CVE-2026-55851

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>4.1.136</lt></range>
      </package>
    </affects>
    <description>
      <body xmlns="http://www.w3.org/1999/xhtml">
	<p>Netty is a network application framework for development of protocol
	servers and clients. In versions 4.2.0.Final up to (but not including)
	4.2.16.Final, and 4.1.0.Final up to (but not including) 4.1.135, the
	`HAProxyMessageDecoder` in Netty's `codec-haproxy` module performs
	protocol version detection by reading the 13th byte as a signed Java
	`byte` and widening it to `int` without masking; a PROXY protocol v2
	binary prefix followed by version byte `0xFF` sign-extends to `-1`,
	collides with the decoder's need-more-data sentinel, and causes
	`ByteToMessageDecoder` to accumulate inbound bytes in an unbounded
	`cumulation` buffer until direct memory is exhausted. This issue is
	fixed in versions 4.1.136.Final and 4.2.16.Final.</p>
      </body>
    </description>
    <references>
      <cvename>CVE-2026-55851</cvename>
      <url>https://nvd.nist.gov/vuln/detail/CVE-2026-55851</url>
    </references>
    <dates>
      <discovery>2026-07-21</discovery>
      <entry>2026-10-25</entry>
    </dates>
  </vuln>