CVE-2026-99079— Mellanox mlx5e 驱动 XSK 缓冲区释放漏洞
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/mlx5e：防止在 refill 重试时释放过期的 XSK 缓冲区 当 XDP 重定向到 AF_XDP 套接字因接收（RX）环形缓冲区已满而失败时，XSK 核心会释放该缓冲区。随后，在对传统循环接收队列（legacy cyclic RQ）执行批量 refill 操作时，mlx5e 驱动会在分配新缓冲区之前，先释放工作队列项（WQE）关联的 XSK 缓冲区。如果该 refill 操作仅部分成功，某些未被分配新缓冲区的 WQE 将保留其旧的缓冲区指针。 与此同时，该
可能的 ATT&CK 技术 1 AI
T1069.006影响版本矩阵 12
| 厂商 | 产品 | 版本范围 | 状态 |
|---|---|---|---|
| Linux | Linux | 3f93f82988bc6b4104314bf9aa485d47fbb7e241< 32bbb870078d467479965c21bbc4960c57eea208 |
affected |
3f93f82988bc6b4104314bf9aa485d47fbb7e241< 34d1db2b18e1c1d189e34dd51923e031815f88e3 |
affected | ||
3f93f82988bc6b4104314bf9aa485d47fbb7e241< 639522e5056cade578a324acfa993ec6c9f7f5dc |
affected | ||
3f93f82988bc6b4104314bf9aa485d47fbb7e241< 655f47477054d19de3b138840be229a1a4490d0c |
affected | ||
3f93f82988bc6b4104314bf9aa485d47fbb7e241< e01620844c5c88b6fcf819d171df8e3976a0e76f |
affected | ||
6.4 |
affected | ||
< 6.4 |
unaffected | ||
6.6.160≤ 6.6.* |
unaffected | ||
| … +4 条更多 | |||
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一、 漏洞 CVE-2026-99079 基础信息
漏洞信息
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Vulnerability Title
net/mlx5e: Prevent stale XSK buffer release on refill retry
来源: CVE Program / CVE List V5
Vulnerability Description
In the Linux kernel, the following vulnerability has been resolved:
net/mlx5e: Prevent stale XSK buffer release on refill retry
When an XDP redirect to an AF_XDP socket fails because its RX ring is
full, the XSK core frees the buffer. During the subsequent batched refill
of a legacy cyclic RQ, mlx5e also releases the WQE's XSK buffer before
allocating a replacement. If that refill succeeds only partially, a WQE
left without a replacement retains its old buffer pointer.
The buffer can meanwhile be allocated to another WQE. A later refill
retry can then free the live buffer through the stale pointer and publish
the same UMEM frame twice.
Mark the WQE as released immediately after the driver-side free. The flag
is already cleared when a replacement buffer is assigned, so refill
retries no longer release stale pointers.
The failure is silent and produces no kernel warning or splat. A
standalone legacy cyclic-RQ zero-copy libxsk reproducer, using 64-byte UDP
traffic offered at 12 Mpps, detected it: stock stopped after 2,854,914
packets in 4.094 seconds, with 4,542 xdp_rx_ring_full events and 64
ownership/double-publication errors. With this change it processed
356,904,225 packets in 30 seconds despite 571,405 xdp_rx_ring_full events,
with no ownership or data errors.
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-2026-99079 的公开POC
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|---|
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CVE-2026-99079 补丁与修复 (2)
同批安全公告 · Linux · 2026-10-23 · 共 218 条
| CVE-2026-98937 | Linux 内核 perf 远程代码执行漏洞 | |
| CVE-2026-98950 | Linux kernel flow_dissector 整数截断漏洞 | |
| CVE-2026-98949 | Imagination DRM 驱动 remap() 函数引用及 vm_bo 处理漏洞 | |
| CVE-2026-98948 | Mellanox mlxsw 端口范围寄存器泄漏漏洞 | |
| CVE-2026-98947 | vsock 内存泄漏漏洞 | |
| CVE-2026-98946 | V3D 驱动运行时挂起中断禁用漏洞 | |
| CVE-2026-98945 | Steam HID 驱动解绑顺序漏洞 | |
| CVE-2026-98944 | Steam HID 注册重构漏洞 | |
| CVE-2026-98943 | Steam HID 驱动锁清理 | |
| CVE-2026-98942 | Linux 内核 sched_ext 远程代码执行漏洞 | |
| CVE-2026-98941 | ext4 加密 inode 大页启用逻辑漏洞 | |
| CVE-2026-98940 | Linux 内核 ASoC 组件越界读取漏洞 | |
| CVE-2026-98939 | Linux x86/mm 内存管理逻辑缺陷 | |
| CVE-2026-98938 | Rust IRQ 请求机制参数传递漏洞 | |
| CVE-2026-98926 | AMD Display 驱动 DPMS 电源管理漏洞 | |
| CVE-2026-98929 | macsec 在注册前初始化 SecY 的竞态条件漏洞 | |
| CVE-2026-98928 | KVM arm64 信息泄露漏洞 | |
| CVE-2026-98927 | KVM arm64 嵌套 MMU 数组生命周期漏洞 | |
| CVE-2026-98930 | KVM s390 中断注入漏洞 | |
| CVE-2026-98925 | Linux bpf sockmap 序列号重复计数漏洞 |
显示前 20 条，共 218 条。 查看全部 → →
IV. Related Vulnerabilities
V. Comments for CVE-2026-99079
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