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CVE-2022-49931 – IBM HFI1 Null Pointer Dereference

The following table lists the changes that have been made to the
CVE-2022-49931 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

    May. 01, 2025

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

    IB/hfi1: Correctly move list in sc_disable()

    Commit 13bac861952a (“IB/hfi1: Fix abba locking issue with sc_disable()”)
    incorrectly tries to move a list from one list head to another. The
    result is a kernel crash.

    The crash is triggered when a link goes down and there are waiters for a
    send to complete. The following signature is seen:

    BUG: kernel NULL pointer dereference, address: 0000000000000030
    […]
    Call Trace:
    sc_disable+0x1ba/0x240 [hfi1]
    pio_freeze+0x3d/0x60 [hfi1]
    handle_freeze+0x27/0x1b0 [hfi1]
    process_one_work+0x1b0/0x380
    ? process_one_work+0x380/0x380
    worker_thread+0x30/0x360
    ? process_one_work+0x380/0x380
    kthread+0xd7/0x100
    ? kthread_complete_and_exit+0x20/0x20
    ret_from_fork+0x1f/0x30

    The fix is to use the correct call to move the list.
    Added Reference https://git.kernel.org/stable/c/1afac08b39d85437187bb2a92d89a741b1078f55
    Added Reference https://git.kernel.org/stable/c/25760a41e3802f54aadcc31385543665ab349b8e
    Added Reference https://git.kernel.org/stable/c/7c4260f8f188df32414a5ecad63e8b934c2aa3f0
    Added Reference https://git.kernel.org/stable/c/b8bcff99b07cc175a6ee12a52db51cdd2229586c
    Added Reference https://git.kernel.org/stable/c/ba95409d6b580501ff6d78efd00064f7df669926
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