High · published June 12, 2026
Netty is a network application framework for development of protocol servers and clients. Prior to versions 4.1.135.Final and 4.2.15.Final, RedisArrayAggregator pre-allocates ArrayList with initial capacity equal to the RESP array element count declared in an array header. That count is taken from the wire before the corresponding child messages exist. A small malicious header can claim a huge initial capacity. 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 |