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CVE-2024-56775 – AMD Display Refcount Vulnerability

The following table lists the changes that have been made to the
CVE-2024-56775 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

    Jan. 08, 2025

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

    drm/amd/display: Fix handling of plane refcount

    [Why]
    The mechanism to backup and restore plane states doesn’t maintain
    refcount, which can cause issues if the refcount of the plane changes
    in between backup and restore operations, such as memory leaks if the
    refcount was supposed to go down, or double frees / invalid memory
    accesses if the refcount was supposed to go up.

    [How]
    Cache and re-apply current refcount when restoring plane states.
    Added Reference https://git.kernel.org/stable/c/27227a234c1487cb7a684615f0749c455218833a
    Added Reference https://git.kernel.org/stable/c/8cb2f6793845f135b28361ba8e96901cae3e5790
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