# CVE-2022-24823: libnetty-java: Netty is an open-source, asynchronous event-driven network applicationframework

CVE-2022-24823 is fixed in libnetty-java on 1 platform, first by libnetty-java 1:4.1.48-9ubuntu0.1~esm1, released May 6, 2022. It is not reported as exploited. Patch Radar priority: Routine.

- Web page: https://patchblox.com/security/cve/CVE-2022-24823
- Priority: Routine
- CVSS: n/a (Low)
- EPSS: 0.0104
- CISA KEV: not listed
- Exploited (vendor report): no
- Publicly disclosed: no
- Published: May 6, 2022

## Description

Netty is an open-source, asynchronous event-driven network applicationframework. The package `io.netty:netty-codec-http` prior to version4.1.77.Final contains an insufficient fix for CVE-2021-21290. When Netty'smultipart decoders are used local information disclosure can occur via thelocal system temporary directory if temporary storing uploads on the diskis enabled. This only impacts applications running on Java version 6 andlower. Additionally, this vulnerability impacts code running on Unix-likesystems, and very old versions of Mac OSX and Windows as they all share thesystem temporary directory between all users. Version 4.1.77.Final containsa patch for this vulnerability. As a workaround, specify one's own`java.io.tmpdir` when starting the JVM or useDefaultHttpDataFactory.setBaseDir(...) to set the directory to somethingthat is only readable by the current user.

## 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+esm3 | [libnetty-java 1:4.1.7-4ubuntu0.1+esm3](https://patchblox.com/security/data/fix/linux/ubuntu-bionic-libnetty-java-1-4.1.7-4ubuntu0.1-esm3.md) | Mar 25, 2024 |
| Linux | libnetty-java Ubuntu 20.04 LTS (focal) | 1:4.1.45-1ubuntu0.1~esm2 | [libnetty-java 1:4.1.45-1ubuntu0.1~esm2](https://patchblox.com/security/data/fix/linux/ubuntu-focal-libnetty-java-1-4.1.45-1ubuntu0.1-esm2.md) | Mar 25, 2024 |
| Linux | libnetty-java Ubuntu 22.04.1 LTS (jammy) | 1:4.1.48-4+deb11u2ubuntu0.1~esm1 | [libnetty-java 1:4.1.48-4+deb11u2ubuntu0.1~esm1](https://patchblox.com/security/data/fix/linux/ubuntu-jammy-libnetty-java-1-4.1.48-4-deb11u2ubuntu0.1-esm1.md) | Mar 25, 2024 |
| Linux | libnetty-java Ubuntu 24.04.5 LTS (noble) | 1:4.1.48-9ubuntu0.1~esm1 | [libnetty-java 1:4.1.48-9ubuntu0.1~esm1](https://patchblox.com/security/data/fix/linux/ubuntu-noble-libnetty-java-1-4.1.48-9ubuntu0.1-esm1.md) | May 6, 2022 |
| Linux | libnetty-java Ubuntu 24.10 (oracular) | 1:4.1.48-10ubuntu0.1 | [libnetty-java 1:4.1.48-10ubuntu0.1](https://patchblox.com/security/data/fix/linux/ubuntu-oracular-libnetty-java-1-4.1.48-10ubuntu0.1.md) | Jan 16, 2026 |

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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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