CVE-2026-99130— Linux io_uring 拒绝服务漏洞
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： io_uring/cancel：避免在任务无法执行本地工作时自旋 io_uring_cancel_generic() 函数在退出任务的 tctx 上下文中，若任何 io_uring 环上仍有待处理的本地工作，则拒绝进入睡眠状态。该函数假设当前任务即为该环的提交者，并认为下一轮 io_uring_try_cancel_requests() 调用将执行这些本地工作。然而，这一假设并不适用于在任务通过 io_uring_create() 或 io_ringfd_registe
可能的 ATT&CK 技术 1 AI
T1499.001 · OS Exhaustion Flood影响版本矩阵 8
| 厂商 | 产品 | 版本范围 | 状态 |
|---|---|---|---|
| Linux | Linux | 360cd42c4e95ff06d8d7b0a54e42236c7e7c187f< 94d13387b96e50a4288f7bbdfe401189246a11a1 |
affected |
360cd42c4e95ff06d8d7b0a54e42236c7e7c187f< 3005459e0ddfcef0f555b6e81f672f2c49a1c0aa |
affected | ||
360cd42c4e95ff06d8d7b0a54e42236c7e7c187f< fddcf4c5321b3ea5f72166c3fd36a9d1c34f80c7 |
affected | ||
6.4 |
affected | ||
< 6.4 |
unaffected | ||
6.18.59≤ 6.18.* |
unaffected | ||
7.2.13≤ 7.2.* |
unaffected | ||
7.3≤ * |
unaffected |
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一、 漏洞 CVE-2026-99130 基础信息
漏洞信息
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Vulnerability Title
io_uring/cancel: don't spin on local work the task can't run
来源: CVE Program / CVE List V5
Vulnerability Description
In the Linux kernel, the following vulnerability has been resolved:
io_uring/cancel: don't spin on local work the task can't run
io_uring_cancel_generic() refuses to sleep while any ring on the exiting
task's tctx has local work pending. It assumes the task is that ring's
submitter and that the next io_uring_try_cancel_requests() pass will run
the work. This does not hold for a ring that was still
IORING_SETUP_R_DISABLED when the task got its tctx node from
io_uring_create() or io_ringfd_register(). The submitter is set later by
IORING_REGISTER_ENABLE_RINGS, possibly from another task, and only the
submitter may run local work on an IORING_SETUP_DEFER_TASKRUN ring. To
the exiting task the work stays pending forever, the loop never reaches
schedule(), and the task trips the WARN_ON_ONCE() once and then spins in
do_exit().
An unprivileged user can set this up at will by creating a disabled
ring, having a child enable it and stop, posting to the ring with
IORING_OP_MSG_RING and exiting with a request in flight that only the
child can complete. The exiting thread burns a CPU until the child runs
or dies, and with panic_on_warn set the WARN panics the kernel.
Fix by skipping the sleep only when io_allowed_defer_tw_run() allows the
task to run the work. This is reasonable since work it cannot run cannot
complete any of its requests either, so nothing is lost by sleeping.
Drop the WARN_ON_ONCE() since handing a disabled ring to another thread
is a supported scenario, not a bug state.
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-2026-99130 的公开POC
| # | POC 描述 | 源链接 | 神龙链接 |
|---|
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CVE-2026-99130 补丁与修复 (1)
同批安全公告 · Linux · 2026-10-28 · 共 117 条
| CVE-2026-99144 | Linux Kernel sched_ext 释放后使用漏洞 | |
| CVE-2026-99129 | SELinux BPF 令牌权限检查漏洞 | |
| CVE-2026-99131 | XFS 文件系统权限检查绕过漏洞 | |
| CVE-2026-99133 | Linux 内核网络 IUCV 远程拒绝服务漏洞 | |
| CVE-2026-99132 | XFS xfs_sync_sb_buf 缓冲区锁竞争漏洞 | |
| CVE-2026-99134 | mac802154 数据竞争与空指针解引用漏洞 | |
| CVE-2026-99135 | dm-integrity 大标签丢弃无限循环漏洞 | |
| CVE-2026-99137 | CIFS 文件系统在无缓存句柄时更新 i_size 存在漏洞 | |
| CVE-2026-99136 | dm-crypt 竞态条件漏洞 | |
| CVE-2026-99138 | Linux TCP 协议栈 use-after-free 漏洞 | |
| CVE-2026-99140 | tracing 模块缓冲区事件时间戳修复 | |
| CVE-2026-99139 | TCP 协议栈 TCP_CONGESTION 选项后释放漏洞 | |
| CVE-2026-99141 | 内核 tracing 模块 print_graph_function_event 崩溃漏洞 | |
| CVE-2026-99142 | Tracing 组件栈容量检查缺失漏洞 | |
| CVE-2026-99143 | Linux 内核 tracing 组件越界访问漏洞 | |
| CVE-2026-99156 | Linux SCSI st 驱动 use-after-free 漏洞 | |
| CVE-2026-99153 | libiscsi 拒绝 PDU 验证逻辑漏洞 | |
| CVE-2026-99152 | libiscsi 管理响应任务验证绕过漏洞 | |
| CVE-2026-99154 | libiscsi 负任务索引拒绝漏洞 | |
| CVE-2026-99151 | AMD Display 驱动 NULL 指针解引用漏洞 |
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