# libprotobuf17 security updates

Patch Radar has 3 security fixes for libprotobuf17, closing 6 CVEs. The newest security fix is libprotobuf17 3.6.1.3-2ubuntu5.2+esm3, released January 23, 2026.

- Web page: https://patchblox.com/security/product/linux/libprotobuf17
- Platform: Linux
- Supported: yes

## Security fixes, newest first

| Fix | Released | Fixed in | Priority | CVEs | Exploited |
|---|---|---|---|---:|---:|
| [libprotobuf17 3.6.1.3-2ubuntu5.2+esm3](https://patchblox.com/security/data/fix/linux/ubuntu-focal-libprotobuf17-3.6.1.3-2ubuntu5.2-esm3.md) | Jan 23, 2026 | Ubuntu 20.04 LTS (focal) 3.6.1.3-2ubuntu5.2+esm3 | High | 1 | 0 |
| [libprotobuf17 3.6.1.3-2ubuntu5.2+esm2](https://patchblox.com/security/data/fix/linux/ubuntu-focal-libprotobuf17-3.6.1.3-2ubuntu5.2-esm2.md) | Jun 16, 2025 | Ubuntu 20.04 LTS (focal) 3.6.1.3-2ubuntu5.2+esm2 | High | 2 | 0 |
| [libprotobuf17 3.6.1.3-2ubuntu5.2](https://patchblox.com/security/data/fix/linux/ubuntu-focal-libprotobuf17-3.6.1.3-2ubuntu5.2.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 2026-11-07T12:40:37Z 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 Patchblox finds out-of-date software on Windows, macOS and Linux and updates it through release rings: https://patchblox.com/demo

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