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

  - mptcp修正 mptcp_pm_del_add_timer() 中的爭用情形 mptcp_pm_del_add_timer() 可在另一個可能已經有可用項目的情況下呼叫 sk_stop_timer_sync(sk, &entry->add_timer)如 syzbot 所報告。新增 RCU 保護以修正此問題。也將令人混淆的 add_timer 變數變更為 stop_timer 布林值。 syzbot 報告錯誤
    KASAN在 __timer_delete_sync+0x372/0x3f0 kernel/time/timer.c:1616 中發生 slab 釋放後使用作業 kworker/1:1/44 在位址 ffff8880311e4150 讀取大小 4 CPU1 UID0 PID44 通訊kworker/1:1 未受污染的 syzkaller #0 PREEMPT_{RT,(full)} 硬體名稱Google Google Compute Engine/Google Compute Engine、BIOS Google 10/02/2025 工作佇列events mptcp_worker 呼叫追踪 <TASK> dump_stack_lvl+0x189/0x250 lib/dump_stack.c:120 print_address_description mm/kasan/report.c:378 [內嵌] print_report+0xca/0x240 mm/kasan/report.c:482 kasan_report+0x118/0x150 mm/kasan/report.c:595 __timer_delete_sync+ 0x372/0x3f0 kernel/time/timer.c:1616 sk_stop_timer_sync+0x1b/0x90 net/core/sock.c:3631 mptcp_pm_del_add_timer+0x283/0x310 net/mptcp/pm.c:362 mptcp_incoming_options+0x1357/0x1f60 net/mptcp/options .c:1174 tcp_data_queue+0xca/0x6450 net/ipv4/tcp_input.c:5361 tcp_rcv_established+0x1335/0x2670 net/ipv4/tcp_input.c:6441 tcp_v4_do_rcv+0x98b/0xbf0 net/ipv4/tcp_a_ipv4.c:19+x2155 0x2dc0 net/ipv4/tcp_ipv4。 c:2374 ip_protocol_deliver_rcu+0x221/0x440 net/ipv4/ip_input.c:205 ip_local_deliver_finish+0x3bb/0x6f0 net/ipv4/ip_input.c:239 NF_HOOK+0x30c/0x3a0 include/linux/netfilter.h:318 NF_HOOK+0x30c/0x3a0 include/linux/netfilter.h:318 __netif_receive_skb_one_core net/core/dev.c:6079 [內嵌]
    __netif_receive_skb+0x143/0x380 net/core/dev.c:6192 process_backlog+0x31e/0x900 net/core/dev.c:6544
    __napi_poll+0xb6/0x540 net/core/dev.c:7594 napi_poll net/core/dev.c:7657 [內嵌] net_rx_action+0x5f7/0xda0 net/core/dev.c:7784 handle_softirqs+0x22f/0x710 kernel/softirq。 c:622
    __do_softirq kernel/softirq.c:656 [內嵌] __local_bh_enable_ip+0x1a0/0x2e0 kernel/softirq.c:302 mptcp_pm_send_ack net/mptcp/pm.c:210 [內嵌] mptcp_pm_addr_send_ack+0x41f/0x500 net/mptcp/pm.c:- 1 mptcp_pm_worker+0x174/0x320 net/mptcp/pm.c:1002 mptcp_worker+0xd5/0x1170 net/mptcp/protocol.c:2762 process_one_work kernel/workqueue.c:3263 [inline] process_scheduled_works+0xae1/0x17b0 kernel/workqueue.c 3346 worker_thread+0x8a0/0xda0 kernel/workqueue.c:3427 kthread+0x711/0x8a0 kernel/kthread.c:463 ret_from_fork+0x4bc/0x870 arch/x86/kernel/process.c:158 ret_from_fork_asm+0x1a/0x30 arch/x86 /entry/entry_64.S:245 </TASK> 由工作 44 配置kasan_save_stack mm/kasan/common.c:56 [內嵌] kasan_save_track+0x3e/0x80 mm/kasan/common.c:77 Pot_kmalloc_redzone mm/kasan/common.c :400 [內嵌]
    __kasan_kmalloc+0x93/0xb0 mm/kasan/common.c:417 kasan_kmalloc include/linux/kasan.h:262 [內嵌]
    __kmalloc_cache_noprof+0x1ef/0x6c0 mm/slub.c:5748 kmalloc_noprof include/linux/slab.h:957 [內嵌] mptcp_pm_alloc_anno_list+0x104/0x460 net/mptcp/pm.c:385 mptcp_pm_create_subflow_or_signal_addr+0xf9d/0x1360 net/mpcppm.c:385 c:355 mptcp_pm_nl_fully_established net/mptcp/pm_kernel.c:409 [內嵌] __mptcp_pm_kernel_worker+0x417/0x1ef0 net/mptcp/pm_kernel.c:1529 mptcp_pm_worker+0x1ee/0x320 net/mptcp/pm.c:1008 mptcp_worker+0xd5/0x /mptcp/protocol.c:2762 process_one_work kernel/workqueue.c:3263 [內嵌] process_scheduled_works+0xae1/0x17b0 kernel/workqueue.c:3346 worker_thread+0x8a0/0xda0 kernel/workqueue.c:3427 kthread+0x711/0x8a0 kernel/ kthread.c:463 ret_from_fork+0x4bc/0x870 arch/x86/kernel/process.c:158 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245 已由工作 6630 釋放kasan_save_stack mm/kasan/common.c :56 [內嵌] kasan_save_track+0x3e/0x80 mm/kasan/common.c:77
    __kasan_save_free_info+0x46/0x50 mm/kasan/generic.c:587 kasan_save_free_info mm/kasan/kasan.h:406 [內嵌] Pot_slab_object m ---truncated--- (CVE-2025-40257)

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-2025-40257

medium Nessus Plugin ID 277516

版本 1.7