CVE-2026-99264— Linux io_uring 拒绝重试未提交缓冲区的接收
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/net：不要在未提交的缓冲区上重试接收操作 提交 41b70df5b38b（"io_uring/net: 在重试时提交部分缓冲区"）在发生部分传输后需要重试接收操作时，会提交环形缓冲区（ring）中提供的缓冲区。这样做的目的是防止另一个使用同一缓冲区组的请求被分配给第一个请求仍在写入的内存区域。该提交会提交截至目前已接收的字节数。这对于单个被整体消耗的缓冲区是有效的，但该请求仍保留对其已映射的所有缓冲区的引用： 对于仅使用 的缓冲区环，只有这些已接收的
影响版本矩阵 17
| 厂商 | 产品 | 版本范围 | 状态 |
|---|---|---|---|
| Linux | Linux | fe9da1812f8697a38f7e30991d568ec199e16059< 21cb1770a56a51266ab96d4ed2a3b6979db59694 |
affected |
41b70df5b38bc80967d2e0ed55cc3c3896bba781< fc8506eea4498ecba26ef8bf6dbbd74af3dc891d |
affected | ||
41b70df5b38bc80967d2e0ed55cc3c3896bba781< 97b8dc36ba3cb176b74a7929140aeaeb40d5cdc0 |
affected | ||
41b70df5b38bc80967d2e0ed55cc3c3896bba781< 8444de681a179e41a4eb92d5bbe770a0677074a6 |
affected | ||
3b53dc1c641f2884d4750fc25aaf6c36b90db606 |
affected | ||
21a4ddb0f5e933f372808c10b9ac704505751bb1 |
affected | ||
2eb7937b5fc7fcd90eab7bebb0181214b61b9283 |
affected | ||
6.12.44< 6.12.115 |
affected | ||
| … +9 条更多 | |||
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一、 漏洞 CVE-2026-99264 基础信息
漏洞信息
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Vulnerability Title
io_uring/net: don't retry recv on uncommitted buffers
来源: CVE Program / CVE List V5
Vulnerability Description
In the Linux kernel, the following vulnerability has been resolved:
io_uring/net: don't retry recv on uncommitted buffers
Commit 41b70df5b38b ("io_uring/net: commit partial buffers on retry")
commits ring provided buffers when a receive is going to be retried after
a partial transfer, so that another request using the same buffer group
can't be handed the memory the first one keeps receiving into. It commits
the number of bytes received so far. That does the job for a single
buffer which is consumed as a whole, but the request hangs on to all it
has mapped:
- For a buffer ring with IOU_PBUF_RING_INC only these bytes are consumed.
The rest of the buffer stays at the head of the ring.
- For a bundle only the buffers which hold these bytes are consumed, the
others that were peeked stay in the ring.
In both cases the next receive with that buffer group gets memory that
the retried request is still going to write to, and whoever comes last
overwrites the data of the other. What the retry fills isn't committed at
all, as the buffer list isn't known any more at that point. So the kernel
hands it out again later on, while the CQE tells the application that it
was used, and for an incremental buffer that it is done with.
The remainder can't be committed in advance: if the request ends up
receiving less, there is no way to tell the application that more was
consumed than the CQE accounts for. Complete the request with what it has
got instead of retrying it. MSG_WAITALL is no longer honoured for
receives into incremental buffers or multi buffer bundles, they can
return a short count, with the request marked as failed like for other
short MSG_WAITALL transfers.
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-2026-99264 的公开POC
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CVE-2026-99264 其他参考 (4)
同批安全公告 · Linux · 2026-11-03 · 共 28 条
| CVE-2026-99270 | 8.1 HIGH | Linux TCP 潜在释放后重用漏洞 |
| CVE-2026-99246 | 8.1 HIGH | Linux TIPC 节点重置追踪转储竞争条件漏洞 |
| CVE-2026-99269 | 7.8 HIGH | Linux sched_ext 任务调度逻辑缺陷 |
| CVE-2026-99243 | io-wq 工作线程创建退出位排序漏洞 | |
| CVE-2026-99245 | Linux 内核 key_reject_and_link 竞态漏洞 | |
| CVE-2026-99244 | Linux pid_namespace 信号中断漏洞 | |
| CVE-2026-99248 | xiic 驱动运行时电源管理时钟警告漏洞 | |
| CVE-2026-99247 | tracing 组件远程代码执行漏洞 | |
| CVE-2026-99249 | Linux 内核 pid_namespace 冻结漏洞 | |
| CVE-2026-99250 | Linux 内核 kthread 启动延迟漏洞 | |
| CVE-2026-99251 | Hyper-V 驱动无限重试循环漏洞 | |
| CVE-2026-99252 | Linux Kernel io_uring 拒绝服务漏洞 | |
| CVE-2026-99253 | Linux 内核 io_uring 竞态条件漏洞 | |
| CVE-2026-99255 | Linux 内核 io_uring 竞态条件漏洞 | |
| CVE-2026-99254 | Linux io_uring 拒绝任务取消时任务工作洪泛漏洞 | |
| CVE-2026-99257 | Linux GPIO 共享设备查找处理漏洞 | |
| CVE-2026-99256 | dm cache 后台工作锁机制漏洞 | |
| CVE-2026-99259 | Tegra PMC 时钟速率未初始化漏洞 | |
| CVE-2026-99258 | Linux x86 Hyper-V 内核信息泄露漏洞 | |
| CVE-2026-99260 | NTFS 属性标志转换逻辑漏洞 |
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