# libpostproc55 security updates

Patch Radar has 36 security fixes for libpostproc55, closing 123 CVEs. The newest security fix is libpostproc55 7:4.2.7-0ubuntu0.1+esm18, released September 8, 2026.

- Web page: https://patchblox.com/security/product/linux/libpostproc55
- Platform: Linux
- Supported: yes

## Security fixes, newest first

| Fix | Released | Fixed in | Priority | CVEs | Exploited |
|---|---|---|---|---:|---:|
| [libpostproc55 7:4.2.7-0ubuntu0.1+esm18](https://patchblox.com/security/data/fix/linux/ubuntu-focal-libpostproc55-7-4.2.7-0ubuntu0.1-esm18.md) | Sep 8, 2026 | Ubuntu 20.04 LTS (focal) 7:4.2.7-0ubuntu0.1+esm18 | High | 8 | 0 |
| [libpostproc55 7:4.4.2-0ubuntu0.22.04.1+esm17](https://patchblox.com/security/data/fix/linux/ubuntu-jammy-libpostproc55-7-4.4.2-0ubuntu0.22.04.1-esm17.md) | Sep 8, 2026 | Ubuntu 22.04.1 LTS (jammy) 7:4.4.2-0ubuntu0.22.04.1+esm17 | High | 8 | 0 |
| [libpostproc55 7:4.4.2-0ubuntu0.22.04.1+esm15](https://patchblox.com/security/data/fix/linux/ubuntu-jammy-libpostproc55-7-4.4.2-0ubuntu0.22.04.1-esm15.md) | Sep 5, 2026 | Ubuntu 22.04.1 LTS (jammy) 7:4.4.2-0ubuntu0.22.04.1+esm15 | Routine | 14 | 0 |
| [libpostproc55 7:4.2.7-0ubuntu0.1+esm16](https://patchblox.com/security/data/fix/linux/ubuntu-focal-libpostproc55-7-4.2.7-0ubuntu0.1-esm16.md) | Sep 5, 2026 | Ubuntu 20.04 LTS (focal) 7:4.2.7-0ubuntu0.1+esm16 | Routine | 11 | 0 |
| [libpostproc55 7:4.4.2-0ubuntu0.22.04.1+esm14](https://patchblox.com/security/data/fix/linux/ubuntu-jammy-libpostproc55-7-4.4.2-0ubuntu0.22.04.1-esm14.md) | Aug 27, 2026 | Ubuntu 22.04.1 LTS (jammy) 7:4.4.2-0ubuntu0.22.04.1+esm14 | Routine | 2 | 0 |
| [libpostproc55 7:4.2.7-0ubuntu0.1+esm15](https://patchblox.com/security/data/fix/linux/ubuntu-focal-libpostproc55-7-4.2.7-0ubuntu0.1-esm15.md) | Aug 27, 2026 | Ubuntu 20.04 LTS (focal) 7:4.2.7-0ubuntu0.1+esm15 | Routine | 1 | 0 |
| [libpostproc55 7:4.2.7-0ubuntu0.1+esm17](https://patchblox.com/security/data/fix/linux/ubuntu-focal-libpostproc55-7-4.2.7-0ubuntu0.1-esm17.md) | Aug 6, 2026 | Ubuntu 20.04 LTS (focal) 7:4.2.7-0ubuntu0.1+esm17 | High | 7 | 0 |
| [libpostproc55 7:4.4.2-0ubuntu0.22.04.1+esm16](https://patchblox.com/security/data/fix/linux/ubuntu-jammy-libpostproc55-7-4.4.2-0ubuntu0.22.04.1-esm16.md) | Aug 6, 2026 | Ubuntu 22.04.1 LTS (jammy) 7:4.4.2-0ubuntu0.22.04.1+esm16 | High | 7 | 0 |
| [libpostproc55 7:4.2.7-0ubuntu0.1+esm14](https://patchblox.com/security/data/fix/linux/ubuntu-focal-libpostproc55-7-4.2.7-0ubuntu0.1-esm14.md) | Jul 24, 2026 | Ubuntu 20.04 LTS (focal) 7:4.2.7-0ubuntu0.1+esm14 | High | 3 | 0 |
| [libpostproc55 7:4.4.2-0ubuntu0.22.04.1+esm13](https://patchblox.com/security/data/fix/linux/ubuntu-jammy-libpostproc55-7-4.4.2-0ubuntu0.22.04.1-esm13.md) | Jul 24, 2026 | Ubuntu 22.04.1 LTS (jammy) 7:4.4.2-0ubuntu0.22.04.1+esm13 | High | 3 | 0 |
| [libpostproc55 7:4.2.7-0ubuntu0.1+esm13](https://patchblox.com/security/data/fix/linux/ubuntu-focal-libpostproc55-7-4.2.7-0ubuntu0.1-esm13.md) | Apr 15, 2026 | Ubuntu 20.04 LTS (focal) 7:4.2.7-0ubuntu0.1+esm13 | Urgent | 1 | 0 |
