CVE-2026-31673

HIGH

af_unix: read UNIX_DIAG_VFS data under unix_state_lock

Title source: cna
STIX 2.1

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.

Scores

CVSS v3 7.8
EPSS 0.0001
EPSS Percentile 2.5%
Attack Vector LOCAL
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

Details

Status published
Products (14)
Linux/Linux < 3.3
Linux/Linux 3.3
Linux/Linux 5f7b0569460b7d8d01ca776430a00505a68b7584 - 0c739f3785f84af695952c2bac8be2f45082c9b8
Linux/Linux 5f7b0569460b7d8d01ca776430a00505a68b7584 - 39897df386376912d561d4946499379effa1e7ef
Linux/Linux 5f7b0569460b7d8d01ca776430a00505a68b7584 - 900a4e0910e98b8caef117d5df00471fa438dcf9
Linux/Linux 5f7b0569460b7d8d01ca776430a00505a68b7584 - b9232421a77a649c9376c99fdfc8cb7f79cad34c
Linux/Linux 5f7b0569460b7d8d01ca776430a00505a68b7584 - bdf206e740bf2919d818f132c8c9cc7ed91d11c0
Linux/Linux 6.12.83 - 6.12.*
Linux/Linux 6.18.24 - 6.18.*
Linux/Linux 6.19.14 - 6.19.*
... and 4 more
Published Apr 25, 2026
Tracked Since Apr 25, 2026