# libnetty-java security updates

Patch Radar has 42 security fixes for libnetty-java, closing 31 CVEs, 1 of which is being exploited. The newest is libnetty-java 1:4.1.48-9ubuntu0.2+esm2 (1:4.1.48-9ubuntu0.2+esm2), released June 12, 2026.

- Web page: https://patchblox.com/security/product/linux/libnetty-java
- Platform: Linux
- Supported: yes

## Security fixes, newest first

| Fix | Released | Fixed in | Priority | CVEs | Exploited |
|---|---|---|---|---:|---:|
| [libnetty-java 1:4.1.48-9ubuntu0.2+esm2](https://patchblox.com/security/data/fix/linux/ubuntu-noble-libnetty-java-1-4.1.48-9ubuntu0.2-esm2.md) | Jun 12, 2026 | Ubuntu 24.04.5 LTS (noble) 1:4.1.48-9ubuntu0.2+esm2 | High | 1 | 0 |
| [libnetty-java 1:4.1.45-1ubuntu0.1~esm6](https://patchblox.com/security/data/fix/linux/ubuntu-focal-libnetty-java-1-4.1.45-1ubuntu0.1-esm6.md) | May 13, 2026 | Ubuntu 20.04 LTS (focal) 1:4.1.45-1ubuntu0.1~esm6 | High | 6 | 0 |
| [libnetty-java 1:4.1.48-4+deb11u2ubuntu0.1+esm3](https://patchblox.com/security/data/fix/linux/ubuntu-jammy-libnetty-java-1-4.1.48-4-deb11u2ubuntu0.1-esm3.md) | May 13, 2026 | Ubuntu 22.04.1 LTS (jammy) 1:4.1.48-4+deb11u2ubuntu0.1+esm3 | High | 6 | 0 |
| [libnetty-java 1:4.1.48-9ubuntu0.1+esm3](https://patchblox.com/security/data/fix/linux/ubuntu-noble-libnetty-java-1-4.1.48-9ubuntu0.1-esm3.md) | May 13, 2026 | Ubuntu 24.04.5 LTS (noble) 1:4.1.48-9ubuntu0.1+esm3 | High | 6 | 0 |
| [libnetty-java 1:4.1.7-4ubuntu0.1+esm6](https://patchblox.com/security/data/fix/linux/ubuntu-bionic-libnetty-java-1-4.1.7-4ubuntu0.1-esm6.md) | May 13, 2026 | Ubuntu 18.04.6 LTS (bionic) 1:4.1.7-4ubuntu0.1+esm6 | High | 5 | 0 |
| [libnetty-java 1:4.1.48-10ubuntu0.25.04.1](https://patchblox.com/security/data/fix/linux/ubuntu-plucky-libnetty-java-1-4.1.48-10ubuntu0.25.04.1.md) | Jan 16, 2026 | Ubuntu 25.04 (plucky) 1:4.1.48-10ubuntu0.25.04.1 | Routine | 1 | 0 |
| [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 | Ubuntu 25.04 (plucky) 4.1.48-6 | High | 5 | 0 |
| [libnetty-java 4.1.48-3](https://patchblox.com/security/data/fix/linux/ubuntu-plucky-libnetty-java-4.1.48-3.md) | Jan 16, 2026 | Ubuntu 25.04 (plucky) 4.1.48-3 | Routine | 1 | 0 |
| [libnetty-java 4.1.48-4](https://patchblox.com/security/data/fix/linux/ubuntu-plucky-libnetty-java-4.1.48-4.md) | Jan 16, 2026 | Ubuntu 25.04 (plucky) 4.1.48-4 | Routine | 1 | 0 |
| [libnetty-java 4.1.48-2](https://patchblox.com/security/data/fix/linux/ubuntu-plucky-libnetty-java-4.1.48-2.md) | Jan 16, 2026 | Ubuntu 25.04 (plucky) 4.1.48-2 | Routine | 1 | 0 |
| [libnetty-java 4.1.48-10](https://patchblox.com/security/data/fix/linux/ubuntu-plucky-libnetty-java-4.1.48-10.md) | Jan 16, 2026 | Ubuntu 25.04 (plucky) 4.1.48-10 | Routine | 1 | 0 |
| [libnetty-java 4.1.48-10](https://patchblox.com/security/data/fix/linux/ubuntu-oracular-libnetty-java-4.1.48-10.md) | Jan 16, 2026 | Ubuntu 24.10 (oracular) 4.1.48-10 | Routine | 1 | 0 |
| [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 | Ubuntu 24.10 (oracular) 1:4.1.48-10ubuntu0.1 | Routine | 1 | 0 |
