---
cve: "CVE-2026-41285"
severity: "MEDIUM"
cvss: 4.3
epss: "21%"
vendor: "OpenBSD"
kev: false
exploited: false
published: "2026-04-21 00:16:29"
tags: [cve, security, medium]
source: tsecurity.de CVE-Dossier
exported: "2026-09-04T01:17:07+02:00"
---

# CVE-2026-41285

> 4.3 MEDIUM · 🧪 PoC

## Beschreibung

In OpenBSD through 7.8, the slaacd and rad daemons have an infinite loop when they receive a crafted ICMPv6 Neighbor Discovery (ND) option (over a local network) with length zero, because of an "nd_opt_len * 8 - 2" expression with no preceding check for whether nd_opt_len is zero.

## CVSS-Vektor

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

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

## Referenzen

- <https://www.rfc-editor.org/rfc/rfc4861#section-4.6>
- <https://github.com/openbsd/src/commit/086c5738bcd3c203bcc08d024fcf983cb409115f>
- <https://www.openbsd.org/errata78.html>

---
_Exportiert aus dem [tsecurity.de CVE-Dossier](https://tsecurity.de/cve?cve=CVE-2026-41285) · Datenquellen: EUVD (ENISA), NVD, OSV, CISA KEV, FIRST EPSS, Exploit-DB, BSI BITS_