High · published June 12, 2026
Netty is a network application framework for development of protocol servers and clients. In netty-codec-redis prior to versions 4.1.135.Final and 4.2.15.Final, an attacker can cause DoS by sending crafted Redis payloads across multiple connections without `\r\n`. This exhausts the server's direct memory pool (OutOfDirectMemoryError), preventing legitimate connections from being processed. Versions 4.1.135.Final and 4.2.15.Final patch the issue.
| Product | Versions | Fixed in |
|---|---|---|
| netty/netty | < 4.1.135 | 4.1.135 |
| netty/netty | ≥ 4.2.0, < 4.2.15 | 4.2.15 |