| [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 | Ubuntu 24.10 (oracular) 4.1.48-6 | High | 5 | 0 |
| [libnetty-java 4.1.48-3](https://patchblox.com/security/data/fix/linux/ubuntu-oracular-libnetty-java-4.1.48-3.md) | Jan 16, 2026 | Ubuntu 24.10 (oracular) 4.1.48-3 | Routine | 1 | 0 |
| [libnetty-java 4.1.48-4](https://patchblox.com/security/data/fix/linux/ubuntu-oracular-libnetty-java-4.1.48-4.md) | Jan 16, 2026 | Ubuntu 24.10 (oracular) 4.1.48-4 | Routine | 1 | 0 |
| [libnetty-java 4.1.48-2](https://patchblox.com/security/data/fix/linux/ubuntu-oracular-libnetty-java-4.1.48-2.md) | Jan 16, 2026 | Ubuntu 24.10 (oracular) 4.1.48-2 | Routine | 1 | 0 |
| [libnetty-java 1:4.1.45-1ubuntu0.1~esm7](https://patchblox.com/security/data/fix/linux/ubuntu-focal-libnetty-java-1-4.1.45-1ubuntu0.1-esm7.md) | Dec 15, 2025 | Ubuntu 20.04 LTS (focal) 1:4.1.45-1ubuntu0.1~esm7 | High | 2 | 0 |
| [libnetty-java 1:4.1.48-4+deb11u2ubuntu0.2+esm1](https://patchblox.com/security/data/fix/linux/ubuntu-jammy-libnetty-java-1-4.1.48-4-deb11u2ubuntu0.2-esm1.md) | Dec 15, 2025 | Ubuntu 22.04.1 LTS (jammy) 1:4.1.48-4+deb11u2ubuntu0.2+esm1 | High | 2 | 0 |
| [libnetty-java 1:4.1.48-9ubuntu0.2+esm1](https://patchblox.com/security/data/fix/linux/ubuntu-noble-libnetty-java-1-4.1.48-9ubuntu0.2-esm1.md) | Dec 15, 2025 | Ubuntu 24.04.5 LTS (noble) 1:4.1.48-9ubuntu0.2+esm1 | High | 2 | 0 |
| [libnetty-java 1:4.1.7-4ubuntu0.1+esm7](https://patchblox.com/security/data/fix/linux/ubuntu-bionic-libnetty-java-1-4.1.7-4ubuntu0.1-esm7.md) | Dec 15, 2025 | Ubuntu 18.04.6 LTS (bionic) 1:4.1.7-4ubuntu0.1+esm7 | High | 2 | 0 |
| [libnetty-java 1:4.1.45-1ubuntu0.1~esm3](https://patchblox.com/security/data/fix/linux/ubuntu-focal-libnetty-java-1-4.1.45-1ubuntu0.1-esm3.md) | Oct 15, 2025 | Ubuntu 20.04 LTS (focal) 1:4.1.45-1ubuntu0.1~esm3 | Routine | 1 | 0 |
| [libnetty-java 1:4.1.48-10ubuntu0.25.10.1](https://patchblox.com/security/data/fix/linux/ubuntu-questing-libnetty-java-1-4.1.48-10ubuntu0.25.10.1.md) | Oct 15, 2025 | Ubuntu 25.10 (questing) 1:4.1.48-10ubuntu0.25.10.1 | Routine | 1 | 0 |
| [libnetty-java 1:4.1.48-4+deb11u2ubuntu0.1~esm2](https://patchblox.com/security/data/fix/linux/ubuntu-jammy-libnetty-java-1-4.1.48-4-deb11u2ubuntu0.1-esm2.md) | Oct 15, 2025 | Ubuntu 22.04.1 LTS (jammy) 1:4.1.48-4+deb11u2ubuntu0.1~esm2 | Routine | 1 | 0 |
| [libnetty-java 1:4.1.48-9ubuntu0.1~esm2](https://patchblox.com/security/data/fix/linux/ubuntu-noble-libnetty-java-1-4.1.48-9ubuntu0.1-esm2.md) | Oct 15, 2025 | Ubuntu 24.04.5 LTS (noble) 1:4.1.48-9ubuntu0.1~esm2 | Routine | 1 | 0 |
| [libnetty-java 1:4.1.7-4ubuntu0.1+esm4](https://patchblox.com/security/data/fix/linux/ubuntu-bionic-libnetty-java-1-4.1.7-4ubuntu0.1-esm4.md) | Oct 15, 2025 | Ubuntu 18.04.6 LTS (bionic) 1:4.1.7-4ubuntu0.1+esm4 | Routine | 1 | 0 |
| [libnetty-java 1:4.1.45-1ubuntu0.1~esm4](https://patchblox.com/security/data/fix/linux/ubuntu-focal-libnetty-java-1-4.1.45-1ubuntu0.1-esm4.md) | Sep 4, 2025 | Ubuntu 20.04 LTS (focal) 1:4.1.45-1ubuntu0.1~esm4 | High | 2 | 0 |
