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CVE-2025-39706 – drm/amdkfd: Destroy KFD debugfs after destroy KFD wq

The following table lists the changes that have been made to the
CVE-2025-39706 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

    Sep. 05, 2025

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

    drm/amdkfd: Destroy KFD debugfs after destroy KFD wq

    Since KFD proc content was moved to kernel debugfs, we can’t destroy KFD
    debugfs before kfd_process_destroy_wq. Move kfd_process_destroy_wq prior
    to kfd_debugfs_fini to fix a kernel NULL pointer problem. It happens
    when /sys/kernel/debug/kfd was already destroyed in kfd_debugfs_fini but
    kfd_process_destroy_wq calls kfd_debugfs_remove_process. This line
    debugfs_remove_recursive(entry->proc_dentry);
    tries to remove /sys/kernel/debug/kfd/proc/ while
    /sys/kernel/debug/kfd is already gone. It hangs the kernel by kernel
    NULL pointer.

    (cherry picked from commit 0333052d90683d88531558dcfdbf2525cc37c233)
    Added Reference https://git.kernel.org/stable/c/2e58401a24e7b2d4ec619104e1a76590c1284a4c
    Added Reference https://git.kernel.org/stable/c/74ee7445c3b61c3bd899a54bd82c1982cb3a8206
    Added Reference https://git.kernel.org/stable/c/910735ded17cc306625e7e1cdcc8102f7ac60994
    Added Reference https://git.kernel.org/stable/c/96609a51e6134542bf90e053c2cd2fe4f61ebce3
    Added Reference https://git.kernel.org/stable/c/fc35c955da799ba62f6f977d58e0866d0251e3f8
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