CVE-2026-80630— Linux 内核 net/sched 模块内存损坏漏洞
一分钟漏洞结论
影响对象
Linux Linux
利用判断
尚无明确在野利用证据，仍需结合暴露面评估
建议动作
优先检查厂商安全公告和参考链接中的修复版本；无法立即升级时，限制受影响服务暴露并加强监测。
以下是该漏洞描述的中文翻译： 在 Linux 内核中，以下漏洞已得到修复： net/sched: sch_fq_codel：不要在恢复 qlen 之前调用 qdisc_tree_reduce_backlog 当 fq_codel 在 peek（窥视）过程中丢弃数据包时，它会调用 。问题在于，它在重新增加（reincrements） 之前就调用了 。如果 降为零，但 peek 返回了一个 skb，父级的 回调函数将会被执行，尽管 fq_codel 队列中实际上还剩余 1 个数据包。这会导致父级队列节点被错误地置为不活
可能的 ATT&CK 技术 1 AI
T1190 · Exploit Public-Facing Application影响版本矩阵 29
| 厂商 | 产品 | 版本范围 | 状态 |
|---|---|---|---|
| Linux | Linux | cc71a757da78dd4aa1b4a9b19cb011833730ccf2< 3e515188393e62a718ccebee651ee74514104ff6 |
affected |
eda741fe155ddf5ecd2dd3bfbd4fc3c0c7dbb450< 20dd591d8f951e1e6aca5052be8785e6181055e2 |
affected | ||
829c49b6b2ff45b043739168fd1245e4e1a91a30< 94a5f1efdefb01f82cd228bf4e7ef1e8fc075c80 |
affected | ||
2f9761a94bae33d26e6a81b31b36e7d776d93dc1< acc08a0c7f37ebb1901144e03a7cba7d4afd9203 |
affected | ||
4d55144b12e742404bb3f8fee6038bafbf45619d< 7c09843fd2b44d9bf0de798683861d1aecd62a08 |
affected | ||
342debc12183b51773b3345ba267e9263bdfaaef< 0500af8630c3253f0dde879bd3a73a06bb2f2b3f |
affected | ||
342debc12183b51773b3345ba267e9263bdfaaef< af54df2f44d9605614bc7ed96640302a240a9a62 |
affected | ||
342debc12183b51773b3345ba267e9263bdfaaef< 097f6fc7b1ae362dd7a9444b2572162fda73b284 |
affected | ||
| … +21 条更多 | |||
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一、 漏洞 CVE-2026-80630 基础信息
漏洞信息
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Vulnerability Title
net/sched: sch_fq_codel: Do not call qdisc_tree_reduce_backlog during peek before restoring qlen
来源: CVE Program / CVE List V5
Vulnerability Description
In the Linux kernel, the following vulnerability has been resolved:
net/sched: sch_fq_codel: Do not call qdisc_tree_reduce_backlog during peek before restoring qlen
Whenever fq_codel drops packets during peek, it calls
qdisc_tree_reduce_backlog. An issue arises because it calls
qdisc_tree_reduce_backlog before it reincrements the qlen. If qlen drops
to zero, but peek returns an skb, the parent's qlen_notify callback will be
executed even though fq_codel still has 1 packet on the queue and, thus,
will mistakenly deactivate the parent's class causing issues like a recent
report [1] and a wild memory access in qfq:
[ 29.371146][ T360] Oops: general protection fault, probably for non-canonical address 0xfbd59c0000000024: 0000 [#1] SMP KASAN NOPTI
[ 29.371666][ T360] KASAN: maybe wild-memory-access in range [0xdead000000000120-0xdead000000000127]
[ 29.371987][ T360] CPU: 6 UID: 0 PID: 360 Comm: tc Not tainted 7.1.0-rc5-00285-gc530e5b2dbc6-dirty #82 PREEMPT(full)
[ 29.372384][ T360] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[ 29.372620][ T360] RIP: 0010:qfq_deactivate_agg (include/linux/list.h:1029 (discriminator 2) include/linux/list.h:1043 (discriminator 2) net/sched/sch_qfq.c:1369 (discriminator 2) net/sched/sch_qfq.c:1395 (discriminator 2)) sch_qfq
[ 29.373544][ T360] RSP: 0018:ffff888102417370 EFLAGS: 00010216
[ 29.373800][ T360] RAX: 0000000000000000 RBX: ffff88811224d568 RCX: dffffc0000000000
[ 29.374079][ T360] RDX: 1ffff11021fe1543 RSI: ffff88810ff0aa00 RDI: dffffc0000000000
[ 29.374368][ T360] RBP: ffff88811224c280 R08: dead000000000122 R09: 1bd5a00000000024
[ 29.374649][ T360] R10: fffffbfff7940329 R11: fffffbfff7940329 R12: 0000000000000000
[ 29.374926][ T360] R13: dead000000000100 R14: ffff88811224d580 R15: ffff88811224d578
[ 29.375207][ T360] FS: 00007f5b794e5780(0000) GS:ffff88815d1e9000(0000) knlGS:0000000000000000
[ 29.375545][ T360] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[ 29.375823][ T360] CR2: 000055ffb091f000 CR3: 000000010a305000 CR4: 0000000000750ef0
[ 29.376103][ T360] PKRU: 55555554
[ 29.376258][ T360] Call Trace:
[ 29.376401][ T360] <TASK>
...