| [libpostproc55 7:4.4.2-0ubuntu0.22.04.1+esm12](https://patchblox.com/security/data/fix/linux/ubuntu-jammy-libpostproc55-7-4.4.2-0ubuntu0.22.04.1-esm12.md) | Apr 15, 2026 | Ubuntu 22.04.1 LTS (jammy) 7:4.4.2-0ubuntu0.22.04.1+esm12 | Urgent | 1 | 0 |
| [libpostproc55 7:4.4.2-0ubuntu0.22.04.1+esm11](https://patchblox.com/security/data/fix/linux/ubuntu-jammy-libpostproc55-7-4.4.2-0ubuntu0.22.04.1-esm11.md) | Dec 18, 2025 | Ubuntu 22.04.1 LTS (jammy) 7:4.4.2-0ubuntu0.22.04.1+esm11 | High | 5 | 0 |
| [libpostproc55 7:4.2.7-0ubuntu0.1+esm12](https://patchblox.com/security/data/fix/linux/ubuntu-focal-libpostproc55-7-4.2.7-0ubuntu0.1-esm12.md) | Dec 18, 2025 | Ubuntu 20.04 LTS (focal) 7:4.2.7-0ubuntu0.1+esm12 | High | 3 | 0 |
| [libpostproc55 7:4.2.7-0ubuntu0.1+esm11](https://patchblox.com/security/data/fix/linux/ubuntu-focal-libpostproc55-7-4.2.7-0ubuntu0.1-esm11.md) | Sep 15, 2025 | Ubuntu 20.04 LTS (focal) 7:4.2.7-0ubuntu0.1+esm11 | High | 3 | 0 |
| [libpostproc55 7:4.4.2-0ubuntu0.22.04.1+esm10](https://patchblox.com/security/data/fix/linux/ubuntu-jammy-libpostproc55-7-4.4.2-0ubuntu0.22.04.1-esm10.md) | Sep 15, 2025 | Ubuntu 22.04.1 LTS (jammy) 7:4.4.2-0ubuntu0.22.04.1+esm10 | High | 3 | 0 |
| [libpostproc55 7:4.2.7-0ubuntu0.1+esm9](https://patchblox.com/security/data/fix/linux/ubuntu-focal-libpostproc55-7-4.2.7-0ubuntu0.1-esm9.md) | Feb 23, 2025 | Ubuntu 20.04 LTS (focal) 7:4.2.7-0ubuntu0.1+esm9 | High | 1 | 0 |
| [libpostproc55 7:4.4.2-0ubuntu0.22.04.1+esm8](https://patchblox.com/security/data/fix/linux/ubuntu-jammy-libpostproc55-7-4.4.2-0ubuntu0.22.04.1-esm8.md) | Feb 23, 2025 | Ubuntu 22.04.1 LTS (jammy) 7:4.4.2-0ubuntu0.22.04.1+esm8 | High | 1 | 0 |
| [libpostproc55 7:4.4.2-0ubuntu0.22.04.1+esm7](https://patchblox.com/security/data/fix/linux/ubuntu-jammy-libpostproc55-7-4.4.2-0ubuntu0.22.04.1-esm7.md) | Feb 18, 2025 | Ubuntu 22.04.1 LTS (jammy) 7:4.4.2-0ubuntu0.22.04.1+esm7 | Routine | 4 | 0 |
| [libpostproc55 7:4.2.7-0ubuntu0.1+esm8](https://patchblox.com/security/data/fix/linux/ubuntu-focal-libpostproc55-7-4.2.7-0ubuntu0.1-esm8.md) | Feb 18, 2025 | Ubuntu 20.04 LTS (focal) 7:4.2.7-0ubuntu0.1+esm8 | Routine | 3 | 0 |
| [libpostproc55 7:4.4.2-0ubuntu0.22.04.1+esm9](https://patchblox.com/security/data/fix/linux/ubuntu-jammy-libpostproc55-7-4.4.2-0ubuntu0.22.04.1-esm9.md) | Jan 3, 2025 | Ubuntu 22.04.1 LTS (jammy) 7:4.4.2-0ubuntu0.22.04.1+esm9 | Urgent | 7 | 0 |
| [libpostproc55 7:4.2.7-0ubuntu0.1+esm10](https://patchblox.com/security/data/fix/linux/ubuntu-focal-libpostproc55-7-4.2.7-0ubuntu0.1-esm10.md) | Jan 3, 2025 | Ubuntu 20.04 LTS (focal) 7:4.2.7-0ubuntu0.1+esm10 | Urgent | 6 | 0 |
| [libpostproc55 7:4.2.7-0ubuntu0.1+esm7](https://patchblox.com/security/data/fix/linux/ubuntu-focal-libpostproc55-7-4.2.7-0ubuntu0.1-esm7.md) | Nov 29, 2024 | Ubuntu 20.04 LTS (focal) 7:4.2.7-0ubuntu0.1+esm7 | Routine | 1 | 0 |
