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Vulnerability record · CVE-2026-31673 · published 25 April 2026

CVE-2026-31673: Linux kernel vulnerability

Linux · Linux Kernel

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.

7.8 CVSS 3.1 High EPSS 0.18% · top 93.6%
7.8CVSS 3.1 base score
0.18%EPSS exploitation probability, 30 days
NoNot in CISA KEV
1Affected product versions listed by NVD
8References
17 Jun 2026Last modified by NVD

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.

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

Affected products

1 vulnerable configurations from NVD's CPE data, grouped by vendor and product.

References

LinkTags
https://git.kernel.org/stable/c/0c739f3785f84af695952c2bac8be2f45082c9b8 Patch
https://git.kernel.org/stable/c/39897df386376912d561d4946499379effa1e7ef Patch
https://git.kernel.org/stable/c/4f6a8f10182c3a9d22e8eb183957ae7ade9e4bf7
https://git.kernel.org/stable/c/900a4e0910e98b8caef117d5df00471fa438dcf9 Patch
https://git.kernel.org/stable/c/b9232421a77a649c9376c99fdfc8cb7f79cad34c Patch
https://git.kernel.org/stable/c/bdf206e740bf2919d818f132c8c9cc7ed91d11c0 Patch
https://git.kernel.org/stable/c/c3ec44ab4526bbc4b6c9fc845af86488244f4c9b
https://git.kernel.org/stable/c/e7339db13b9ddb63417b12da55fd6191e59f7442

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Source: NIST National Vulnerability Database (record CVE-2026-31673), CISA KEV, FIRST EPSS (scores of 2026-09-28). This page is refreshed as NVD updates the record.