CVE-2026-57589

Published: Jun 25, 2026Modified: Jun 26, 2026

7.4

Vector

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

Exploitability: 1.4 / Impact: 5.9

Source: MITRE (Secondary)

Description

sys/kern/sysv_sem.c in OpenBSD through 7.9 has a use-after-free allowing local privilege escalation to root. This is a context switch use-after-free after tsleep in sys_semget().

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 Any operations using the original pointer are no longer valid because the memory "belongs" to the code that operates on the new pointer.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 (2)

https://github.com/openbsd/src/commit/1957873d2063db11dab780eca75b5e629d1e838d

Source: cve@mitre.org

https://openai.com/index/patch-the-planet/

Source: cve@mitre.org

Timeline

No history available yet.