CVE-2025-21995 – Linux Kernel DRM Fence Reference Count Leak

The following table lists the changes that have been made to the
CVE-2025-21995 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

    Apr. 03, 2025

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

    drm/sched: Fix fence reference count leak

    The last_scheduled fence leaks when an entity is being killed and adding
    the cleanup callback fails.

    Decrement the reference count of prev when dma_fence_add_callback()
    fails, ensuring proper balance.

    [phasta: add git tag info for stable kernel]

    Added Reference https://git.kernel.org/stable/c/1135a9431160575466ea9ac37ebd756ecbe35fff
    Added Reference https://git.kernel.org/stable/c/35399c84dcedd6d31448fb9e1336ef52673f2882
    Added Reference https://git.kernel.org/stable/c/a952f1ab696873be124e31ce5ef964d36bce817f
    Added Reference https://git.kernel.org/stable/c/c76bd3c99293834de7d1dca5de536616d5655e38
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