libnetty-java: Netty is an asynchronous, event-driven network application framework
CVE-2026-42586 is fixed in 5 products on 1 platform, first by libnetty-buffer-java 1:4.1.48-16ubuntu0.1~esm2, released May 13, 2026. It is not reported as exploited. Patch Radar priority: Routine.
Netty is an asynchronous, event-driven network application framework. Prior to 4.2.13.Final and 4.1.133.Final, the Netty Redis codec encoder (RedisEncoder) writes user-controlled string content directly to the network output buffer without validating or sanitizing CRLF (\r\n) characters. Since the Redis Serialization Protocol (RESP) uses CRLF as the command/response delimiter, an attacker who can control the content of a Redis message can inject arbitrary Redis commands or forge fake responses. This vulnerability is fixed in 4.2.13.Final and 4.1.133.Final.
Where it's fixed
| Product | Fixed in | Fix | Released |
|---|---|---|---|
| Linux | |||
| libnetty-buffer-java · Ubuntu 26.04.1 LTS (resolute) | 1:4.1.48-16ubuntu0.1~esm2 | libnetty-buffer-java 1:4.1.48-16ubuntu0.1~esm2 | May 13, 2026 |
| libnetty-common-java · Ubuntu 26.04.1 LTS (resolute) | 1:4.1.48-16ubuntu0.1~esm2 | libnetty-common-java 1:4.1.48-16ubuntu0.1~esm2 | May 13, 2026 |
| libnetty-java · Ubuntu 18.04.6 LTS (bionic) | 1:4.1.7-4ubuntu0.1+esm6 | libnetty-java 1:4.1.7-4ubuntu0.1+esm6 | May 13, 2026 |
| libnetty-java · Ubuntu 20.04 LTS (focal) | 1:4.1.45-1ubuntu0.1~esm6 | libnetty-java 1:4.1.45-1ubuntu0.1~esm6 | May 13, 2026 |
| libnetty-java · Ubuntu 22.04.1 LTS (jammy) | 1:4.1.48-4+deb11u2ubuntu0.1+esm3 | libnetty-java 1:4.1.48-4+deb11u2ubuntu0.1+esm3 | May 13, 2026 |
| libnetty-java · Ubuntu 24.04.5 LTS (noble) | 1:4.1.48-9ubuntu0.1+esm3 | libnetty-java 1:4.1.48-9ubuntu0.1+esm3 | May 13, 2026 |
| libnetty-java · Ubuntu 26.04.1 LTS (resolute) | 1:4.1.48-16ubuntu0.1~esm2 | libnetty-java 1:4.1.48-16ubuntu0.1~esm2 | May 13, 2026 |
| netty · sles 15.7 | 4.1.133-150200.4.46.1 | SUSE-SU-2026:2308-1 | Jun 9, 2026 |
| netty-tcnative · sles 15.6 | 2.0.77-150200.3.39.1 | SUSE-SU-2026:2308-1 | Jun 9, 2026 |
| netty-tcnative · sles 15.7 | 2.0.77-150200.3.39.1 | SUSE-SU-2026:2308-1 | Jun 9, 2026 |
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