CVE-2026-57589
HIGH
NVD
CVSS Score
7.4
Severity
HIGH
Published
Jun 25, 2026
Vendor
unknown
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().