GHSA-558v-64gr-wgg4High

Netty: [Bzip2Decoder] Infinite Loop in RLE State Machine Leads to Event-Loop Thread Hang

Published
July 22, 2026
Last Modified
July 22, 2026

🔗 CVE IDs covered (1)

📋 Description

The Bzip2Decoder handler in Netty's compression codec pipeline is vulnerable to a denial-of-service attack through a malformed bzip2 stream that permanently captures the event-loop thread in an infinite loop. The vulnerability exists in the run-length encoding (RLE) state machine within [Bzip2BlockDecompressor.read()]

🎯 Affected products2

  • maven/io.netty:netty-codec-compression:>= 4.2.0.Final, < 4.2.16.Final
  • maven/io.netty:netty-codec:< 4.1.136.Final

🔗 References (4)