CVE-2025-55163 — Netty MadeYouReset HTTP/2 DDoS Vulnerability

Description (CNA)

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.

Affected (CNA)

Vendor / product	Versions
netty / netty	affected < 4.1.124.Final; affected < 4.2.4.Final

CWE

CWE-770

References

https://github.com/netty/netty/security/advisories/GHSA-prj3-ccx8-p6x4

ADP enrichment

CISA-ADP

No English description supplied.

No references supplied.

CVE

No English description supplied.

https://www.kb.cert.org/vuls/id/767506
http://www.openwall.com/lists/oss-security/2025/08/16/1