CVE-2026-57589

—

CVSS 3.1

7.8 high

EPSS

<1%p7

Published

Jun 25, 2026 (Jun 25, 2026)

Modified

Jul 10, 2026

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().

Vendors: openbsd
Products: openbsd
Weakness: CWE-416
Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

NVD CVE.org GitHub PoCs EPSS (0.2%)

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