| [libpostproc55 7:4.4.2-0ubuntu0.22.04.1+esm6](https://patchblox.com/security/data/fix/linux/ubuntu-jammy-libpostproc55-7-4.4.2-0ubuntu0.22.04.1-esm6.md) | Nov 29, 2024 | Ubuntu 22.04.1 LTS (jammy) 7:4.4.2-0ubuntu0.22.04.1+esm6 | Routine | 1 | 0 |
| [libpostproc55 7:4.2.7-0ubuntu0.1+esm6](https://patchblox.com/security/data/fix/linux/ubuntu-focal-libpostproc55-7-4.2.7-0ubuntu0.1-esm6.md) | Jul 1, 2024 | Ubuntu 20.04 LTS (focal) 7:4.2.7-0ubuntu0.1+esm6 | High | 1 | 0 |
| [libpostproc55 7:4.4.2-0ubuntu0.22.04.1+esm5](https://patchblox.com/security/data/fix/linux/ubuntu-jammy-libpostproc55-7-4.4.2-0ubuntu0.22.04.1-esm5.md) | Jul 1, 2024 | Ubuntu 22.04.1 LTS (jammy) 7:4.4.2-0ubuntu0.22.04.1+esm5 | High | 1 | 0 |
| [libpostproc55 7:4.4.2-0ubuntu0.22.04.1+esm4](https://patchblox.com/security/data/fix/linux/ubuntu-jammy-libpostproc55-7-4.4.2-0ubuntu0.22.04.1-esm4.md) | Apr 26, 2024 | Ubuntu 22.04.1 LTS (jammy) 7:4.4.2-0ubuntu0.22.04.1+esm4 | High | 6 | 0 |
| [libpostproc55 7:4.2.7-0ubuntu0.1+esm5](https://patchblox.com/security/data/fix/linux/ubuntu-focal-libpostproc55-7-4.2.7-0ubuntu0.1-esm5.md) | Apr 26, 2024 | Ubuntu 20.04 LTS (focal) 7:4.2.7-0ubuntu0.1+esm5 | High | 5 | 0 |
| [libpostproc55 7:4.2.7-0ubuntu0.1](https://patchblox.com/security/data/fix/linux/ubuntu-focal-libpostproc55-7-4.2.7-0ubuntu0.1.md) | Aug 11, 2023 | Ubuntu 20.04 LTS (focal) 7:4.2.7-0ubuntu0.1 | Routine | 36 | 0 |
| [libpostproc55 7:4.2.7-0ubuntu0.1+esm3](https://patchblox.com/security/data/fix/linux/ubuntu-focal-libpostproc55-7-4.2.7-0ubuntu0.1-esm3.md) | Mar 29, 2023 | Ubuntu 20.04 LTS (focal) 7:4.2.7-0ubuntu0.1+esm3 | High | 8 | 0 |
| [libpostproc55 7:4.4.2-0ubuntu0.22.04.1+esm2](https://patchblox.com/security/data/fix/linux/ubuntu-jammy-libpostproc55-7-4.4.2-0ubuntu0.22.04.1-esm2.md) | Mar 29, 2023 | Ubuntu 22.04.1 LTS (jammy) 7:4.4.2-0ubuntu0.22.04.1+esm2 | High | 1 | 0 |
| [libpostproc55 7:4.4.2-0ubuntu0.22.04.1+esm1](https://patchblox.com/security/data/fix/linux/ubuntu-jammy-libpostproc55-7-4.4.2-0ubuntu0.22.04.1-esm1.md) | Jan 12, 2023 | Ubuntu 22.04.1 LTS (jammy) 7:4.4.2-0ubuntu0.22.04.1+esm1 | High | 3 | 0 |
| [libpostproc55 7:4.2.7-0ubuntu0.1+esm1](https://patchblox.com/security/data/fix/linux/ubuntu-focal-libpostproc55-7-4.2.7-0ubuntu0.1-esm1.md) | Jan 12, 2023 | Ubuntu 20.04 LTS (focal) 7:4.2.7-0ubuntu0.1+esm1 | High | 2 | 0 |
| [libpostproc55 7:4.4.2-0ubuntu0.22.04.1](https://patchblox.com/security/data/fix/linux/ubuntu-jammy-libpostproc55-7-4.4.2-0ubuntu0.22.04.1.md) | May 2, 2022 | Ubuntu 22.04.1 LTS (jammy) 7:4.4.2-0ubuntu0.22.04.1 | Routine | 1 | 0 |
| [libpostproc55 7:4.2.4-1ubuntu0.1](https://patchblox.com/security/data/fix/linux/ubuntu-focal-libpostproc55-7-4.2.4-1ubuntu0.1.md) | Jun 2, 2021 | Ubuntu 20.04 LTS (focal) 7:4.2.4-1ubuntu0.1 | Routine | 7 | 0 |
| [libpostproc55 7:4.2.7-0ubuntu0.1+esm2](https://patchblox.com/security/data/fix/linux/ubuntu-focal-libpostproc55-7-4.2.7-0ubuntu0.1-esm2.md) | Jun 2, 2021 | Ubuntu 20.04 LTS (focal) 7:4.2.7-0ubuntu0.1+esm2 | Routine | 5 | 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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