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CVE-2025-21974 – ASUS PRIME Z690-P D4 bnxt_en Use-After-Free Vulnerability

The following table lists the changes that have been made to the
CVE-2025-21974 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. 01, 2025

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

    eth: bnxt: return fail if interface is down in bnxt_queue_mem_alloc()

    The bnxt_queue_mem_alloc() is called to allocate new queue memory when
    a queue is restarted.
    It internally accesses rx buffer descriptor corresponding to the index.
    The rx buffer descriptor is allocated and set when the interface is up
    and it’s freed when the interface is down.
    So, if queue is restarted if interface is down, kernel panic occurs.

    Splat looks like:
    BUG: unable to handle page fault for address: 000000000000b240
    #PF: supervisor read access in kernel mode
    #PF: error_code(0x0000) – not-present page
    PGD 0 P4D 0
    Oops: Oops: 0000 [#1] PREEMPT SMP NOPTI
    CPU: 3 UID: 0 PID: 1563 Comm: ncdevmem2 Not tainted 6.14.0-rc2+ #9 844ddba6e7c459cafd0bf4db9a3198e
    Hardware name: ASUS System Product Name/PRIME Z690-P D4, BIOS 0603 11/01/2021
    RIP: 0010:bnxt_queue_mem_alloc+0x3f/0x4e0 [bnxt_en]
    Code: 41 54 4d 89 c4 4d 69 c0 c0 05 00 00 55 48 89 f5 53 48 89 fb 4c 8d b5 40 05 00 00 48 83 ec 15
    RSP: 0018:ffff9dcc83fef9e8 EFLAGS: 00010202
    RAX: ffffffffc0457720 RBX: ffff934ed8d40000 RCX: 0000000000000000
    RDX: 000000000000001f RSI: ffff934ea508f800 RDI: ffff934ea508f808
    RBP: ffff934ea508f800 R08: 000000000000b240 R09: ffff934e84f4b000
    R10: ffff9dcc83fefa30 R11: ffff934e84f4b000 R12: 000000000000001f
    R13: ffff934ed8d40ac0 R14: ffff934ea508fd40 R15: ffff934e84f4b000
    FS: 00007fa73888c740(0000) GS:ffff93559f780000(0000) knlGS:0000000000000000
    CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
    CR2: 000000000000b240 CR3: 0000000145a2e000 CR4: 00000000007506f0
    PKRU: 55555554
    Call Trace:

    ? __die+0x20/0x70
    ? page_fault_oops+0x15a/0x460
    ? exc_page_fault+0x6e/0x180
    ? asm_exc_page_fault+0x22/0x30
    ? __pfx_bnxt_queue_mem_alloc+0x10/0x10 [bnxt_en 7f85e76f4d724ba07471d7e39d9e773aea6597b7]
    ? bnxt_queue_mem_alloc+0x3f/0x4e0 [bnxt_en 7f85e76f4d724ba07471d7e39d9e773aea6597b7]
    netdev_rx_queue_restart+0xc5/0x240
    net_devmem_bind_dmabuf_to_queue+0xf8/0x200
    netdev_nl_bind_rx_doit+0x3a7/0x450
    genl_family_rcv_msg_doit+0xd9/0x130
    genl_rcv_msg+0x184/0x2b0
    ? __pfx_netdev_nl_bind_rx_doit+0x10/0x10
    ? __pfx_genl_rcv_msg+0x10/0x10
    netlink_rcv_skb+0x54/0x100
    genl_rcv+0x24/0x40
    …
    Added Reference https://git.kernel.org/stable/c/14eb5f0d6554653f4b159835c2f77b2a9bd7e9be
    Added Reference https://git.kernel.org/stable/c/ca2456e073957781e1184de68551c65161b2bd30
    Added Reference https://git.kernel.org/stable/c/d3b8cd8a8a98c7c83a693bd651f1919be36a57f2
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