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.
Published: 2026-08-26
Score: n/a
EPSS: n/a
KEV: No
Impact: n/a
Action: n/a
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Remediation

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History

Wed, 26 Aug 2026 05:45:00 +0000

Type Values Removed Values Added
First Time appeared Freebsd
Freebsd freebsd
Vendors & Products Freebsd
Freebsd freebsd

Wed, 26 Aug 2026 04:45:00 +0000

Type Values Removed Values Added
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.
Title Use-after-free in unix SOCK_STREAM message handling
Weaknesses CWE-416
References

Subscriptions

Freebsd Freebsd
cve-icon MITRE

Status: PUBLISHED

Assigner: freebsd

Published:

Updated: 2026-08-26T04:35:10.739Z

Reserved: 2026-06-29T01:40:17.498Z

Link: CVE-2026-58090

cve-icon Vulnrichment

No data.

cve-icon NVD

No data.

cve-icon Redhat

No data.

cve-icon OpenCVE Enrichment

Updated: 2026-08-26T06:00:12Z

Weaknesses