# CVE-2022-41915: libnetty-java: Netty project is an event-driven asynchronous network applicationframework

CVE-2022-41915 is fixed in 2 products on 1 platform, first by libnetty-java 1:4.1.7-4ubuntu0.1+esm2, released December 12, 2022. It is not reported as exploited. Patch Radar priority: Routine.

- Web page: https://patchblox.com/security/cve/CVE-2022-41915
- Priority: Routine
- CVSS: 6.5 (Medium)
- EPSS: 0.0095
- 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. Starting in version 4.1.83.Final and prior to 4.1.86.Final, whencalling `DefaultHttpHeadesr.set` with an _iterator_ of values, header valuevalidation was not performed, allowing malicious header values in theiterator to perform HTTP Response Splitting. This issue has been patched inversion 4.1.86.Final. Integrators can work around the issue by changing the`DefaultHttpHeaders.set(CharSequence, Iterator<?>)` call, into a `remove()`call, and call `add()` in a loop over the iterator of values.

## 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-2022-41915](https://patchblox.com/security/data/fix/linux/debian-cve-2022-41915.md) | Dec 13, 2022 |
| Linux | netty Debian 13.5 (trixie) | 1:4.1.48-6 | [DEBIAN-CVE-2022-41915](https://patchblox.com/security/data/fix/linux/debian-cve-2022-41915.md) | Dec 13, 2022 |
| Linux | netty Debian 14 | 1:4.1.48-6 | [DEBIAN-CVE-2022-41915](https://patchblox.com/security/data/fix/linux/debian-cve-2022-41915.md) | Dec 13, 2022 |

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Data as of 2026-11-08T19:12:23Z 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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