CVE-2025-55163— Netty MadeYouReset HTTP/2 DDoS Vulnerability
Quick assessment
Affected
netty netty
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.
Netty是Netty社区的一款非阻塞I/O客户端-服务器框架，它主要用于开发Java网络应用程序，如协议服务器和客户端等。 Netty 4.1.124.Final和4.2.4.Final之前版本存在安全漏洞，该漏洞源于HTTP/2协议逻辑缺陷，可能导致资源耗尽和分布式拒绝服务攻击。
Possible ATT&CK Techniques 1 AI
T1499 · Endpoint Denial of Service
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I. Basic Information for CVE-2025-55163
Vulnerability Information
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Vulnerability Title
Netty MadeYouReset HTTP/2 DDoS Vulnerability
Source: CVE Program / CVE List V5
Vulnerability 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.
Source: CVE Program / CVE List V5
CVSS Information
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
Source: CVE Program / CVE List V5
Vulnerability Type
不加限制或调节的资源分配
Source: CVE Program / CVE List V5
Vulnerability Title
Netty 安全漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Netty是Netty社区的一款非阻塞I/O客户端-服务器框架，它主要用于开发Java网络应用程序，如协议服务器和客户端等。 Netty 4.1.124.Final和4.2.4.Final之前版本存在安全漏洞，该漏洞源于HTTP/2协议逻辑缺陷，可能导致资源耗尽和分布式拒绝服务攻击。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)
Affected Products
II. Public POCs for CVE-2025-55163
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IV. Related Vulnerabilities
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Same vendor: netty
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CVE-2026-100666
Netty 4.2.0 through 4.2.16 Response Desynchronization via Ht -
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Netty 4.2.2 through 4.2.17 HTTP/1 Host Header Authority Conf -
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Same weakness: CWE-770
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V. Comments for CVE-2025-55163
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