---
cve: "CVE-2026-25139"
severity: "HIGH"
cvss: 8.7
epss: "48%"
vendor: "RIOT-OS"
kev: false
exploited: false
published: "2026-02-04 18:16:09"
tags: [cve, security, high]
source: tsecurity.de CVE-Dossier
exported: "2026-09-11T08:15:30+02:00"
---

# CVE-2026-25139

> 8.7 HIGH · 🧪 PoC

## Beschreibung

RIOT is an open-source microcontroller operating system, designed to match the requirements of Internet of Things (IoT) devices and other embedded devices. In version 2025.10 and prior, multiple out-of-bounds read allow any unauthenticated user, with ability to send or manipulate input packets, to read adjacent memory locations, or crash a vulnerable device running the 6LoWPAN stack. The received packet is cast into a sixlowpan_sfr_rfrag_t struct and dereferenced without validating the packet is large enough to contain the struct object. At time of publication, no known patch exists.

## CVSS-Vektor

```
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N
```

| Metrik | Wert | Bewertung |
|---|---|---|
| AV Angriffsvektor | Netzwerk | bad |
| AC Komplexität | Gering | bad |
| PR Privilegien | Keine | bad |
| UI Interaktion | Keine | bad |

## Referenzen

- <https://github.com/RIOT-OS/RIOT/security/advisories/GHSA-c8fh-23qr-97mc>

---
_Exportiert aus dem [tsecurity.de CVE-Dossier](https://tsecurity.de/cve?cve=CVE-2026-25139) · Datenquellen: EUVD (ENISA), NVD, OSV, CISA KEV, FIRST EPSS, Exploit-DB, BSI BITS_