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CVE-2025-21725 – In the Linux kernel, the following vulnerability h

The following table lists the changes that have been made to the
CVE-2025-21725 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

    Feb. 27, 2025

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

    smb: client: fix oops due to unset link speed

    It isn’t guaranteed that NETWORK_INTERFACE_INFO::LinkSpeed will always
    be set by the server, so the client must handle any values and then
    prevent oopses like below from happening:

    Oops: divide error: 0000 [#1] PREEMPT SMP KASAN NOPTI
    CPU: 0 UID: 0 PID: 1323 Comm: cat Not tainted 6.13.0-rc7 #2
    Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-3.fc41
    04/01/2014
    RIP: 0010:cifs_debug_data_proc_show+0xa45/0x1460 [cifs] Code: 00 00 48
    89 df e8 3b cd 1b c1 41 f6 44 24 2c 04 0f 84 50 01 00 00 48 89 ef e8
    e7 d0 1b c1 49 8b 44 24 18 31 d2 49 8d 7c 24 28 f7 74 24 18 48 89
    c3 e8 6e cf 1b c1 41 8b 6c 24 28 49 8d 7c 24
    RSP: 0018:ffffc90001817be0 EFLAGS: 00010246
    RAX: 0000000000000000 RBX: ffff88811230022c RCX: ffffffffc041bd99
    RDX: 0000000000000000 RSI: 0000000000000567 RDI: ffff888112300228
    RBP: ffff888112300218 R08: fffff52000302f5f R09: ffffed1022fa58ac
    R10: ffff888117d2c566 R11: 00000000fffffffe R12: ffff888112300200
    R13: 000000012a15343f R14: 0000000000000001 R15: ffff888113f2db58
    FS: 00007fe27119e740(0000) GS:ffff888148600000(0000)
    knlGS:0000000000000000
    CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
    CR2: 00007fe2633c5000 CR3: 0000000124da0000 CR4: 0000000000750ef0
    PKRU: 55555554
    Call Trace:

    ? __die_body.cold+0x19/0x27
    ? die+0x2e/0x50
    ? do_trap+0x159/0x1b0
    ? cifs_debug_data_proc_show+0xa45/0x1460 [cifs]
    ? do_error_trap+0x90/0x130
    ? cifs_debug_data_proc_show+0xa45/0x1460 [cifs]
    ? exc_divide_error+0x39/0x50
    ? cifs_debug_data_proc_show+0xa45/0x1460 [cifs]
    ? asm_exc_divide_error+0x1a/0x20
    ? cifs_debug_data_proc_show+0xa39/0x1460 [cifs]
    ? cifs_debug_data_proc_show+0xa45/0x1460 [cifs]
    ? seq_read_iter+0x42e/0x790
    seq_read_iter+0x19a/0x790
    proc_reg_read_iter+0xbe/0x110
    ? __pfx_proc_reg_read_iter+0x10/0x10
    vfs_read+0x469/0x570
    ? do_user_addr_fault+0x398/0x760
    ? __pfx_vfs_read+0x10/0x10
    ? find_held_lock+0x8a/0xa0
    ? __pfx_lock_release+0x10/0x10
    ksys_read+0xd3/0x170
    ? __pfx_ksys_read+0x10/0x10
    ? __rcu_read_unlock+0x50/0x270
    ? mark_held_locks+0x1a/0x90
    do_syscall_64+0xbb/0x1d0
    entry_SYSCALL_64_after_hwframe+0x77/0x7f
    RIP: 0033:0x7fe271288911
    Code: 00 48 8b 15 01 25 10 00 f7 d8 64 89 02 b8 ff ff ff ff eb bd e8
    20 ad 01 00 f3 0f 1e fa 80 3d b5 a7 10 00 00 74 13 31 c0 0f 05 3d
    00 f0 ff ff 77 4f c3 66 0f 1f 44 00 00 55 48 89 e5 48 83 ec
    RSP: 002b:00007ffe87c079d8 EFLAGS: 00000246 ORIG_RAX: 0000000000000000
    RAX: ffffffffffffffda RBX: 0000000000040000 RCX: 00007fe271288911
    RDX: 0000000000040000 RSI: 00007fe2633c6000 RDI: 0000000000000003
    RBP: 00007ffe87c07a00 R08: 0000000000000000 R09: 00007fe2713e6380
    R10: 0000000000000022 R11: 0000000000000246 R12: 0000000000040000
    R13: 00007fe2633c6000 R14: 0000000000000003 R15: 0000000000000000

    Fix this by setting cifs_server_iface::speed to a sane value (1Gbps)
    by default when link speed is unset.
    Added Reference https://git.kernel.org/stable/c/208e102a2fca44e40a6c3f7b9e2609cfd17a15aa
    Added Reference https://git.kernel.org/stable/c/3f901c35e1a1b3ed1b528a17ffdb941aa0294458
    Added Reference https://git.kernel.org/stable/c/699179dfc8d7da457b152ca5d18ae45f9ed9beaa
    Added Reference https://git.kernel.org/stable/c/ad3b49fbdb156aa8ee2026ba590642c9b5a410f2
    Added Reference https://git.kernel.org/stable/c/be7a6a77669588bfa5022a470989702bbbb11e7f
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