CVE-2026-98072— Linux内核网络子系统release_in_xmit函数使用wq_has_sleeper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/rds: 在 release_in_xmit() 中使用 wq_has_sleeper() 函数通过 清除 RDS_IN_XMIT 标志，然后检查 以判断是否需要唤醒等待者。然而， 仅是一个释放（release）操作：它对位清除之前的临界区进行了排序，但并未对之后的等待队列头部的普通加载操作进行排序。等待方则执行镜像操作——先将自身添加到等待队列，然后测试该标志位。这构成了经典的存储缓冲（store-buffering）模式：释放方 CPU 可能读到等待队列为空
可能的 ATT&CK 技术 1 AI
T1053 · Scheduled Task/Job影响版本矩阵 30
| 厂商 | 产品 | 版本范围 | 状态 |
|---|---|---|---|
| Linux | Linux | 1e1e4316fcaeb9cd6bc56c91127e88625237dd44< 6f552364d97cf4005c7a58f11c9f79e14e269865 |
affected |
8c378cc522aedd5fa5aa53486b43a4d552fbbd5c< a94b1dfc82454c5bc068e71c25393af674daf63b |
affected | ||
52287ed416a10bc3d3e204a3186d9509ab3ee634< 5a806ed1eb46850ca4159a18b2a8c4b70f0c1341 |
affected | ||
4a4dffdff9ea6201665f5d0a5042011d09bd527f< 3d401934b7edb3ccb07d982dabadd04c45ee307c |
affected | ||
1422f28826d2a0c11e5240b3e951c9e214d8656e< ed7ee0cd0e136d02f87f13181b1a89880463c7e9 |
affected | ||
1422f28826d2a0c11e5240b3e951c9e214d8656e< a269795107f45adc95975a83324f8fef40bec4ce |
affected | ||
1422f28826d2a0c11e5240b3e951c9e214d8656e< 3764627b30a283e611e652c4a2bb8cdc74a75a99 |
affected | ||
1422f28826d2a0c11e5240b3e951c9e214d8656e< 6d0c8b7073913011459cf968cbbadd341e166bc3 |
affected | ||
| … +22 条更多 | |||
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一、 漏洞 CVE-2026-98072 基础信息
漏洞信息
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Vulnerability Title
net/rds: use wq_has_sleeper() in release_in_xmit()
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 release_in_xmit()
release_in_xmit() clears RDS_IN_XMIT with clear_bit_unlock() and then
checks waitqueue_active() to decide whether anyone needs waking.
clear_bit_unlock() is only a release operation: it orders the
critical section before the bit clear, but does not order the
subsequent plain load of the wait queue head after it. The waiter
side does the mirror image - it adds itself to the wait queue and
then tests the bit. That is the classic store-buffering pattern: the
releasing CPU can read the wait queue as empty while the waiting CPU
still reads the bit as set, so the sleeper is never woken.
The waiters are rds_conn_shutdown() and rds_tcp_reset_callbacks(),
both in uninterruptible wait_event() with no timeout. A lost wake-up
strands the shutdown worker on its single-threaded workqueue until
some other sender releases the bit again - and on a connection that
is being torn down precisely because it failed, there may never be
another sender.
The barrier used to be there: release_in_xmit() did clear_bit()
followed by smp_mb__after_atomic() until commit 1422f28826d2 ("rds:
introduce acquire/release ordering in acquire/release_in_xmit()")
folded both into clear_bit_unlock(), which strengthened the lock
hand-off but silently dropped the full barrier the wake-up check
depends on. The refill counterpart, release_refill() in
net/rds/ib_recv.c, still carries its smp_mb__after_atomic() for
exactly this reason.
Use wq_has_sleeper(), which is waitqueue_active() preceded by the
required full barrier.
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-2026-98072 的公开POC
| # | POC 描述 | 源链接 | 神龙链接 |
|---|
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CVE-2026-98072 补丁与修复 (8)
同批安全公告 · Linux · 2026-09-25 · 共 372 条
| CVE-2026-100075 | 9.8 CRITICAL | RDMA/srpt：srpt_alloc_rw_ctxs() 未释放计数器修复 |
| CVE-2026-97555 | 8.8 HIGH | smb客户端：修复DACL所有者/组重写中的堆溢出漏洞 |
| CVE-2026-97957 | 8.8 HIGH | hinic 邮箱段缓冲区溢出漏洞 |
| CVE-2026-97527 | 8.8 HIGH | qla2xxx SCSI驱动程序 NVMe未解决上下文列表竞争条件漏洞 |
| CVE-2026-97528 | 8.8 HIGH | QLogic qla2xxx驱动LS拒绝错误NVMe内存泄漏漏洞 |
| CVE-2026-98115 | 8.8 HIGH | ksmbd 注销期间会话安全排空漏洞 |
| CVE-2026-97525 | 8.2 HIGH | x86/mm/pat：内核页表分裂页表分配漏洞 |
| CVE-2026-98069 | 8.1 HIGH | Net/RDS rds_conn_shutdown() 快速路径锁获取漏洞 |
| CVE-2026-97573 | 8.1 HIGH | bnxt_en 驱动 bnxt_rx_ring_reset 缓冲区分配失败漏洞 |
| CVE-2026-97570 | 8.1 HIGH | bnxt_en: 修复因SW TPA ID绑定问题导致的崩溃漏洞 |
| CVE-2026-98130 | 8.1 HIGH | SCTP定时器启动竞争条件漏洞 |
| CVE-2026-98070 | 8.1 HIGH | Linux RDS 模块远程代码执行漏洞 |
| CVE-2026-98002 | 7.8 HIGH | AMD IOMMU 嵌套域分配中错误检查失效漏洞 |
| CVE-2026-97575 | 7.8 HIGH | v4l2-ctrls AV1瓦片计数验证漏洞 |
| CVE-2026-97576 | 7.8 HIGH | V4L2-ctrls HEVC 瓦片计数验证漏洞 |
| CVE-2026-97941 | 7.8 HIGH | Linux 内核 slab 内存分配器竞态条件漏洞 |
| CVE-2026-98112 | 7.8 HIGH | ksmbd 网络接口事件中监听器任务生命周期修复漏洞 |
| CVE-2026-97937 | 7.8 HIGH | Linux内核ftrace远程代码执行漏洞 |
| CVE-2026-97580 | 7.8 HIGH | rkvdec HEVC解析数组越界漏洞 |
| CVE-2026-97940 | 7.8 HIGH | IPv6 修复 fib6 遍历器在 seq 停止时存在 UAF 漏洞 |
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IV. Related Vulnerabilities
V. Comments for CVE-2026-98072
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