CVE-2025-55163 Security Details

CVE ID

CVE-2025-55163

CWE

CWE-770

CVE Description

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.

Published

Aug 14, 2025

CVSS Score & Severity

7.5High

CVSS Vector

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

EPSS Score

0.052%

Malware

malware

KEV Status

Not in KEV Catalog: No known exploits

Vulnerable Methods

io/netty/handler/codec/http2/AbstractHttp2ConnectionHandlerBuilder.buildFromCodec(Lio/netty/handler/codec/http2/Http2ConnectionDecoder;Lio/netty/handler/codec/http2/Http2ConnectionEncoder;)Lio/netty/handler/codec/http2/Http2ConnectionHandler;

JVM

io/netty/handler/codec/http2/AbstractHttp2ConnectionHandlerBuilder.buildFromConnection(Lio/netty/handler/codec/http2/Http2Connection;)Lio/netty/handler/codec/http2/Http2ConnectionHandler;

JVM

io/netty/handler/codec/http2/AbstractHttp2ConnectionHandlerBuilder.decoderEnforceMaxRstFramesPerWindow(II)Lio/netty/handler/codec/http2/AbstractHttp2ConnectionHandlerBuilder;

JVM

io/netty/handler/codec/http2/Http2ConnectionHandler$BuilderBase.build(Lio/netty/handler/codec/http2/Http2ConnectionDecoder;Lio/netty/handler/codec/http2/Http2ConnectionEncoder;)Lio/netty/handler/codec/http2/Http2ConnectionHandler;

JVM

io/netty/handler/codec/http2/Http2ConnectionHandler.<init>(Lio/netty/handler/codec/http2/Http2ConnectionDecoder$Builder;Lio/netty/handler/codec/http2/Http2ConnectionEncoder$Builder;)V

JVM

Affected Ecosystems

affected

Source

National Vulnerability Database

References

https://github.com/advisories/GHSA-prj3-ccx8-p6x4THIRD_PARTY