CVE-2026-90081— Linux 内核网络 RDS 拥塞映射更新修复
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，已修复以下漏洞： net/rds：在 rds_cong_map_updated() 中使用 wq_has_sleeper() rds_cong_map_updated() 在对端拥塞映射被重写后执行（由 rds_tcp_cong_recv() 和 rds_ib_cong_recv()，或回环及 IB 发送完成路径中的全量清除触发）。该函数先递增 rds_cong_generation，然后检查 map->m_waitq 和 rds_poll_waitq 上的 waitqueue_active
可能的 ATT&CK 技术 2 AI
T1027 · Obfuscated Files or Information T1059 · Command and Scripting Interpreter影响版本矩阵 18
| 厂商 | 产品 | 版本范围 | 状态 |
|---|---|---|---|
| Linux | Linux | 922cb17a5c812fcc9ebee249f4109db099896941< 2a809d7896dbf18e1ecfbdd930f71c9fc298b16d |
affected |
922cb17a5c812fcc9ebee249f4109db099896941< fa4b98e891fda28cc0638d809c6125ec63d8319d |
affected | ||
922cb17a5c812fcc9ebee249f4109db099896941< 0e169f6a2adeb17b5577ed7e8abd642465bb50ec |
affected | ||
922cb17a5c812fcc9ebee249f4109db099896941< 42884bd8b8fd023d6a610a695bd5ddd1d5dece17 |
affected | ||
922cb17a5c812fcc9ebee249f4109db099896941< a526214b9f0548ca0e53a6e0d1727d8ea9befc23 |
affected | ||
922cb17a5c812fcc9ebee249f4109db099896941< bf2b8130723efcb5b86c3ddb6317c3a9b2a9cfc5 |
affected | ||
922cb17a5c812fcc9ebee249f4109db099896941< 281f9fda2e06d6c211bb365a5379ed2e05cc2e21 |
affected | ||
922cb17a5c812fcc9ebee249f4109db099896941< d4f484661961636eb90d287050959e613795f73a |
affected | ||
| … +10 条更多 | |||
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一、 漏洞 CVE-2026-90081 基础信息
漏洞信息
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Vulnerability Title
net/rds: use wq_has_sleeper() in rds_cong_map_updated()
来源: CVE Program / CVE List V5
Vulnerability Description
In the Linux kernel, the following vulnerability has been resolved:
net/rds: use wq_has_sleeper() in rds_cong_map_updated()
rds_cong_map_updated() runs after a peer's congestion map has been
rewritten (by rds_tcp_cong_recv() and rds_ib_cong_recv(), or the
clear-all in the loopback and IB send-completion paths). It bumps
rds_cong_generation and then checks waitqueue_active() on
map->m_waitq and on rds_poll_waitq to decide whether anyone needs
waking. atomic_inc() carries no ordering and waitqueue_active() is a
plain load, so nothing orders the map and generation stores before
the wait queue reads. The waiters do the mirror image: rds_cong_wait()
adds itself to m_waitq and then tests the port bit, and rds_poll()
registers on rds_poll_waitq and then reads the generation. That is
the store-buffering pattern described above waitqueue_active() in
include/linux/wait.h - the updater can observe an empty wait queue
while the waiter still observes the port as congested, and no wake-up
is issued.
rds_cong_wait() is an interruptible sleep with no timeout, so a
sender blocked on a congested port stays blocked until the next
congestion update from that peer arrives or a signal is delivered.
A poll() waiter misses the map-updated notification the same way.
Use wq_has_sleeper(), which is waitqueue_active() preceded by the
required full barrier, as rds_tcp_state_change() already does for
the same pattern.
来源: CVE Program / CVE List V5
CVSS Information
N/A
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-2026-90081 的公开POC
| # | POC 描述 | 源链接 | 神龙链接 |
|---|
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CVE-2026-90081 补丁与修复 (7)
CVE-2026-90081 其他参考 (1)
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-2026-92489 | 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-2026-90235 | 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-2026-90110 | 9.4 CRITICAL | inetpeer 随机化RB树节点比较 |
| CVE-2026-90414 | 9.1 CRITICAL | IB/isert拒绝声明超出实际接收数据的PDU |
| CVE-2026-90413 | 9.1 CRITICAL | IB/isert 登录PDU数据长度校验漏洞 |
| CVE-2026-90230 | 9.1 CRITICAL | Linux内核Nvme-target堆越界读取漏洞 |
| CVE-2026-90381 | 8.8 HIGH | Linux内核mt76驱动无线信道切换漏洞 |
| CVE-2026-90329 | 8.8 HIGH | Linux 内核 HID 驱动探测清理同步漏洞 |
| CVE-2026-90162 | 8.8 HIGH | Linux ksmbd 锁授予UAF/双重释放竞态漏洞 |
| CVE-2026-90357 | 8.8 HIGH | mt76驱动MT7915无线局域网远程拒绝服务漏洞 |
| 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-2026-93042 | 8.8 HIGH | Linux内核dmaengine模块资源耗尽漏洞 |
| CVE-2026-90425 | 8.8 HIGH | Linux内核 5.x 内核漏洞 |
| CVE-2026-90240 | 8.8 HIGH | Linux内核 IOMMU 别名拆除时刷新缓存错误 |
| CVE-2026-90379 | 8.8 HIGH | Linux 内核 mt76 驱动系统崩溃漏洞 |
| CVE-2026-90256 | 8.8 HIGH | Linux Bluetooth L2CAP 远程代码执行漏洞 |
显示前 20 条，共 600 条。 查看全部 → →
IV. Related Vulnerabilities
V. Comments for CVE-2026-90081
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