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。

  - net_schedsch_sfq不允许 1 个数据包限制 当前实现无法正常工作限制为 1。iproute2 实际上会检查这一点并且此修补程序也会在内核中添加检查。此更新修复了 syzkaller 报告的以下崩溃UBSAN: array-index-out-of-bounds in net/sched/sch_sfq.c:210:6 index 65535 is out of range for type 'struct sfq_head[128]' CPU: 0 PID: 2569 Comm: syz-executor101未受感染 5.10.0-smp-DEV #1 硬件名称Google Google Compute Engine/Google Compute Engine、BIOS Google 09/13/2024 调用跟踪__dump_stack lib/dump_stack.c:79 [inline] dump_stack+0x125/0x19f lib /dump_stack.c:120 ubsan_epilogue lib/ubsan.c:148 [inline] __ubsan_handle_out_of_bounds+0xed/0x120 lib/ubsan.c:347 sfq_link net/sched/sch_sfq.c:210 [inline] sfq_dec+0x528/0x600 net/sched /sch_sfq.c:238 sfq_dequeue+0x39b/0x9d0 net/sched/sch_sfq.c:500 sfq_reset+0x13/0x50 net/sched/sch_sfq.c:525 qdisc_reset+0xfe/0x510 net/sched/sch_generic.c:1026 tbf_reset+ 0x3d/0x100 net/sched/sch_tbf.c:319 qdisc_reset+0xfe/0x510 net/sched/sch_generic.c:1026 dev_reset_queue+0x8c/0x140 net/sched/sch_generic.c:1296 netdev_for_each_tx_queue include/linux/netdevice.h:2350 [内联] dev_deactivate_many+0x6dc/0xc20 net/sched/sch_gen eric.c:1362 __dev_close_many+0x214/0x350 net/core/dev.c:1468 dev_close_many+0x207/0x510 net/core/dev.c:1506 unregister_netdevice_many+0x40f/0x16b0 net/core/dev.c:10738 unregister_netdevice_queue+0x2be /0x310 net/core/dev.c:10695 unregister_netdevice include/linux/netdevice.h:2893 [内联] __tun_detach+0x6b6/0x1600 drivers/net/tun.c:689 tun_detach drivers/net/tun.c:705 [内联] tun_chr_close+0x104/0x1b0 drivers/net/tun.c:3640 __fput+0x203/0x840 fs/file_table.c:280 task_work_run+0x129/0x1b0 kernel/task_work.c:185 exit_task_work include/linux/task_work.h:33 [ inline] do_exit+0x5ce/0x2200 kernel/exit.c:931 do_group_exit+0x144/0x310 kernel/exit.c:1046 __do_sys_exit_group kernel/exit.c:1057 [inline] __se_sys_exit_group kernel/exit.c:1055 [inline] __x64_sys_exit_group+ 0x3b/0x40 kernel/exit.c:1055 do_syscall_64+0x6c/0xd0 entry_SYSCALL_64_after_hwframe+0x61/0xcb RIP0033:0x7fe5e7b52479 代码无法访问 RIP 0x7fe5e7b5244f 上的操作码字节。RSP002b:00007ffd3c800398 EFLAGS: 00000246 ORIG_RAX: 00000000000000e7 RAX
    ffffffffffffffda RBX: 0000000000000000 RCX: 00007fe5e7b52479 RDX: 000000000000003c RSI: 00000000000000e7 RDI: 0000000000000000 RBP: 00007fe5e7bcd2d0 R08: ffffffffffffffb8 R09: 0000000000000014 R10:
     R110000000000000000  : 0000000000000246 R12: 00007fe5e7bcd2d0 R13: 0000000000000000 R14: 00007fe5e7bcdd20 R15: 00007fe5e7b24270 The crash can be also be reproduced with the following (with a tc recompiled to allow for sfq limits of 1): tc qdisc add dev dummy0 handle 1: root tbf rate 1Kbit Burst 100b lat 1s ../iproute2-6.9.0/tc/tc qdisc add dev dummy0 handle 2: parent 1:10 sfq limit 1 ifconfig dummy0 up ping -I dummy0 -f -c2 -W0. 1 8.8.8.8 sleep 1 触发崩溃的场景* 第一个数据包在 TBF 和 SFQ 中发送并排队qdisc qlen 为 1 * TBF 出列其从 SFQ 进行扫视后者将数据包移动到 gso_skb 列表并将 qdisc qlen 设置为 1。TBF 的标记用尽因此其自行计划以供稍后使用。 * 发送了第二个数据包后 TBF 尝试将其排入 SFQ 的队列。 qdisc qlen 现在为 2并且由于 SFQ 限制为 1该数据包会被 SFQ 丢弃。此时 qlen 为 1并且所有 SFQ 槽都是空的但 q->tail 不是 NULL。此时假设没有更多数据包排队则当 sch_dequeue 再次运行时它将减少当前空插槽的 qlen从而导致下溢和后续的越界访问。 (CVE-2024-57996)

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-2024-57996

medium Nessus 插件 ID 231025

版本 1.5

版本 1.4

版本 1.3

版本 1.2

版本 1.1

版本 1.5 Sep 5, 2025, 7:39 AM CVSS metrics ("Cvssv4 score" set to 0.0) CVSSv2 severity (based on None, severity decreased from "High" to "Low") Detection (updated detection logic) Plugin metadata Plugin Feed: 202509050739
版本 1.4 Sep 1, 2025, 10:01 PM CVSS metrics ("Cvssv4 score" set to 0.0) CVSSv2 severity (based on None, severity decreased from "High" to "Low") Detection (updated detection logic) Plugin metadata Plugin Feed: 202509012201
版本 1.3 Aug 21, 2025, 7:41 AM CVSS metrics ("Cvssv4 score" set to 0.0) CVSSv2 severity (based on None, severity decreased from "High" to "Low") Detection (updated detection logic) Plugin metadata Plugin Feed: 202508210741
版本 1.2 Aug 7, 2025, 1:00 AM CVSS metrics ("Cvssv4 score" set to 0.0) CVSSv2 severity (based on None, severity decreased from "High" to "Low") Detection (updated detection logic) Plugin metadata Plugin Feed: 202508070100
版本 1.1 Mar 6, 2025, 5:02 PM New Plugin Feed: 202503061702