CVE-2026-90138— Linux vsock 监听器错误检查缺失漏洞
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，已修复以下漏洞： vsock：在 中不要检查监听套接字的 Syzbot 报告了一个可通过以下步骤复现的问题： 其基本原理是：创建了一个套接字（r0）并在绑定后触发自连接。由于该自连接回环到 r0，而 r0 当时仍处于 状态，导致其被错误地派发到客户端连接处理路径。在该路径中遇到的意外数据包类型将 设置为 。 随后，在同一个套接字上调用了 。由于内核的监听处理路径从不检查或清除 ，因此 调用成功。接着，创建了一个新的套接字（r1）作为普通客户端，并连接到 r0。然而， 拒绝了这个传入连接，因为
可能的 ATT&CK 技术 1 AI
T1505 · Server Software Component影响版本矩阵 10
| 厂商 | 产品 | 版本范围 | 状态 |
|---|---|---|---|
| Linux | Linux | d021c344051af91f42c5ba9fdedc176740cbd238< c5a75d37c21e558cc6fad1597e732ead30745eed |
affected |
d021c344051af91f42c5ba9fdedc176740cbd238< 36e5fa009f98a4edbe1783ac11c0df672b224742 |
affected | ||
d021c344051af91f42c5ba9fdedc176740cbd238< 491b368a0c6e5f28b615a50b0d384f5c25fde2a7 |
affected | ||
d021c344051af91f42c5ba9fdedc176740cbd238< b8c899cf5e7be29840a172c183dedd8d3e7a0287 |
affected | ||
3.9 |
affected | ||
< 3.9 |
unaffected | ||
6.12.110≤ 6.12.* |
unaffected | ||
6.18.52≤ 6.18.* |
unaffected | ||
| … +2 条更多 | |||
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一、 漏洞 CVE-2026-90138 基础信息
漏洞信息
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Vulnerability Title
vsock: don't check the listener's sk_err in vsock_accept()
来源: CVE Program / CVE List V5
Vulnerability Description
In the Linux kernel, the following vulnerability has been resolved:
vsock: don't check the listener's sk_err in vsock_accept()
Syzbot reported an issue which can be reproduced with these steps:
r0 = socket(AF_VSOCK, SOCK_STREAM, 0)
bind(r0, {VMADDR_CID_ANY, PORT})
connect(r0, {VMADDR_CID_LOCAL, PORT}) -> -1, EPROTO (self-connect)
listen(r0, backlog) -> 0
r1 = socket(AF_VSOCK, SOCK_STREAM, 0)
connect(r1, {VMADDR_CID_LOCAL, PORT}) -> 0
accept(r0) -> -1, EPROTO (stale sk_err)
Basically, it creates a socket (r0) and triggers a self-connect after
binding it. This self-connect fails with EPROTO because it loops back
to r0 while the socket is still in the TCP_SYN_SENT state, causing it
to be incorrectly dispatched to the connecting-client path. The
unexpected packet type encountered there sets sk_err to EPROTO.
After that, it invokes a listen() call on the same socket. This
listen() call succeeds because the kernel's listening path never
inspects or clears sk_err. Then, a new socket (r1) is created as a
normal client and connects to r0. However, vsock_accept() rejects this
incoming connection because the listener's sk_err still holds the
EPROTO error from the earlier failed self-connect.
This rejection causes the child socket created for r1's connection to
never be freed on virtio or hyperv transports; only the VMCI transport
implements pending_work to revisit and clean up a rejected socket.
For a non-blocking connect(), vsock_connect() may return -EINPROGRESS
immediately, and vsock_connect_timeout() can later set sk->sk_err
asynchronously.
Since no vsock transport ever sets sk_err on a socket while it is in
TCP_LISTEN state, checking it in vsock_accept() serves no purpose and
only carries forward errors left behind by earlier, unrelated
connection attempts on the same socket. Remove the checks so accept()
no longer rejects valid incoming connections because of a stale
error, which also avoids the resource leak described above.
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-2026-90138 的公开POC
| # | POC 描述 | 源链接 | 神龙链接 |
|---|
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CVE-2026-90138 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-2026-92489 | 9.8 CRITICAL | Linux内核 xfrm 双重释放漏洞 |
| CVE-2026-90173 | 9.8 CRITICAL | SMB SmbDirect 释放完成队列漏洞 |
| 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-2026-93189 | 8.8 HIGH | Linux HID核心使用已释放内存漏洞 |
| CVE-2026-90256 | 8.8 HIGH | Linux Bluetooth L2CAP 远程代码执行漏洞 |
| CVE-2026-93042 | 8.8 HIGH | Linux内核dmaengine模块资源耗尽漏洞 |
| CVE-2026-90286 | 8.8 HIGH | AMDGPU GFX6 计算队列PFP使用漏洞 |
| CVE-2026-90255 | 8.8 HIGH | Linux内核 Bluetooth 漏洞 |
| CVE-2026-90425 | 8.8 HIGH | Linux内核 5.x 内核漏洞 |
| CVE-2026-90329 | 8.8 HIGH | Linux 内核 HID 驱动探测清理同步漏洞 |
| CVE-2026-90162 | 8.8 HIGH | Linux ksmbd 锁授予UAF/双重释放竞态漏洞 |
| CVE-2026-90240 | 8.8 HIGH | Linux内核 IOMMU 别名拆除时刷新缓存错误 |
| CVE-2026-90367 | 8.8 HIGH | Linux内核MT7996驱动死锁漏洞 |
| CVE-2026-90371 | 8.8 HIGH | mt76 无线驱动 RXDMAD_C 竞态修复 |
显示前 20 条，共 600 条。 查看全部 → →
IV. Related Vulnerabilities
V. Comments for CVE-2026-90138
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