# CVE-2026-42310: pillow: Pillow is a Python imaging library

CVE-2026-42310 is fixed in 10 products on 1 platform, first by python3-pil 9.0.1-1ubuntu0.4, released May 8, 2026. It is not reported as exploited. Patch Radar priority: Routine.

- Web page: https://patchblox.com/security/cve/CVE-2026-42310
- Priority: Routine
- CVSS: 5.5 (medium)
- EPSS: 0.0017
- CISA KEV: not listed
- Exploited (vendor report): no
- Publicly disclosed: no
- Published: May 8, 2026

## Description

Pillow is a Python imaging library. From version 4.2.0 to before version 12.2.0, an attacker can supply a malicious PDF that causes the process to hang indefinitely, consuming 100% CPU and making the application unresponsive. This issue has been patched in version 12.2.0.

## Where it's fixed

| Platform | Product | Fixed in | Fix | Released |
|---|---|---|---|---|
| Linux | pillow Debian 13.5 (trixie) | 11.1.0-5+deb13u3 | [DEBIAN-CVE-2026-42310](https://patchblox.com/security/data/fix/linux/debian-cve-2026-42310.md) | May 15, 2026 |
| Linux | pillow Debian 14 | 12.2.0-1 | [DEBIAN-CVE-2026-42310](https://patchblox.com/security/data/fix/linux/debian-cve-2026-42310.md) | May 15, 2026 |
| Linux | python-pillow-debuginfo amzn 2023 | 9.4.0-2.amzn2023.0.8 | [ALAS2023-2026-1712](https://patchblox.com/security/data/fix/linux/alas2023-2026-1712.md) | May 25, 2026 |
| Linux | python-pillow-debugsource amzn 2023 | 9.4.0-2.amzn2023.0.8 | [ALAS2023-2026-1712](https://patchblox.com/security/data/fix/linux/alas2023-2026-1712.md) | May 25, 2026 |
| Linux | python3-pil Ubuntu 22.04.1 LTS (jammy) | 9.0.1-1ubuntu0.4 | [python3-pil 9.0.1-1ubuntu0.4](https://patchblox.com/security/data/fix/linux/ubuntu-jammy-python3-pil-9.0.1-1ubuntu0.4.md) | May 8, 2026 |
| Linux | python3-pil Ubuntu 24.04.5 LTS (noble) | 10.2.0-1ubuntu1.2 | [python3-pil 10.2.0-1ubuntu1.2](https://patchblox.com/security/data/fix/linux/ubuntu-noble-python3-pil-10.2.0-1ubuntu1.2.md) | May 8, 2026 |
| Linux | python3-pil Ubuntu 25.10 (questing) | 11.3.0-1ubuntu1.3 | [python3-pil 11.3.0-1ubuntu1.3](https://patchblox.com/security/data/fix/linux/ubuntu-questing-python3-pil-11.3.0-1ubuntu1.3.md) | May 8, 2026 |
| Linux | python3-pil Ubuntu 26.04.1 LTS (resolute) | 12.1.1-2ubuntu1.2 | [python3-pil 12.1.1-2ubuntu1.2](https://patchblox.com/security/data/fix/linux/ubuntu-resolute-python3-pil-12.1.1-2ubuntu1.2.md) | May 8, 2026 |
| Linux | python3-pil.imagetk Ubuntu 22.04.1 LTS (jammy) | 9.0.1-1ubuntu0.4 | [python3-pil.imagetk 9.0.1-1ubuntu0.4](https://patchblox.com/security/data/fix/linux/ubuntu-jammy-python3-pil.imagetk-9.0.1-1ubuntu0.4.md) | May 8, 2026 |
| Linux | python3-pil.imagetk Ubuntu 24.04.5 LTS (noble) | 10.2.0-1ubuntu1.2 | [python3-pil.imagetk 10.2.0-1ubuntu1.2](https://patchblox.com/security/data/fix/linux/ubuntu-noble-python3-pil.imagetk-10.2.0-1ubuntu1.2.md) | May 8, 2026 |
| Linux | python3-pil.imagetk Ubuntu 25.10 (questing) | 11.3.0-1ubuntu1.3 | [python3-pil.imagetk 11.3.0-1ubuntu1.3](https://patchblox.com/security/data/fix/linux/ubuntu-questing-python3-pil.imagetk-11.3.0-1ubuntu1.3.md) | May 8, 2026 |
| Linux | python3-pil.imagetk Ubuntu 26.04.1 LTS (resolute) | 12.1.1-2ubuntu1.2 | [python3-pil.imagetk 12.1.1-2ubuntu1.2](https://patchblox.com/security/data/fix/linux/ubuntu-resolute-python3-pil.imagetk-12.1.1-2ubuntu1.2.md) | May 8, 2026 |
| Linux | python3-pillow amzn 2023 | 9.4.0-2.amzn2023.0.8 | [ALAS2023-2026-1712](https://patchblox.com/security/data/fix/linux/alas2023-2026-1712.md) | May 25, 2026 |
| Linux | python3-pillow-debuginfo amzn 2023 | 9.4.0-2.amzn2023.0.8 | [ALAS2023-2026-1712](https://patchblox.com/security/data/fix/linux/alas2023-2026-1712.md) | May 25, 2026 |
| Linux | python3-pillow-devel amzn 2023 | 9.4.0-2.amzn2023.0.8 | [ALAS2023-2026-1712](https://patchblox.com/security/data/fix/linux/alas2023-2026-1712.md) | May 25, 2026 |
| Linux | python3-pillow-tk amzn 2023 | 9.4.0-2.amzn2023.0.8 | [ALAS2023-2026-1712](https://patchblox.com/security/data/fix/linux/alas2023-2026-1712.md) | May 25, 2026 |
| Linux | python3-pillow-tk-debuginfo amzn 2023 | 9.4.0-2.amzn2023.0.8 | [ALAS2023-2026-1712](https://patchblox.com/security/data/fix/linux/alas2023-2026-1712.md) | May 25, 2026 |

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Data as of 2026-11-08T19:12:23Z 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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