CVE-2026-58090

Published: Aug 26, 2026Modified: Sep 24, 2026

7.8

Vector

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

Exploitability: 1.8 / Impact: 5.9

Source: 134c704f-9b21-4f2e-91b3-4a467353bcc0 (Secondary)

Description

The SOCK_STREAM receive path in the unix socket implementation failed to fully detach control messages from the socket buffer before processing them. Some error paths would free those messages, leaving freed data mbufs in the receive socket buffer. An unprivileged local user can exploit this use-after-free to escalate privileges.

Affected (14)

Products: Freebsd: Freebsd

Freebsd

1 product

Freebsd

Configuration A

14 vulnerable

Vulnerable Software	Affected Versions
Freebsd Freebsd	Version 15.0 p10
Freebsd Freebsd	Version 15.0 p11
Freebsd Freebsd	Version 15.0 p12
Freebsd Freebsd	Version 15.0 p1
Freebsd Freebsd	Version 15.0 p2
Freebsd Freebsd	Version 15.0 p3
Freebsd Freebsd	Version 15.0 p4
Freebsd Freebsd	Version 15.0 p5
Freebsd Freebsd	Version 15.0 p6
Freebsd Freebsd	Version 15.0 p7
Freebsd Freebsd	Version 15.0 p8
Freebsd Freebsd	Version 15.0 p9
Freebsd Freebsd	Version 15.1 p1
Freebsd Freebsd	Version 15.1 p2

Related CWEs

CWE-416

Use After Free

The product reuses or references memory after it has been freed. At some point afterward, the memory may be allocated again and saved in another pointer, while the original pointer references a location somewhere within the new allocation. Any operations using the original pointer are no longer valid because the memory "belongs" to the code that operates on the new pointer.

References (1)

https://security.freebsd.org/advisories/FreeBSD-SA-26:57.unix.asc

Source: secteam@freebsd.org

Vendor Advisory

Timeline

No history available yet.