[ 29.376885][ T360] qfq_reset_qdisc (net/sched/sch_qfq.c:357 net/sched/sch_qfq.c:1487) sch_qfq
[ 29.377074][ T360] qdisc_reset (net/sched/sch_generic.c:1057)
[ 29.377414][ T360] __qdisc_destroy (net/sched/sch_generic.c:1096)
[ 29.377600][ T360] qdisc_graft (net/sched/sch_api.c:1062 net/sched/sch_api.c:1053 net/sched/sch_api.c:1159)
[ 29.378593][ T360] tc_get_qdisc (net/sched/sch_api.c:1528 net/sched/sch_api.c:1556)
Fix this by only calling qdisc_tree_reduce_backlog in peek after the
qlen is restored.
[1] http://lore.kernel.org/netdev/CAN2cbVe79oj0O9==m4+4x3v+O+qzRagA=2=wkrp9i9=CqYvyZA@mail.gmail.com/
来源: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
来源: CVE Program / CVE List V5
Vulnerability Type
N/A
来源: CVE Program / CVE List V5
受影响产品
二、漏洞 CVE-2026-80630 的公开POC
| # | POC 描述 | 源链接 | 神龙链接 |
|---|
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CVE-2026-80630 补丁与修复 (8)
同批安全公告 · Linux · 2026-08-28 · 共 135 条
| CVE-2026-80634 | 9.8 CRITICAL | Netfilter flowtable 整数下溢漏洞 |
| CVE-2026-80694 | 9.8 CRITICAL | MTK网络驱动 mtk_eth_soc 缺陷 |
| CVE-2026-80681 | 9.8 CRITICAL | Linux Kernel 内核 Vxlan 远程代码执行漏洞 |
| CVE-2026-80674 | 9.8 CRITICAL | NTFS 文件系统属性列表验证与校验器增强 |
| CVE-2026-80673 | 9.8 CRITICAL | NTFS 属性查找中前瞻条目越界读取漏洞 |
| CVE-2026-80668 | 9.8 CRITICAL | Netfilter nf_conntrack 期望回收机制更新 |
| CVE-2026-80617 | 9.8 CRITICAL | Linux 内核 airoha 驱动堆缓冲区溢出漏洞 |
| CVE-2026-80612 | 9.8 CRITICAL | Linux 内核 lwtunnel 封装前丢弃元数据 |
| CVE-2026-80714 | 9.8 CRITICAL | IPVS 同步连接标志处理缺陷 |
| CVE-2026-80609 | 9.8 CRITICAL | qede 驱动 cqe 越界检查修复 |
| CVE-2026-80600 | 9.8 CRITICAL | batman-adv 数据转发 缓冲区溢出漏洞 |
| CVE-2026-80693 | 9.3 CRITICAL | iDPF 中断向量寄存器数组填充越界 |
| CVE-2026-80684 | 9.3 CRITICAL | KVM s390 PCI AIBV 分配失败空指针解引用 |
| CVE-2026-80671 | 9.3 CRITICAL | Linux内核 perf sched 缓冲区溢出漏洞 |
| CVE-2026-80603 | 9.1 CRITICAL | Linux内核 netfilter IRC模块越界读取漏洞 |
| CVE-2026-80670 | 9.1 CRITICAL | Linux 内核 perf 工具 CPU 拓扑解析修复 |
| CVE-2026-80721 | 8.8 HIGH | Linux Bluetooth ISO 悬空引用漏洞 |
| CVE-2026-80722 | 8.8 HIGH | Wi-Fi mac80211 参数校验漏洞 |
| CVE-2026-80724 | 8.8 HIGH | Linux内核 ptp 模块只读映射可写漏洞 |
| CVE-2026-80683 | 8.8 HIGH | Linux 蓝牙SCO套接字引用计数缺陷 |
显示前 20 条，共 135 条。 查看全部 → →
IV. Related Vulnerabilities
V. Comments for CVE-2026-80630
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