CVE-2026-31673

HighCVSS 7.8/10Last modified Nov 11, 2026

Description

In the Linux kernel, the following vulnerability has been resolved:

af_unix: read UNIX_DIAG_VFS data under unix_state_lock

Exact UNIX diag lookups hold a reference to the socket, but not to u->path. Meanwhile, unix_release_sock() clears u->path under unix_state_lock() and drops the path reference after unlocking.

Read the inode and device numbers for UNIX_DIAG_VFS while holding unix_state_lock(), then emit the netlink attribute after dropping the lock.

This keeps the VFS data stable while the reply is being built.

Metrics

CVSS 3.1 7.8/10CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

Weakness enumeration

CWE-362

Affected software

VendorProductVersions
LinuxLinux>= 5f7b0569460b7d8d01ca776430a00505a68b7584, < e7339db13b9ddb63417b12da55fd6191e59f7442; >= 5f7b0569460b7d8d01ca776430a00505a68b7584, < 4f6a8f10182c3a9d22e8eb183957ae7ade9e4bf7; >= 5f7b0569460b7d8d01ca776430a00505a68b7584, < c3ec44ab4526bbc4b6c9fc845af86488244f4c9b; >= 5f7b0569460b7d8d01ca776430a00505a68b7584, < b9232421a77a649c9376c99fdfc8cb7f79cad34c; >= 5f7b0569460b7d8d01ca776430a00505a68b7584, < 0c739f3785f84af695952c2bac8be2f45082c9b8; >= 5f7b0569460b7d8d01ca776430a00505a68b7584, < 900a4e0910e98b8caef117d5df00471fa438dcf9; >= 5f7b0569460b7d8d01ca776430a00505a68b7584, < bdf206e740bf2919d818f132c8c9cc7ed91d11c0; >= 5f7b0569460b7d8d01ca776430a00505a68b7584, < 39897df386376912d561d4946499379effa1e7ef
LinuxLinux3.3
SiemensSIMATIC S7-1500 TM MFP - GNU/Linux subsystem< *

References

Timeline

Published
Apr 25, 2026
Last modified
Nov 11, 2026
NVD status
Modified

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CVE-2026-31673: High severity, CVSS 7.8 | Vulnix