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。

  - ppp：修复 ppp_async_encode() 非法访问。syzbot 报告了 ppp_async_encode() 中的一个问题 [1] 在这种情况下，系统会调用大小为零的 pppoe_sendmsg()。然后调用 skb 为空的 ppp_async_encode()。
    错误：KMSAN：ppp_async_encode drivers/net/ppp/ppp_async.c:545 中 uninit-value [内联] 错误：KMSAN：ppp_async_push+0xb4f/0x2660 drivers/net/ppp/ppp_async.c:675 中的 uninit-value ppp_async_encode drivers/net/ppp/ppp_async.c:545 [内联] ppp_async_push+0xb4f/0x2660 drivers/net/ppp/ppp_async.c:675 ppp_async_send+0x130/0x1b0 drivers/net/ppp/ppp_async.c:634 ppp_channel_bridge_input drivers/net/ppp/ppp_generic.c:2280 [内联] ppp_input+0x1f1/0xe60 drivers/net/ppp/ppp_generic.c:2304 pppoe_rcv_core+0x1d3/0x720 drivers/net/ppp/pppoe.c:379 sk_backlog_rcv+0x13b/0x420 include/net/sock.h:1113
    __release_sock+0x1da/0x330 net/core/sock.c:3072 release_sock+0x6b/0x250 net/core/sock.c:3626 pppoe_sendmsg+0x2b8/0xb90 drivers/net/ppp/pppoe.c:903 sock_sendmsg_nosec net/socket.c:729 [内联]
    __sock_sendmsg+0x30f/0x380 net/socket.c:744 ____sys_sendmsg+0x903/0xb60 net/socket.c:2602
    ___sys_sendmsg+0x28d/0x3c0 net/socket.c:2656 __sys_sendmmsg+0x3c1/0x960 net/socket.c:2742
    __do_sys_sendmmsg net/socket.c:2771 [内联] __se_sys_sendmmsg net/socket.c:2768 [内联]
    __x64_sys_sendmmsg+0xbc/0x120 net/socket.c:2768 x64_sys_call+0xb6e/0x3ba0 arch/x86/include/generated/asm/syscalls_64.h:308 do_syscall_x64 arch/x86/entry/common.c:52 [内联] do_syscall_64+0xcd/0x1e0 arch/x86/entry/common.c:83 entry_SYSCALL_64_after_hwframe+0x77/0x7f Uninit 在以下位置创建：slab_post_alloc_hook mm/slub.c:4092 [内联] slab_alloc_node mm/slub.c:4135 [内联] kmem_cache_alloc_node_noprof+0x6bf/0xb80 mm/slub.c:4187 kmalloc_reserve+0x13d/0x4a0 net/core/skbuff.c:587
    __alloc_skb+0x363/0x7b0 net/core/skbuff.c:678 alloc_skb include/linux/skbuff.h:1322 [内联] sock_wmalloc+0xfe/0x1a0 net/core/sock.c:2732 pppoe_sendmsg+0x3a7/0xb90 drivers/net/ppp/pppoe.c:867 sock_sendmsg_nosec net/socket.c:729 [内联] __sock_sendmsg+0x30f/0x380 net/socket.c:744
    ____sys_sendmsg+0x903/0xb60 net/socket.c:2602 ___sys_sendmsg+0x28d/0x3c0 net/socket.c:2656
    __sys_sendmmsg+0x3c1/0x960 net/socket.c:2742 __do_sys_sendmmsg net/socket.c:2771 [内联]
    __se_sys_sendmmsg net/socket.c:2768 [内联] __x64_sys_sendmmsg+0xbc/0x120 net/socket.c:2768 x64_sys_call+0xb6e/0x3ba0 arch/x86/include/generated/asm/syscalls_64.h:308 do_syscall_x64 arch/x86/entry/common.c:52 [内联] do_syscall_64+0xcd/0x1e0 arch/x86/entry/common.c:83 entry_SYSCALL_64_after_hwframe+0x77/0x7f CPU：1 UID：0 PID：5411 命令：syz.1.14 未感染 6.12.0-rc1-syzkaller-00165-g360c1f1f24c6 #0 硬件名称：Google Google Compute Engine/Google Compute Engine，BIOS Google 09/13/2024 (CVE-2024-50035)

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-2024-50035

high Nessus 插件 ID 231168

版本 1.24