Allocation of Resources Without Limits or Throttling Affecting io.netty:netty-codec-http2 package, versions [,4.1.124.Final)[4.2.0.Alpha1,4.2.4.Final)
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- published14 Aug 2025
- disclosed13 Aug 2025
- creditGal Bar Nahum, Anat Bremler-Barr, Yaniv Harel
Introduced: 13 Aug 2025
NewCVE-2025-55163 (opens in a new tab)How to fix?
Upgrade io.netty:netty-codec-http2 to version 4.1.124.Final, 4.2.4.Final or higher.
Overview
io.netty:netty-codec-http2 is a HTTP2 sub package for the netty library, an event-driven asynchronous network application framework.
Affected versions of this package are vulnerable to Allocation of Resources Without Limits or Throttling through the improper handling of concurrently active streams per connection. An attacker can cause resource exhaustion and disrupt service availability by rapidly sending crafted frames, such as WINDOW_UPDATE, HEADERS, or PRIORITY, that manipulate the server's stream reset logic, leading to unbounded concurrent stream processing.