CVE-2026-90071— sch_teql模块skb设备恢复失败漏洞
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。
在 Linux 内核中，以下漏洞已得到修复： net/sched: sch_teql: 在从设备失败路径上恢复 skb->dev 在调用从设备的 之前，会将 设置为该从设备，但如果该发送操作失败，却从未将 恢复为原来的设备。这导致该 skb 继续传递到下一个从设备时，其 仍指向前一个从设备。 如果后续某个从设备没有已解析的邻居（neighbour）， 会将该 skb 交给 ，后者将其入队到该邻居的 中，但此时 仍然是一个过期的（stale）指针。由于 并不持有对网络设备（net_device）的引用计数，因此当之前
可能的 ATT&CK 技术 1 AI
T1203 · Exploitation for Client Execution影响版本矩阵 26
| 厂商 | 产品 | 版本范围 | 状态 |
|---|---|---|---|
| Linux | Linux | 383493b9940e3d1b5517424081b3e072e20ec43c< 1360bc93f5be1be3cf937ebea667b3418dd30a79 |
affected |
6b1f563d670162e188a0f2aec39c24b67b106e17< d453bf439ef230b5743afc25e194adacca8c6e43 |
affected | ||
57c153249143333bbf4ecf927bdf8aa2696ee397< 012559cf3c67ce8825a31d4f66b040b6fbaf775e |
affected | ||
59b06d8b9bdb6b64b3c534c18da68bce5ccd31be< aa39a790d56b40bfcf3861653ceb46a3a113adb6 |
affected | ||
81a43e8005366f16e629d8c95dfe05beaa8d36a7< 00d8a387b23b7831ad9919256a6b9caaa10f19c3 |
affected | ||
0bad9c86edd22dec4df83c2b29872d66fd8a2ff4< 96bc345a3f17543d0d92ada609e02198d6380e26 |
affected | ||
0cc0c2e661af418bbf7074179ea5cfffc0a5c466< 0cd75037948567193f7f5767176538822ce23873 |
affected | ||
0cc0c2e661af418bbf7074179ea5cfffc0a5c466< dc4b95b8fee95113587e93ca116356032d271371 |
affected | ||
| … +18 条更多 | |||
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一、 漏洞 CVE-2026-90071 基础信息
漏洞信息
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Vulnerability Title
net/sched: sch_teql: restore skb->dev on the slave failure path
来源: CVE Program / CVE List V5
Vulnerability Description
In the Linux kernel, the following vulnerability has been resolved:
net/sched: sch_teql: restore skb->dev on the slave failure path
teql_master_xmit() sets skb->dev = slave before calling the slave's
ndo_start_xmit(), but never restores it when that transmit fails. The
skb then walks on to the next slave still pointing at the previous one.
If a later slave has no resolved neighbour, teql_resolve() hands the skb
to neigh_event_send(), which queues it on that neighbour's arp_queue
with the stale skb->dev. skb->dev holds no reference, so deleting the
previous slave frees the net_device while the skb is still queued.
Whatever runs next on that skb - arp_error_report() on timeout, or
neigh_direct_output() -> dev_queue_xmit() once the neighbour resolves -
causes a UAF like the one below:
BUG: KASAN: slab-use-after-free in __icmp_send (net/ipv4/icmp.c:914 (discriminator 2))
Read of size 4 at addr ffff888106e100b0 by task flood_packet/527
CPU: 0 UID: 0 PID: 527 Comm: flood_packet Not tainted 7.2.0-rc6-g594d90519502 #1 PREEMPT(lazy)
Hardware name: QEMU Ubuntu 24.04 PC v2 (i440FX + PIIX, arch_caps fix, 1996), BIOS 1.16.3-debian-1.16.3-2 04/01/2014
Call Trace:
<IRQ>
dump_stack_lvl (lib/dump_stack.c:94 lib/dump_stack.c:120)
print_report (mm/kasan/report.c:378 mm/kasan/report.c:482)
? __pfx__raw_spin_lock_irqsave (./include/asm-generic/qrwlock.h:122 (discriminator 4))
? __icmp_send (net/ipv4/icmp.c:914 (discriminator 2))
kasan_report (mm/kasan/report.c:595)
? __icmp_send (net/ipv4/icmp.c:914 (discriminator 2))
__icmp_send (net/ipv4/icmp.c:914 (discriminator 2))
[...]
ipv4_link_failure (net/ipv4/route.c:1251 net/ipv4/route.c:1258)
? __pfx_ipv4_link_failure (./include/linux/skbuff.h:4327)
? _raw_write_lock (./include/linux/instrumented.h:55 ./include/linux/atomic/atomic-instrumented.h:1301 ./include/asm-generic/qrwlock.h:98 ./include/linux/rwlock_api_smp.h:230 kernel/locking/spinlock.c:304)
? __pfx__raw_write_lock (kernel/locking/spinlock.c:175)
arp_error_report (./include/net/dst.h:438 net/ipv4/arp.c:296)
neigh_invalidate (net/core/neighbour.c:1077)
neigh_timer_handler (net/core/neighbour.c:1169)
[...]
