---
cve: "CVE-2025-55163"
severity: "HIGH"
cvss: 8.2
epss: "1.1%"
vendor: "netty"
kev: false
exploited: false
published: "2025-08-13 15:15:39"
tags: [cve, security, high]
source: tsecurity.de CVE-Dossier
exported: "2026-09-05T22:49:48+02:00"
---

# CVE-2025-55163

> 8.2 HIGH · 🧪 PoC

## Beschreibung

Netty is an asynchronous, event-driven network application framework. Prior to versions 4.1.124.Final and 4.2.4.Final, Netty is vulnerable to MadeYouReset DDoS. This is a logical vulnerability in the HTTP/2 protocol, that uses malformed HTTP/2 control frames in order to break the max concurrent streams limit - which results in resource exhaustion and distributed denial of service. This issue has been patched in versions 4.1.124.Final and 4.2.4.Final.

## CVSS-Vektor

```
CVSS:4.0/AV:N/AC:L/AT:P/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 |

## Patch verfügbar (OSV)

- 0a742315b9c9c392a28eabdcb95c2740e1729c8e (Commit)
- 7fefa5a9d6f2bf41b6b304cfe26b2e193d8f326a (Commit)

## Referenzen

- <https://github.com/netty/netty/security/advisories/GHSA-prj3-ccx8-p6x4>
- <http://www.openwall.com/lists/oss-security/2025/08/16/1>
- <https://www.kb.cert.org/vuls/id/767506>

---
_Exportiert aus dem [tsecurity.de CVE-Dossier](https://tsecurity.de/cve?cve=CVE-2025-55163) · Datenquellen: EUVD (ENISA), NVD, OSV, CISA KEV, FIRST EPSS, Exploit-DB, BSI BITS_