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CVE-2025-38515 – “AMD Xe DRM Linux Kernel Queue Stalling Race Condition”

The following table lists the changes that have been made to the
CVE-2025-38515 vulnerability over time.

Vulnerability history details can be useful for understanding the evolution
of a vulnerability, and for identifying the most recent changes that may
impact the vulnerability’s severity, exploitability, or other characteristics.

  • New CVE Received
    by 416baaa9-dc9f-4396-8d5f-8c081fb06d67

    Aug. 16, 2025

    Action Type Old Value New Value
    Added Description In the Linux kernel, the following vulnerability has been resolved:

    drm/sched: Increment job count before swapping tail spsc queue

    A small race exists between spsc_queue_push and the run-job worker, in
    which spsc_queue_push may return not-first while the run-job worker has
    already idled due to the job count being zero. If this race occurs, job
    scheduling stops, leading to hangs while waiting on the job’s DMA
    fences.

    Seal this race by incrementing the job count before appending to the
    SPSC queue.

    This race was observed on a drm-tip 6.16-rc1 build with the Xe driver in
    an SVM test case.
    Added Reference https://git.kernel.org/stable/c/549a9c78c3ea6807d0dc4162a4f5ba59f217d5a0
    Added Reference https://git.kernel.org/stable/c/8af39ec5cf2be522c8eb43a3d8005ed59e4daaee
    Added Reference https://git.kernel.org/stable/c/c64f5310530baf75328292f9b9f3f2961d185183
    Added Reference https://git.kernel.org/stable/c/e2d6547dc8b9b332f9bc00875197287a6a4db65a
    Added Reference https://git.kernel.org/stable/c/e62f51d0ec8a9baf324caf9a564f8e318d36a551
    Added Reference https://git.kernel.org/stable/c/ef58a95457466849fa7b31fd3953801a5af0f58b
    Added Reference https://git.kernel.org/stable/c/ef841f8e4e1ff67817ca899bedc5ebb00847c0a7
    Added Reference https://git.kernel.org/stable/c/f9a4f28a4fc4ee453a92a9abbe36e26224d17749
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