Allocated by task 505:
kasan_save_stack (mm/kasan/common.c:57)
kasan_save_track (mm/kasan/common.c:78)
__kasan_kmalloc (mm/kasan/common.c:398 mm/kasan/common.c:415)
__kvmalloc_node_noprof (./include/linux/kasan.h:263 mm/slub.c:5334 mm/slub.c:6905)
alloc_netdev_mqs (net/core/dev.c:12055 (discriminator 2))
rtnl_create_link (net/core/rtnetlink.c:3721)
rtnl_newlink (net/core/rtnetlink.c:3903 net/core/rtnetlink.c:4044 net/core/rtnetlink.c:4159)
rtnetlink_rcv_msg (net/core/rtnetlink.c:7076)
[...]
Freed by task 536:
kasan_save_stack (mm/kasan/common.c:57)
kasan_save_track (mm/kasan/common.c:78)
kasan_save_free_info (mm/kasan/generic.c:584)
__kasan_slab_free (mm/kasan/common.c:253 mm/kasan/common.c:285)
kfree (./include/linux/kasan.h:235 mm/slub.c:2677 mm/slub.c:6377 mm/slub.c:6692)
device_release (drivers/base/core.c:2636)
kobject_put (lib/kobject.c:689 lib/kobject.c:720 ./include/linux/kref.h:65 lib/kobject.c:737)
netdev_run_todo (net/core/dev.c:11756)
rtnl_dellink (net/core/rtnetlink.c:157 ./include/linux/rtnetlink.h:135 net/core/rtnetlink.c:3651)
rtnetlink_rcv_msg (net/core/rtnetlink.c:7076)
[...]
Fix this by restoring skb->dev to the master at the end of each slave's
iteration.
来源: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:L/AC:L/PR:L/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-2026-90071 的公开POC
| # | POC 描述 | 源链接 | 神龙链接 |
|---|
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CVE-2026-90071 补丁与修复 (8)
同批安全公告 · Linux · 2026-09-17 · 共 600 条
| CVE-2026-90173 | 9.8 CRITICAL | SMB SmbDirect 释放完成队列漏洞 |
| CVE-2026-90235 | 9.8 CRITICAL | 内核sunrpc xprtsock并发读取修复 |
| CVE-2026-90151 | 9.8 CRITICAL | NFSv4客户端分配失败回调处理漏洞 |
| CVE-2026-92489 | 9.8 CRITICAL | Linux内核 xfrm 双重释放漏洞 |
| CVE-2026-90104 | 9.8 CRITICAL | NFSv4.1 解码前未清空调用列表 |
| CVE-2026-90110 | 9.4 CRITICAL | inetpeer 随机化RB树节点比较 |
| CVE-2026-90413 | 9.1 CRITICAL | IB/isert 登录PDU数据长度校验漏洞 |
| CVE-2026-90414 | 9.1 CRITICAL | IB/isert拒绝声明超出实际接收数据的PDU |
| CVE-2026-90230 | 9.1 CRITICAL | Linux内核Nvme-target堆越界读取漏洞 |
| CVE-2026-90425 | 8.8 HIGH | Linux内核 5.x 内核漏洞 |
| CVE-2026-90286 | 8.8 HIGH | AMDGPU GFX6 计算队列PFP使用漏洞 |
| CVE-2026-93042 | 8.8 HIGH | Linux内核dmaengine模块资源耗尽漏洞 |
| CVE-2026-90329 | 8.8 HIGH | Linux 内核 HID 驱动探测清理同步漏洞 |
| CVE-2026-90256 | 8.8 HIGH | Linux Bluetooth L2CAP 远程代码执行漏洞 |
| CVE-2026-90255 | 8.8 HIGH | Linux内核 Bluetooth 漏洞 |
| CVE-2026-90162 | 8.8 HIGH | Linux ksmbd 锁授予UAF/双重释放竞态漏洞 |
| CVE-2026-90381 | 8.8 HIGH | Linux内核mt76驱动无线信道切换漏洞 |
| CVE-2026-90367 | 8.8 HIGH | Linux内核MT7996驱动死锁漏洞 |
| CVE-2026-90371 | 8.8 HIGH | mt76 无线驱动 RXDMAD_C 竞态修复 |
| CVE-2026-90379 | 8.8 HIGH | Linux 内核 mt76 驱动系统崩溃漏洞 |
显示前 20 条，共 600 条。 查看全部 → →
IV. Related Vulnerabilities
V. Comments for CVE-2026-90071
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