High severity · published Apr 25, 2026
CVE-2026-31673
af_unix: read UNIX_DIAG_VFS data under unix_state_lock
7.8
CVSS
0.1%
EPSS
No
On KEV
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 vector
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Attack vector
Local
Complexity
Low
Privileges
Low
User interaction
None
Confidentiality
High
Integrity
High
Availability
High
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)0.1% · higher than 3% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
KE
Kernel · Linux
3.3 before 6.6.136; 6.7 before 6.12.83; 6.13 before 6.18.24; 6.19 before 6.19.14; 7.0; 7.0; +5 more · source: NVD
LI
Linux · Linux
5f7b0569460b7d8d01ca776430a00505a68b7584 before e7339db13b9ddb63417b12da55fd6191e59f7442; 5f7b0569460b7d8d01ca776430a00505a68b7584 before 4f6a8f10182c3a9d22e8eb183957ae7ade9e4bf7; 5f7b0569460b7d8d01ca776430a00505a68b7584 before c3ec44ab4526bbc4b6c9fc845af86488244f4c9b; 5f7b0569460b7d8d01ca776430a00505a68b7584 before b9232421a77a649c9376c99fdfc8cb7f79cad34c; 5f7b0569460b7d8d01ca776430a00505a68b7584 before 0c739f3785f84af695952c2bac8be2f45082c9b8; 5f7b0569460b7d8d01ca776430a00505a68b7584 before 900a4e0910e98b8caef117d5df00471fa438dcf9; +3 more · source: vendor
SS
SIMATIC S7-1500 TM MFP - GNU/Linux subsystem · Siemens
0 · source: CISA
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2026-31673
CVE.org
https://www.cve.org/CVERecord?id=CVE-2026-31673
Patch
https://git.kernel.org/stable/c/0c739f3785f84af695952c2bac8be2f45082c9b8
Patch
https://git.kernel.org/stable/c/39897df386376912d561d4946499379effa1e7ef
git.kernel.org
https://git.kernel.org/stable/c/4f6a8f10182c3a9d22e8eb183957ae7ade9e4bf7
Patch
https://git.kernel.org/stable/c/900a4e0910e98b8caef117d5df00471fa438dcf9
Patch
https://git.kernel.org/stable/c/b9232421a77a649c9376c99fdfc8cb7f79cad34c
Patch
https://git.kernel.org/stable/c/bdf206e740bf2919d818f132c8c9cc7ed91d11c0
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