# libprotobuf32t64 security updates

Patch Radar has 7 security fixes for libprotobuf32t64, closing 3 CVEs. The newest is libprotobuf32t64 3.21.12-11ubuntu3.1 (3.21.12-11ubuntu3.1), released January 23, 2026.

- Web page: https://patchblox.com/security/product/linux/libprotobuf32t64
- Platform: Linux
- Supported: yes

## Security fixes, newest first

| Fix | Released | Fixed in | Priority | CVEs | Exploited |
|---|---|---|---|---:|---:|
| [libprotobuf32t64 3.21.12-11ubuntu3.1](https://patchblox.com/security/data/fix/linux/ubuntu-questing-libprotobuf32t64-3.21.12-11ubuntu3.1.md) | Jan 23, 2026 | Ubuntu 25.10 (questing) 3.21.12-11ubuntu3.1 | High | 1 | 0 |
| [libprotobuf32t64 3.21.12-15ubuntu1](https://patchblox.com/security/data/fix/linux/ubuntu-resolute-libprotobuf32t64-3.21.12-15ubuntu1.md) | Jan 23, 2026 | Ubuntu 26.04.1 LTS (resolute) 3.21.12-15ubuntu1 | High | 1 | 0 |
| [libprotobuf32t64 3.21.12-8.2ubuntu0.3](https://patchblox.com/security/data/fix/linux/ubuntu-noble-libprotobuf32t64-3.21.12-8.2ubuntu0.3.md) | Jan 23, 2026 | Ubuntu 24.04.5 LTS (noble) 3.21.12-8.2ubuntu0.3 | High | 1 | 0 |
| [libprotobuf32t64 3.21.12-10ubuntu0.1](https://patchblox.com/security/data/fix/linux/ubuntu-plucky-libprotobuf32t64-3.21.12-10ubuntu0.1.md) | Jan 16, 2026 | Ubuntu 25.04 (plucky) 3.21.12-10ubuntu0.1 | High | 2 | 0 |
| [libprotobuf32t64 3.21.12-9ubuntu1.1](https://patchblox.com/security/data/fix/linux/ubuntu-oracular-libprotobuf32t64-3.21.12-9ubuntu1.1.md) | Jan 16, 2026 | Ubuntu 24.10 (oracular) 3.21.12-9ubuntu1.1 | High | 1 | 0 |
| [libprotobuf32t64 3.21.12-8.2ubuntu0.2](https://patchblox.com/security/data/fix/linux/ubuntu-noble-libprotobuf32t64-3.21.12-8.2ubuntu0.2.md) | Jun 16, 2025 | Ubuntu 24.04.5 LTS (noble) 3.21.12-8.2ubuntu0.2 | Routine | 1 | 0 |
| [libprotobuf32t64 3.21.12-8.2ubuntu0.1](https://patchblox.com/security/data/fix/linux/ubuntu-noble-libprotobuf32t64-3.21.12-8.2ubuntu0.1.md) | Sep 18, 2024 | Ubuntu 24.04.5 LTS (noble) 3.21.12-8.2ubuntu0.1 | High | 1 | 0 |

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Data as of 2026-11-07T06:34:28Z 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 Patchblox finds out-of-date software on Windows, macOS and Linux and updates it through release rings: https://patchblox.com/demo