Linux/Unix 主機上安裝了一個或多個受到弱點影響的套件，且廠商未提供可用的修補程式。

  - atmatmtcp防止 atmtcp_recv_control() 中的任意寫入。 syzbot 報告了以下問題。 [0] 透過 connect() 或 close() 呼叫 atmtcp_v_open() 或 atmtcp_v_close() 時系統會呼叫 atmtcp_send_control() 以傳送核心內特殊訊息。訊息的 atmtcp_control.hdr.length 中有 ATMTCP_HDR_MAGIC。此外結構 atm_vcc 的指標設定為 atmtcp_control.vcc。值得注意的是 struct atmtcp_control 是 uAPI但有一個空間供一個核心內指標使用。 struct atmtcp_control { struct atmtcp_hdr hdr; /* 必須在前面
    */ ... atm_kptr_t vcc /* 兩個方向 */ ... } __ATM_API_ALIGN; typedef struct { unsigned char _[8]; }
    __ATM_API_ALIGN atm_kptr_t特殊訊息是在從 atmtcp_c_send() 呼叫的 atmtcp_recv_control() 中處理。 atmtcp_c_send() 是 vcc->dev->ops->send()並從 2 個路徑呼叫1. .ndo_start_xmit() (vcc->send() == atm_send_aal0()) 2. vcc_sendmsg() 問題在於 sendmsg () 不會驗證訊息長度而且使用者空間可濫用 atmtcp_recv_control() 以 atmtcp_control 覆寫任何 kptr。讓我們新增一個 ->pre_send() 勾點以驗證來自 sendmsg() 的訊息。 [0]Oops一般保護錯誤可能是針對非正式位址 0xdffffc00200000ab0000 [#1] SMP KASAN PTI KASAN 可能是使用者記憶體存取範圍 [0x0000000100000558-0x000000010000055f] CPU0 UID0 PID 5865 Commsyz-executor331 未受污染的 6.17.0-rc1-syzkaller-00215-gbab3ce404553 #0 PREEMPT(完整) 硬體名稱: Google Google Compute Engine/Google Compute Engine、BIOS Google 07/12/2025 RIP: 0010:atmtcp_recv_control drivers/ atm/atmtcp.c:93 [內嵌] RIP0010:atmtcp_c_send+0x1da/0x950 drivers/atm/atmtcp.c:297 代碼4d 8d 75 1a 4c 89 f0 48 c1 e8 03 42 0f b6 04 20 84 c0 0f 85 15 06 00 00 41 0f b7 1e 4d 8d b7 60 05 00 00 4c 89 f0 48 c1 e8 03 <42> 0f b6 04 20 84 c0 0f 85 13 06 00 00 66 41 89 1e 4d 8d 75 1c 4c ff ff:130018 EFLAGS00010203 RAX
    00000000200000ab RBX: 0000000000000000 RCX: 0000000000000000 RDX: ffff88802a510000 RSI: 00000000ffffffff RDI: ffff888030a6068c RBP: ffff88802699fb40 R08: ffff888030a606eb R09: 1ffff1100614c0dd R10:
     R11dffffc0000000000  : ffffffff8718fc40 R12: dffffc0000000000 R13: ffff888030a60680 R14: 000000010000055f R15: 00000000ffffffff FS: 00007f8d7e9236c0(0000) GS:ffff888125c1c000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 000000000045ad50 CR3: 0000000075bde000 CR4: 00000000003526f0 Call Trace: <TASK> vcc_sendmsg+0xa10/0xc60 net/atm/common.c:645 sock_sendmsg_nosec net/socket.c:714 [inline] __sock_sendmsg+0x219/0x270 net/socket.c:729 ____sys_sendmsg +0x505/0x830 net/socket.c:2614
    ___sys_sendmsg+0x21f/0x2a0 net/socket.c:2668 __sys_sendmsg net/socket.c:2700 [內嵌] __do_sys_sendmsg net/socket.c:2705 [內嵌] __se_sys_sendmsg net/socket.c:2703 [內嵌] __x64_sys_sendmsg+0x19b/0x260 net/socket.c:2703 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [內嵌] do_syscall_64+0xfa/0x3b0 arch/x86/entry/syscall_64.c:94 entry_SYSCALL_64_after_hwframe+0x77/0x7f RIP0033:0x7f8d7e96a4a9 程式碼28 00 00 00 75 05 48 83 c4 28 c3 e8 51 18 00 00 90 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 3 01 f 0 ff 01 c3 48 c7 c1 b0 ff ff ff f7 d8 64 89 01 48 RSP
    002b:00007f8d7e923198 EFLAGS00000246 ORIG_RAX: 000000000000002e RAXffffffffffffffda RBX
    00007f8d7e9f4308 RCX: 00007f8d7e96a4a9 RDX: 0000000000000000 RSI: 0000200000000240 RDI: 0000000000000005 RBP: 00007f8d7e9f4300 R08: 65732f636f72702f R09: 65732f636f72702f R10: 65732f636f72702f R11:
    0000000000000246 R12: 00007f8d7e9c10ac R13: 00007f8d7e9231a0 R14: 0000200000000200 R15: 0000200000000250 </TASK> 連結於 的模組 (CVE-2025-39828)

請注意，Nessus 的判定取決於廠商所報告的套件是否存在。

偵測

Linux Distros 未修補的弱點：CVE-2025-39828

high Nessus Plugin ID 265160

版本 1.19