What is GHSA-w3gf-4959-2377?

GHSA-w3gf-4959-2377 is a security advisory published by GitHub Security Advisories with High severity. sys/kern/sysv_sem.c in OpenBSD through 7.9 has a use-after-free allowing local privilege...

Which CVE IDs does GHSA-w3gf-4959-2377 cover?

GHSA-w3gf-4959-2377 covers the following CVE IDs: CVE-2026-57589. Each CVE has its own detail page on EchelonGraph Pulse with the synthesized EG score.

What is the CVSS v3 score of GHSA-w3gf-4959-2377?

GHSA-w3gf-4959-2377 has a CVSS v3 base score of 7.4, published by GitHub Security Advisories.

GHSA-w3gf-4959-2377HighCVSS 7.4

sys/kern/sysv_sem.c in OpenBSD through 7.9 has a use-after-free allowing local privilege...

Vendor

GitHub Security Advisories

Published

June 25, 2026

Last Modified

June 25, 2026

🔗 CVE IDs covered (1)

CVE-2026-57589 →

📋 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().

🔗 References (4)

https://nvd.nist.gov/vuln/detail/CVE-2026-57589
https://github.com/openbsd/src/commit/1957873d2063db11dab780eca75b5e629d1e838d
https://openai.com/index/patch-the-planet
https://github.com/advisories/GHSA-w3gf-4959-2377