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CVE-2025-21662 – Mellanox Technologies mlx5 Core Deadlock Vulnerability

The following table lists the changes that have been made to the
CVE-2025-21662 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. 21, 2025

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

    net/mlx5: Fix variable not being completed when function returns

    When cmd_alloc_index(), fails cmd_work_handler() needs
    to complete ent->slotted before returning early.
    Otherwise the task which issued the command may hang:

    mlx5_core 0000:01:00.0: cmd_work_handler:877:(pid 3880418): failed to allocate command entry
    INFO: task kworker/13:2:4055883 blocked for more than 120 seconds.
    Not tainted 4.19.90-25.44.v2101.ky10.aarch64 #1
    “echo 0 > /proc/sys/kernel/hung_task_timeout_secs” disables this message.
    kworker/13:2 D 0 4055883 2 0x00000228
    Workqueue: events mlx5e_tx_dim_work [mlx5_core]
    Call trace:
    __switch_to+0xe8/0x150
    __schedule+0x2a8/0x9b8
    schedule+0x2c/0x88
    schedule_timeout+0x204/0x478
    wait_for_common+0x154/0x250
    wait_for_completion+0x28/0x38
    cmd_exec+0x7a0/0xa00 [mlx5_core]
    mlx5_cmd_exec+0x54/0x80 [mlx5_core]
    mlx5_core_modify_cq+0x6c/0x80 [mlx5_core]
    mlx5_core_modify_cq_moderation+0xa0/0xb8 [mlx5_core]
    mlx5e_tx_dim_work+0x54/0x68 [mlx5_core]
    process_one_work+0x1b0/0x448
    worker_thread+0x54/0x468
    kthread+0x134/0x138
    ret_from_fork+0x10/0x18
    Added Reference https://git.kernel.org/stable/c/0e2909c6bec9048f49d0c8e16887c63b50b14647
    Added Reference https://git.kernel.org/stable/c/229cc10284373fbe754e623b7033dca7e7470ec8
    Added Reference https://git.kernel.org/stable/c/36124081f6ffd9dfaad48830bdf106bb82a9457d
    Added Reference https://git.kernel.org/stable/c/f0a2808767ac39f64b1d9a0ff865c255073cf3d4
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