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CVE details

CVE-2025-55163

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.

Score
8.2 high
Published
2025-08-13
Links
NVD · cve.org

Affected ports (1)

PortPackageVersionStatusMaintainer
java/nettynetty4.1.53_2unaddressedglewis@FreeBSD.org

Template for a VuXML entry

Range taken from the CVE record, check it before committing. make newentry in security/vuxml creates the vid.

  <vuln vid="FIXME (make newentry)">
    <topic>FIXME -- FIXME</topic>
    <affects>
      <package>
	<name>netty</name>
	<range><lt>4.1.124</lt></range>
      </package>
    </affects>
    <description>
      <body xmlns="http://www.w3.org/1999/xhtml">
	<p>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.</p>
      </body>
    </description>
    <references>
      <cvename>CVE-2025-55163</cvename>
      <url>https://nvd.nist.gov/vuln/detail/CVE-2025-55163</url>
    </references>
    <dates>
      <discovery>2025-08-13</discovery>
      <entry>2026-10-25</entry>
    </dates>
  </vuln>