# libprotobuf-java security updates

Patch Radar has 16 security fixes for libprotobuf-java, closing 6 CVEs. The newest is libprotobuf-java 3.0.0-9.1ubuntu1.1+esm4 (3.0.0-9.1ubuntu1.1+esm4), released January 23, 2026.

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

## Security fixes, newest first

| Fix | Released | Fixed in | Priority | CVEs | Exploited |
|---|---|---|---|---:|---:|
| [libprotobuf-java 3.0.0-9.1ubuntu1.1+esm4](https://patchblox.com/security/data/fix/linux/ubuntu-bionic-libprotobuf-java-3.0.0-9.1ubuntu1.1-esm4.md) | Jan 23, 2026 | Ubuntu 18.04.6 LTS (bionic) 3.0.0-9.1ubuntu1.1+esm4 | High | 1 | 0 |
| [libprotobuf-java 3.12.4-1ubuntu7.22.04.6](https://patchblox.com/security/data/fix/linux/ubuntu-jammy-libprotobuf-java-3.12.4-1ubuntu7.22.04.6.md) | Jan 23, 2026 | Ubuntu 22.04.1 LTS (jammy) 3.12.4-1ubuntu7.22.04.6 | High | 1 | 0 |
| [libprotobuf-java 3.21.12-11ubuntu3.1](https://patchblox.com/security/data/fix/linux/ubuntu-questing-libprotobuf-java-3.21.12-11ubuntu3.1.md) | Jan 23, 2026 | Ubuntu 25.10 (questing) 3.21.12-11ubuntu3.1 | High | 1 | 0 |
| [libprotobuf-java 3.21.12-8.2ubuntu0.3](https://patchblox.com/security/data/fix/linux/ubuntu-noble-libprotobuf-java-3.21.12-8.2ubuntu0.3.md) | Jan 23, 2026 | Ubuntu 24.04.5 LTS (noble) 3.21.12-8.2ubuntu0.3 | High | 1 | 0 |
| [libprotobuf-java 3.6.1.3-2ubuntu5.2+esm3](https://patchblox.com/security/data/fix/linux/ubuntu-focal-libprotobuf-java-3.6.1.3-2ubuntu5.2-esm3.md) | Jan 23, 2026 | Ubuntu 20.04 LTS (focal) 3.6.1.3-2ubuntu5.2+esm3 | High | 1 | 0 |
| [libprotobuf-java 3.21.12-10ubuntu0.1](https://patchblox.com/security/data/fix/linux/ubuntu-plucky-libprotobuf-java-3.21.12-10ubuntu0.1.md) | Jan 16, 2026 | Ubuntu 25.04 (plucky) 3.21.12-10ubuntu0.1 | High | 2 | 0 |
| [libprotobuf-java 3.21.12-9ubuntu1.1](https://patchblox.com/security/data/fix/linux/ubuntu-oracular-libprotobuf-java-3.21.12-9ubuntu1.1.md) | Jan 16, 2026 | Ubuntu 24.10 (oracular) 3.21.12-9ubuntu1.1 | High | 1 | 0 |
| [libprotobuf-java 3.0.0-9.1ubuntu1.1+esm3](https://patchblox.com/security/data/fix/linux/ubuntu-bionic-libprotobuf-java-3.0.0-9.1ubuntu1.1-esm3.md) | Jun 16, 2025 | Ubuntu 18.04.6 LTS (bionic) 3.0.0-9.1ubuntu1.1+esm3 | High | 2 | 0 |
| [libprotobuf-java 3.6.1.3-2ubuntu5.2+esm2](https://patchblox.com/security/data/fix/linux/ubuntu-focal-libprotobuf-java-3.6.1.3-2ubuntu5.2-esm2.md) | Jun 16, 2025 | Ubuntu 20.04 LTS (focal) 3.6.1.3-2ubuntu5.2+esm2 | High | 2 | 0 |
| [libprotobuf-java 3.12.4-1ubuntu7.22.04.4](https://patchblox.com/security/data/fix/linux/ubuntu-jammy-libprotobuf-java-3.12.4-1ubuntu7.22.04.4.md) | Jun 16, 2025 | Ubuntu 22.04.1 LTS (jammy) 3.12.4-1ubuntu7.22.04.4 | Routine | 1 | 0 |
| [libprotobuf-java 3.21.12-8.2ubuntu0.2](https://patchblox.com/security/data/fix/linux/ubuntu-noble-libprotobuf-java-3.21.12-8.2ubuntu0.2.md) | Jun 16, 2025 | Ubuntu 24.04.5 LTS (noble) 3.21.12-8.2ubuntu0.2 | Routine | 1 | 0 |
| [libprotobuf-java 3.12.4-1ubuntu7.22.04.2](https://patchblox.com/security/data/fix/linux/ubuntu-jammy-libprotobuf-java-3.12.4-1ubuntu7.22.04.2.md) | Sep 18, 2024 | Ubuntu 22.04.1 LTS (jammy) 3.12.4-1ubuntu7.22.04.2 | High | 1 | 0 |
| [libprotobuf-java 3.21.12-8.2ubuntu0.1](https://patchblox.com/security/data/fix/linux/ubuntu-noble-libprotobuf-java-3.21.12-8.2ubuntu0.1.md) | Sep 18, 2024 | Ubuntu 24.04.5 LTS (noble) 3.21.12-8.2ubuntu0.1 | High | 1 | 0 |
| [libprotobuf-java 3.0.0-9.1ubuntu1.1](https://patchblox.com/security/data/fix/linux/ubuntu-bionic-libprotobuf-java-3.0.0-9.1ubuntu1.1.md) | Sep 22, 2022 | Ubuntu 18.04.6 LTS (bionic) 3.0.0-9.1ubuntu1.1 | High | 3 | 0 |
| [libprotobuf-java 3.12.4-1ubuntu7.22.04.1](https://patchblox.com/security/data/fix/linux/ubuntu-jammy-libprotobuf-java-3.12.4-1ubuntu7.22.04.1.md) | Sep 22, 2022 | Ubuntu 22.04.1 LTS (jammy) 3.12.4-1ubuntu7.22.04.1 | High | 3 | 0 |
| [libprotobuf-java 3.6.1.3-2ubuntu5.2](https://patchblox.com/security/data/fix/linux/ubuntu-focal-libprotobuf-java-3.6.1.3-2ubuntu5.2.md) | Sep 22, 2022 | Ubuntu 20.04 LTS (focal) 3.6.1.3-2ubuntu5.2 | High | 3 | 0 |

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Data as of 2026-11-06T17:00:54Z 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