CVE-2026-90201— Linux内核4.16.0 使用已释放指针漏洞
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，以下漏洞已被修复： net: page_pool: 修复 xa_cmpxchg 竞争条件下的 __page_pool_release_netmem_dma 使用已释放内存（UAF）问题 该 bug 是在 arm64 架构下，对 hns3 驱动程序进行通道重新配置（ / ）并同时运行 iperf3 流量测试时发现的。当 中的 与另一 CPU 上通过 返回页面的操作并发执行时，该竞争条件会间歇性触发。 中的一个 WARN 警告暴露了由 cmpxchg 失败方残留的悬空 DMA 索引位，从而引导了
可能的 ATT&CK 技术 1 AI
T1202 · Indirect Command Execution影响版本矩阵 13
| 厂商 | 产品 | 版本范围 | 状态 |
|---|---|---|---|
| Linux | Linux | 4f51fb0d257ff4d406ec27966902de075e3b118e< bbfef303f980c1c078b8fa142e10a0e2fbcdd247 |
affected |
ee62ce7a1d909ccba0399680a03c2dee83bcae95< 424a9fc4876cc7f28e9cb0aa8d92e920d726e350 |
affected | ||
ee62ce7a1d909ccba0399680a03c2dee83bcae95< 9b65b0253ad5a66f73efee9a79a21a1e2b57cf59 |
affected | ||
ee62ce7a1d909ccba0399680a03c2dee83bcae95< 24ef02f934eeb48830cff6b739abc3c62b1d107b |
affected | ||
c30ae60f41f9edd6e1b5cad41cf28ce04dae39e4 |
affected | ||
6.12.34< 6.12.110 |
affected | ||
6.15.3< 6.16 |
affected | ||
6.16 |
affected | ||
| … +5 条更多 | |||
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一、 漏洞 CVE-2026-90201 基础信息
漏洞信息
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Vulnerability Title
net: page_pool: fix UAF in __page_pool_release_netmem_dma on xa_cmpxchg race
来源: CVE Program / CVE List V5
Vulnerability Description
In the Linux kernel, the following vulnerability has been resolved:
net: page_pool: fix UAF in __page_pool_release_netmem_dma on xa_cmpxchg race
This bug was discovered while testing the hns3 driver under channel
reconfiguration (`ethtool -L` / `ethtool -G`) with iperf3 traffic on
arm64. The race is intermittently triggered when page_pool_destroy()
runs page_pool_scrub() concurrently with page return via
page_pool_put_netmem() on a different CPU. A WARN in
page_pool_clear_pp_info() surfaced the dangling DMA index bits left
by the cmpxchg loser, which led to the investigation.
page_pool_scrub() iterates pool->dma_mapped via xa_for_each() with no
page ref held. __page_pool_release_netmem_dma() currently reads and
writes netmem fields (dma_addr, DMA index bits in pp_magic) after
xa_cmpxchg() returns. The unref path calls put_page() unconditionally
regardless of the cmpxchg outcome; when it loses the cmpxchg, it still
frees the page before the scrub winner finishes these netmem accesses,
so scrub touches a freed page -- a Use-After-Free.
Fix this by splitting the DMA release into two functions:
1. __page_pool_unmap_netmem_dma() caches dma_addr before xa_cmpxchg(),
does the cmpxchg to remove the DMA mapping, and calls dma_unmap on
the cached address. It never touches netmem fields after the cmpxchg,
making it safe for the scrub path which holds no page ref.
2. __page_pool_release_netmem_dma() wraps the above and additionally
clears dma_addr and DMA index bits in netmem fields. This is safe
only when the caller holds a page ref, so it is used by the return
path (page_pool_return_netmem).
The scrub path calls __page_pool_unmap_netmem_dma() directly; the return
path calls __page_pool_release_netmem_dma().
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-2026-90201 的公开POC
| # | POC 描述 | 源链接 | 神龙链接 |
|---|
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CVE-2026-90201 补丁与修复 (4)
同批安全公告 · Linux · 2026-09-17 · 共 600 条
| CVE-2026-90235 | 9.8 CRITICAL | 内核sunrpc xprtsock并发读取修复 |
| CVE-2026-90104 | 9.8 CRITICAL | NFSv4.1 解码前未清空调用列表 |
| CVE-2026-90173 | 9.8 CRITICAL | SMB SmbDirect 释放完成队列漏洞 |
| CVE-2026-92489 | 9.8 CRITICAL | Linux内核 xfrm 双重释放漏洞 |
| CVE-2026-90151 | 9.8 CRITICAL | NFSv4客户端分配失败回调处理漏洞 |
| CVE-2026-90110 | 9.4 CRITICAL | inetpeer 随机化RB树节点比较 |
| CVE-2026-90230 | 9.1 CRITICAL | Linux内核Nvme-target堆越界读取漏洞 |
| CVE-2026-90414 | 9.1 CRITICAL | IB/isert拒绝声明超出实际接收数据的PDU |
| CVE-2026-90413 | 9.1 CRITICAL | IB/isert 登录PDU数据长度校验漏洞 |
| CVE-2026-90380 | 8.8 HIGH | MT76驱动 mt792x 使用释放后内存漏洞 |
| CVE-2026-93042 | 8.8 HIGH | Linux内核dmaengine模块资源耗尽漏洞 |
| CVE-2026-90425 | 8.8 HIGH | Linux内核 5.x 内核漏洞 |
| CVE-2026-90240 | 8.8 HIGH | Linux内核 IOMMU 别名拆除时刷新缓存错误 |
| CVE-2026-90381 | 8.8 HIGH | Linux内核mt76驱动无线信道切换漏洞 |
| CVE-2026-90329 | 8.8 HIGH | Linux 内核 HID 驱动探测清理同步漏洞 |
| CVE-2026-90357 | 8.8 HIGH | mt76驱动MT7915无线局域网远程拒绝服务漏洞 |
| CVE-2026-90379 | 8.8 HIGH | Linux 内核 mt76 驱动系统崩溃漏洞 |
| CVE-2026-90162 | 8.8 HIGH | Linux ksmbd 锁授予UAF/双重释放竞态漏洞 |
| CVE-2026-93189 | 8.8 HIGH | Linux HID核心使用已释放内存漏洞 |
| CVE-2026-90255 | 8.8 HIGH | Linux内核 Bluetooth 漏洞 |
显示前 20 条，共 600 条。 查看全部 → →
IV. Related Vulnerabilities
V. Comments for CVE-2026-90201
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