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OpenAdvisories
High · 7.4 CVE-2026-57589 EUVD-2026-39156GHSA-w3gf-4959-2377

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-a…

Published Jun 25, 2026 · Updated Jun 26, 2026 · Assigned by mitre

Vendor: OpenBSD Product: OpenBSD

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().

Affected products

VendorProductAffectedFixed
OpenBSD OpenBSD ≤ 7.9 —

Advisories 1

References