CVE-2026-58090
Use-after-free in unix SOCK_STREAM message handling
- State
- Published
- Severity
- 7.8 High
- Published
- Aug 26, 2026
- Updated
- Aug 27, 2026
- Reserved
- Jun 29, 2026
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.
Scores
| CVSS | Score | Vector | Source |
|---|---|---|---|
| 3.1 | 7.8 High | CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H | CISA-ADP |
Weaknesses
- CWE-416 Use After Free
Affected Products
| Product | Versions |
|---|---|
FreeBSDFreeBSD |
|
References
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