# libzmq5 security updates

Patch Radar has 6 security fixes for libzmq5, closing 6 CVEs. The newest is libzmq5 4.2.5-1ubuntu0.2+esm2 (4.2.5-1ubuntu0.2+esm2), released May 28, 2021.

- Web page: https://patchblox.com/security/product/linux/libzmq5
- Platform: Linux
- Supported: yes

## Security fixes, newest first

| Fix | Released | Fixed in | Priority | CVEs | Exploited |
|---|---|---|---|---:|---:|
| [libzmq5 4.2.5-1ubuntu0.2+esm2](https://patchblox.com/security/data/fix/linux/ubuntu-bionic-libzmq5-4.2.5-1ubuntu0.2-esm2.md) | May 28, 2021 | Ubuntu 18.04.6 LTS (bionic) 4.2.5-1ubuntu0.2+esm2 | Routine | 3 | 0 |
| [libzmq5 4.3.2-2ubuntu1.20.04.1~esm2](https://patchblox.com/security/data/fix/linux/ubuntu-focal-libzmq5-4.3.2-2ubuntu1.20.04.1-esm2.md) | May 28, 2021 | Ubuntu 20.04 LTS (focal) 4.3.2-2ubuntu1.20.04.1~esm2 | Routine | 3 | 0 |
| [libzmq5 4.2.5-1ubuntu0.2+esm1](https://patchblox.com/security/data/fix/linux/ubuntu-bionic-libzmq5-4.2.5-1ubuntu0.2-esm1.md) | Sep 11, 2020 | Ubuntu 18.04.6 LTS (bionic) 4.2.5-1ubuntu0.2+esm1 | Routine | 1 | 0 |
| [libzmq5 4.3.2-2ubuntu1.20.04.1~esm1](https://patchblox.com/security/data/fix/linux/ubuntu-focal-libzmq5-4.3.2-2ubuntu1.20.04.1-esm1.md) | Sep 11, 2020 | Ubuntu 20.04 LTS (focal) 4.3.2-2ubuntu1.20.04.1~esm1 | Routine | 1 | 0 |
| [libzmq5 4.2.5-1ubuntu0.2](https://patchblox.com/security/data/fix/linux/ubuntu-bionic-libzmq5-4.2.5-1ubuntu0.2.md) | Jul 8, 2019 | Ubuntu 18.04.6 LTS (bionic) 4.2.5-1ubuntu0.2 | High | 1 | 0 |
| [libzmq5 4.2.5-1ubuntu0.1](https://patchblox.com/security/data/fix/linux/ubuntu-bionic-libzmq5-4.2.5-1ubuntu0.1.md) | Jan 13, 2019 | Ubuntu 18.04.6 LTS (bionic) 4.2.5-1ubuntu0.1 | Routine | 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 Patchblox finds out-of-date software on Windows, macOS and Linux and updates it through release rings: https://patchblox.com/demo