Linux/Unix 主机中安装的一个或多个程序包受到一个漏洞影响，而供应商没有提供补丁程序。

  - smc修复 __pnet_find_base_ndev() 中的释放后使用。 syzbot 报告了
    __pnet_find_base_ndev()在 connect() 期间调用。 [0] smc_pnet_find_ism_resource() 提取 sk_dst_get(sk)->dev 并向下传递到保存 RTNL 的 pnet_find_base_ndev()。然后UAF 发生在
    首次使用 dev 时的 __pnet_find_base_ndev()。这表示在获取 RTNL 之前已在 pnet_find_base_ndev() 中释放 dev。当 dev 消失时dst->dev 可与 Blackhole_netdev 交换且 dst 提供的 dev 的 refcnt 将予以释放。调用 smc_pnet_find_ism_resource() 之前必须保持 dev 的 refcnt。此外smc_pnet_find_roce_resource() 也存在相同的问题。让我们使用
    两个函数中的 __sk_dst_get() 和 dst_dev_rcu()。 [0]BUGKASAN 中存在释放后使用错误
    __pnet_find_base_ndev+0x1b1/0x1c0 net/smc/smc_pnet.c:926 由任务 syz.0.3632/18609 CPU:1 UID:0 PID:18609 Comm:syz.0.3632 至 addr ffff888036bac33a 进行的大小为 1 的读取(大小为 1 #0 )位于 addr ffff888036bac33a ) 硬件名称Google Google Compute Engine/Google Compute EngineBIOS Google 08/18/2025 调用跟踪 <TASK> dump_stack_lvl+0x189/0x250 lib/dump_stack.c:120 print_address_description mm/kasan/report.c:378 [内联] print_report+0xca/0x240 mm/kasan/report.c:482 kasan_report+0x118/0x150 mm/kasan/report.c:595
    __pnet_find_base_ndev+0x1b1/0x1c0 net/smc/smc_pnet.c:926 pnet_find_base_ndev net/smc/smc_pnet.c:946 [内联] smc_pnet_find_ism_by_pnetid net/smc/smc_pnet.c:1103 [内联] smc_pnet_find0pnet0mc_ism_resource/smc_pnet_find_ism_rec:1103 [内联] smc_pnet_find0pnet.c:926 .c:1154 smc_find_ism_device net/smc/af_smc.c:1030 [内联] smc_find_proposal_devices net/smc/af_smc.c:1115 [内联] __smc_connect+0x372/0x1890 net/smc/af_smc.c:1545 smc_connect+0x877/0xd90 net /smc/af_smc.c:1715 __sys_connect_file net/socket.c:2086 [内联] __sys_connect+0x313/0x440 net/socket.c:2105 __do_sys_connect net/socket.c:2111 [内联]
    __se_sys_connect net/socket.c:2108 [内联] __x64_sys_connect+0x7a/0x90 net/socket.c:2108 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [内联] do_syscall_64+0xfa/0x3b0 arch/x86/entry/syscall_64 .c:94 entry_SYSCALL_64_after_hwframe+0x77/0x7f RIP: 0033:0x7f47cbf8eba9 Code: ff ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 00 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 01 f0 ff ff 73 01 c3 48 c7 c1 a8 ff ff ff f7 d8 64 89 01 48 RSP: 002b:00007f47ccdb1038 EFLAGS: 00000246 ORIG_RAX: 000000000000002a RAX: ffffffffffffffda RBX: 00007f47cc1d5fa0 RCX: 00007f47cbf8eba9 RDX
    0000000000000010 RSI: 0000200000000280 RDI: 000000000000000b RBP: 00007f47cc011e19 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13:
     R1400007f47cc1d6038  : 00007f47cc1d5fa0 R15: 00007ffc512f8aa8 </TASK> The buggy address belongs to the physical page: page: refcount:0 mapcount:0 mapping:0000000000000000 index:0xffff888036bacd00 pfn:0x36bac flags: 0xfff00000000000(node=0|zone=1|lastcpupid=0x7ff) raw: 00fff00000000000 ffffea0001243d08 ffff8880b863fdc0 0000000000000000 raw: ffff888036bacd00 0000000000000000 00000000ffffffff 0000000000000000 page dumped because: kasan: bad access detected page_owner tracks the page as freed page last allocated via order 2, migratetype Unmovable, gfp_mask 0x446dc0(GFP_KERNEL_ACCOUNT|__GFP_ZERO|__GFP_NOWARN|__GFP_RETRY_MAYFAIL| __GFP_COMP)、pid 16741、tgid 16741 (syz-executor)、ts 343313197788、free_ts 380670750466 set_page_owner include/linux/page_owner.h:32 [inline] post_alloc_hook+0x240/0x2a0 mm/page_alloc.c_new mm_new mm/page_alloc.c:1851 prep_alloc_alpage.h 1859 [inline] get_page_from_freelist+0x21e4/0x22c0 mm/page_alloc.c:3858 __alloc_frozen_pages_noprof+0x181/0x370 mm/page_alloc.c:5148 alloc_pages_mpol+0x232/0x4a0 mm/ mempolicy.c:2416 ___kmalloc_large_node+0x5f/0x1b0 mm/slub.c:4317 __kmalloc_large_node_noprof+0x18/0x90 mm/slub.c:4348 __do_kmalloc_node mm/slub.c:4364 [inline] __kvmalloc_node ---truncated--- (CVE-2025-40064)

请注意，Nessus 依赖供应商报告的程序包是否存在进行判断。

检测

Linux Distros 未修补的漏洞：CVE-2025-40064

high Nessus 插件 ID 271876

版本 1.16