CVE-2026-99028— Xilinx AXIENET 驱动 DMA 停止时释放缓冲区漏洞
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: xilinx: axienet：在 dmaengine 停止时释放未完成的 DMA 缓冲区 在 dmaengine 路径中，该驱动程序会预先提交接收（RX）缓冲区，并保留正在传输中的发送（TX）缓冲区；这些缓冲区对应的 SKB（套接字缓冲区）由驱动程序进行 DMA 映射，且仅在完成回调中释放。当调用 时， 会中止这些描述符，但不会执行其回调函数。随后，驱动程序仅释放环形缓冲区的“外壳”，导致每个 操作都会泄漏仍由 dmaengine 拥有且已进行 DMA 映射
影响版本矩阵 10
| 厂商 | 产品 | 版本范围 | 状态 |
|---|---|---|---|
| Linux | Linux | 6a91b846af85a24241decd686269e8e038eb13d1< 079396129da5e7cb40ca0920aa1b9525bef6097c |
affected |
6a91b846af85a24241decd686269e8e038eb13d1< eececf7c3a679d9c08175ad6bacbc8c31848f5af |
affected | ||
6a91b846af85a24241decd686269e8e038eb13d1< 5e5cf3ad7c099ff86ea9e422cddb25a2e5317b58 |
affected | ||
6a91b846af85a24241decd686269e8e038eb13d1< bcf2573a68a808a5b54cadafa72b6672e662c2bf |
affected | ||
6.8 |
affected | ||
< 6.8 |
unaffected | ||
6.12.114≤ 6.12.* |
unaffected | ||
6.18.58≤ 6.18.* |
unaffected | ||
| … +2 条更多 | |||
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一、 漏洞 CVE-2026-99028 基础信息
漏洞信息
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Vulnerability Title
net: xilinx: axienet: Free outstanding DMA buffers on dmaengine stop
来源: CVE Program / CVE List V5
Vulnerability Description
In the Linux kernel, the following vulnerability has been resolved:
net: xilinx: axienet: Free outstanding DMA buffers on dmaengine stop
In the dmaengine path the driver pre-submits RX buffers and holds
in-flight TX buffers whose SKBs are DMA-mapped by the driver and freed
only in the completion callbacks. On ndo_stop() dmaengine_terminate_sync()
aborts these descriptors without running their callbacks, and the driver
then frees only the ring shells, leaking every SKB still owned by the
engine and its DMA mapping on each ifdown. With 128 RX buffers pre-posted
per channel, the mapping leak can eventually exhaust a limited IOMMU
aperture.
Clear the slot's skb in the TX and RX callbacks so a non-NULL skb marks a
slot that still owns a live, DMA-mapped buffer, and on stop unmap and free
every such buffer.
axienet_dma_rx_cb() runs from the DMA tasklet and re-arms the RX ring on
each completion, so it can race axienet_stop(): a completion may submit a
fresh buffer after dmaengine_terminate_sync() has returned, leaving the
channel armed with a buffer the teardown then frees while the engine may
still write into it (dma_release_channel() does not stop it either). Add a
lock that axienet_dma_rx_cb() holds across the @stopping check and the
resubmit, and axienet_stop() holds to set @stopping before terminating.
Once @stopping is set no callback can arm a new buffer, and any armed just
before is aborted by the terminate, so teardown only frees buffers the
engine no longer owns.
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-2026-99028 的公开POC
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CVE-2026-99028 补丁与修复 (4)
同批安全公告 · Linux · 2026-10-23 · 共 217 条
| CVE-2026-98959 | 9.8 CRITICAL | btrfs 扩展属性替换处理远程代码执行漏洞 |
| CVE-2026-99078 | 9.8 CRITICAL | Mellanox mlx5e MPWQE重试时XSK缓冲区释放漏洞 |
| CVE-2026-99079 | 9.8 CRITICAL | Mellanox mlx5e 驱动 XSK 缓冲区释放漏洞 |
| CVE-2026-98988 | 8.8 HIGH | Linux 5.13 命名空间越界漏洞 |
| CVE-2026-99083 | 8.8 HIGH | ksmbd 的 krb5_authenticate() 函数堆越界写漏洞 |
| CVE-2026-99082 | 8.8 HIGH | KVM x86 内存管理漏洞 |
| CVE-2026-98870 | 8.8 HIGH | ksmbd 会话清理时存在通道移除逻辑漏洞 |
| CVE-2026-98980 | 8.8 HIGH | namei 遍历中过度挂载条目信息泄露漏洞 |
| CVE-2026-98981 | 8.8 HIGH | Linux 内核命名空间 dentry 解挂载前未哈希漏洞 |
| CVE-2026-99042 | 8.4 HIGH | io_uring 24 字节 sockaddr_in6 过滤字段填充漏洞 |
| CVE-2026-98978 | 8.4 HIGH | Linux 命名空间 锁定挂载永不失效漏洞 |
| CVE-2026-99064 | 8.1 HIGH | CIPSO 缓存选项偏移调整漏洞 |
| CVE-2026-98968 | 8.1 HIGH | AMT 中继通用查询远程代码执行漏洞 |
| CVE-2026-98899 | 7.8 HIGH | Linux netfilter ipset 竞态条件漏洞 |
| CVE-2026-99018 | 7.8 HIGH | RISC-V 内核影子调用栈加载逻辑缺陷 |
| CVE-2026-99002 | 7.8 HIGH | vmwgfx 驱动用户空间 pitch 参数验证漏洞 |
| CVE-2026-99016 | 7.8 HIGH | RISC-V futex 用户指针未去标签原子访问漏洞 |
| CVE-2026-99051 | 7.8 HIGH | fsverity 信息结构释放延迟漏洞 |
| CVE-2026-99032 | 7.8 HIGH | Linux 内核 SMC 模块 信息泄露漏洞 |
| CVE-2026-98999 | 7.8 HIGH | Intel Xe DRM 驱动程序链接表项失效漏洞 |
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