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CVE-2025-55163

Netty MadeYouReset HTTP/2 DDoS Vulnerability

Published: Aug 13, 2025Updated: Nov 4, 2025 Sources: CVE List NVD GHSA BDUCWE-770
7.5HIGH
NVD MITRE
EPSS Score
1.0%
Top 39.0%
CISA KEV
Not in KEV
Exploits
No Known Exploits
Remediation
Patch Available
Self-Check
OpenVAS

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.

No summary for this CVE yet.

CVSS Vector Breakdown

AV:NAC:LPR:NUI:NS:UC:NI:NA:H
Exploitability
AV:NAttack Vector
Network
AC:LAttack Complexity
Low
PR:NPrivileges Required
None
UI:NUser Interaction
None
Scope
S:UScope
Unchanged
Impact
C:NConfidentiality
None
I:NIntegrity
None
A:HAvailability
High
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Weaknesses

CWE-770

Affected Products

Maven
package-ecosystem
io.netty:netty-codec-http2
OSS Libraries
io.grpc:grpc-netty-shaded
OSS Libraries
netty
oss-projectaka netty-incubator-codec-ohttp, io.netty:netty
nettyLibraryLibrary
OSS Libraries / generic-library
ООО «Ред Софт»
commercial·RUaka red soft
РЕД ОСOn-premOS
Operating Systems / linux-distro
Apache Software Foundation
oss-project·USaka apache foundation
nettyOn-premLibrary
OSS Libraries / generic-library
Google Inc
commercial·USaka google
Android StudioOn-premDesktop App
Mobile Apps

Exploitability

Official Patch Available
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Attack Graph

Products CVE Techniques Tactics

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MITRE ATT&CK

1 technique
Impact
View detailed technique mapping

References

https://github.com/netty/netty/security/advisories/GHSA-prj3-ccx8-p6x4
github.com
http://www.openwall.com/lists/oss-security/2025/08/16/1
openwall.com
https://www.kb.cert.org/vuls/id/767506
kb.cert.org
and 6 more references View all →

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