---
cve: "CVE-2026-57589"
severity: "HIGH"
cvss: 7.4
epss: "12%"
vendor: "OpenBSD"
kev: false
exploited: false
published: "2026-06-25 01:16:26"
tags: [cve, security, high]
source: tsecurity.de CVE-Dossier
exported: "2026-09-06T11:45:12+02:00"
---

# CVE-2026-57589

> 7.4 HIGH · 🧪 PoC

## Beschreibung

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().

## CVSS-Vektor

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

| Metrik | Wert | Bewertung |
|---|---|---|
| AV Angriffsvektor | Lokal | good |
| AC Komplexität | Hoch | good |
| PR Privilegien | Keine | bad |
| UI Interaktion | Keine | bad |
| S Scope | Unverändert | good |
| C Vertraulichkeit | Hoch | bad |
| I Integrität | Hoch | bad |
| A Verfügbarkeit | Hoch | bad |

## Patch verfügbar (OSV)

- 1957873d2063db11dab780eca75b5e629d1e838d (Commit)

## Referenzen

- <https://github.com/openbsd/src/commit/1957873d2063db11dab780eca75b5e629d1e838d>
- <https://openai.com/index/patch-the-planet/>

---
_Exportiert aus dem [tsecurity.de CVE-Dossier](https://tsecurity.de/cve?cve=CVE-2026-57589) · Datenquellen: EUVD (ENISA), NVD, OSV, CISA KEV, FIRST EPSS, Exploit-DB, BSI BITS_