| [libnetty-java 1:4.1.48-10ubuntu0.25.10.2](https://patchblox.com/security/data/fix/linux/ubuntu-questing-libnetty-java-1-4.1.48-10ubuntu0.25.10.2.md) | Sep 4, 2025 | Ubuntu 25.10 (questing) 1:4.1.48-10ubuntu0.25.10.2 | High | 2 | 0 |
| [libnetty-java 1:4.1.48-4+deb11u2ubuntu0.1](https://patchblox.com/security/data/fix/linux/ubuntu-jammy-libnetty-java-1-4.1.48-4-deb11u2ubuntu0.1.md) | Sep 4, 2025 | Ubuntu 22.04.1 LTS (jammy) 1:4.1.48-4+deb11u2ubuntu0.1 | High | 2 | 0 |
| [libnetty-java 1:4.1.48-9ubuntu0.1](https://patchblox.com/security/data/fix/linux/ubuntu-noble-libnetty-java-1-4.1.48-9ubuntu0.1.md) | Sep 4, 2025 | Ubuntu 24.04.5 LTS (noble) 1:4.1.48-9ubuntu0.1 | High | 2 | 0 |
| [libnetty-java 1:4.1.7-4ubuntu0.1+esm5](https://patchblox.com/security/data/fix/linux/ubuntu-bionic-libnetty-java-1-4.1.7-4ubuntu0.1-esm5.md) | Sep 4, 2025 | Ubuntu 18.04.6 LTS (bionic) 1:4.1.7-4ubuntu0.1+esm5 | High | 2 | 0 |
| [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 | Ubuntu 20.04 LTS (focal) 1:4.1.45-1ubuntu0.1~esm2 | Routine | 2 | 0 |
| [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 | Ubuntu 22.04.1 LTS (jammy) 1:4.1.48-4+deb11u2ubuntu0.1~esm1 | Routine | 2 | 0 |
| [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 | Ubuntu 18.04.6 LTS (bionic) 1:4.1.7-4ubuntu0.1+esm3 | Routine | 2 | 0 |
| [libnetty-java 1:4.1.48-4+deb11u2build0.22.04.1](https://patchblox.com/security/data/fix/linux/ubuntu-jammy-libnetty-java-1-4.1.48-4-deb11u2build0.22.04.1.md) | Oct 9, 2023 | Ubuntu 22.04.1 LTS (jammy) 1:4.1.48-4+deb11u2build0.22.04.1 | Patch now | 2 | 1 |
| [libnetty-java 1:4.1.48-9](https://patchblox.com/security/data/fix/linux/ubuntu-noble-libnetty-java-1-4.1.48-9.md) | Jun 22, 2023 | Ubuntu 24.04.5 LTS (noble) 1:4.1.48-9 | Routine | 1 | 0 |
| [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 | Ubuntu 20.04 LTS (focal) 1:4.1.45-1ubuntu0.1~esm1 | High | 9 | 0 |
| [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 | Ubuntu 22.04.1 LTS (jammy) 1:4.1.48-4+deb11u1build0.22.04.1 | High | 8 | 0 |
| [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 | Ubuntu 18.04.6 LTS (bionic) 1:4.1.7-4ubuntu0.1+esm2 | High | 8 | 0 |
| [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 | Ubuntu 24.04.5 LTS (noble) 1:4.1.48-9ubuntu0.1~esm1 | Routine | 1 | 0 |
| [libnetty-java 1:4.1.7-4ubuntu0.1](https://patchblox.com/security/data/fix/linux/ubuntu-bionic-libnetty-java-1-4.1.7-4ubuntu0.1.md) | Apr 7, 2020 | Ubuntu 18.04.6 LTS (bionic) 1:4.1.7-4ubuntu0.1 | Routine | 3 | 0 |
| [libnetty-java 1:4.1.7-4ubuntu0.1+esm1](https://patchblox.com/security/data/fix/linux/ubuntu-bionic-libnetty-java-1-4.1.7-4ubuntu0.1-esm1.md) | Aug 12, 2019 | Ubuntu 18.04.6 LTS (bionic) 1:4.1.7-4ubuntu0.1+esm1 | High | 4 | 0 |

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Data as of 2026-11-07T00:32:44Z 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