinuxaac243092b707bb3018e951d470cc1a9bcbaba6c < e8fadbffc19a233d1eedebfb8df0f522d1388280affected
LinuxLinuxaac243092b707bb3018e951d470cc1a9bcbaba6c < faebb7ba1ac65fa5810b640df02ce04e509fdc11affected
LinuxLinux6.14affected
LinuxLinux0 < 6.14unaffected
LinuxLinux6.18.42 <= 6.18.*unaffected
LinuxLinux7.1.6 <= 7.1.*unaffected
LinuxLinux7.2-rc4 <= *unaffected

Weaknesses

References