# CVE-2022-41881: libnetty-java: Netty project is an event-driven asynchronous network applicationframework

CVE-2022-41881 is fixed in 2 products on 1 platform, first by DEBIAN-CVE-2022-41881, released December 12, 2022. It is not reported as exploited. Patch Radar priority: High.

- Web page: https://patchblox.com/security/cve/CVE-2022-41881
- Priority: High
- CVSS: 7.5 (Medium)
- EPSS: 0.0158
- CISA KEV: not listed
- Exploited (vendor report): no
- Publicly disclosed: no
- Published: Dec 12, 2022

## Description

Netty project is an event-driven asynchronous network applicationframework. In versions prior to 4.1.86.Final, a StackOverflowError can beraised when parsing a malformed crafted message due to an infiniterecursion. This issue is patched in version 4.1.86.Final. There is noworkaround, except using a custom HaProxyMessageDecoder.

## Where it's fixed

| Platform | Product | Fixed in | Fix | Released |
|---|---|---|---|---|
| Linux | libnetty-java Ubuntu 18.04.6 LTS (bionic) | 1:4.1.7-4ubuntu0.1+esm2 | [libnetty-java 1:4.1.7-4ubuntu0.1+esm2](https://patchblox.com/security/data/fix/linux/ubuntu-bionic-libnetty-java-1-4.1.7-4ubuntu0.1-esm2.md) | Dec 12, 2022 |
| Linux | libnetty-java Ubuntu 20.04 LTS (focal) | 1:4.1.45-1ubuntu0.1~esm1 | [libnetty-java 1:4.1.45-1ubuntu0.1~esm1](https://patchblox.com/security/data/fix/linux/ubuntu-focal-libnetty-java-1-4.1.45-1ubuntu0.1-esm1.md) | Dec 12, 2022 |
| Linux | libnetty-java Ubuntu 22.04.1 LTS (jammy) | 1:4.1.48-4+deb11u1build0.22.04.1 | [libnetty-java 1:4.1.48-4+deb11u1build0.22.04.1](https://patchblox.com/security/data/fix/linux/ubuntu-jammy-libnetty-java-1-4.1.48-4-deb11u1build0.22.04.1.md) | Dec 12, 2022 |
| Linux | libnetty-java Ubuntu 24.10 (oracular) | 4.1.48-6 | [libnetty-java 4.1.48-6](https://patchblox.com/security/data/fix/linux/ubuntu-oracular-libnetty-java-4.1.48-6.md) | Jan 16, 2026 |
| Linux | libnetty-java Ubuntu 25.04 (plucky) | 4.1.48-6 | [libnetty-java 4.1.48-6](https://patchblox.com/security/data/fix/linux/ubuntu-plucky-libnetty-java-4.1.48-6.md) | Jan 16, 2026 |
| Linux | netty Debian 12.15 (bookworm) | 1:4.1.48-6 | [DEBIAN-CVE-2022-41881](https://patchblox.com/security/data/fix/linux/debian-cve-2022-41881.md) | Dec 12, 2022 |
| Linux | netty Debian 13.5 (trixie) | 1:4.1.48-6 | [DEBIAN-CVE-2022-41881](https://patchblox.com/security/data/fix/linux/debian-cve-2022-41881.md) | Dec 12, 2022 |
| Linux | netty Debian 14 | 1:4.1.48-6 | [DEBIAN-CVE-2022-41881](https://patchblox.com/security/data/fix/linux/debian-cve-2022-41881.md) | Dec 12, 2022 |

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Data as of 2026-11-08T13:06:02Z UTC. Source: Patchblox Patch Radar (https://patchblox.com/security/patch-radar). Patchblox finds out-of-date software on Windows, macOS and Linux and updates it through release rings: https://patchblox.com/demo

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