# CVE-2021-28678: python3-pil: An issue was discovered in Pillow before 8.2.0

CVE-2021-28678 is fixed in 6 products on 1 platform, first by python-pil 5.1.0-1ubuntu0.6, released May 9, 2021. It is not reported as exploited. Patch Radar priority: High.

- Web page: https://patchblox.com/security/cve/CVE-2021-28678
- Priority: High
- CVSS: 9.1 (Low)
- EPSS: 0.0073
- CISA KEV: not listed
- Exploited (vendor report): no
- Publicly disclosed: no
- Published: May 9, 2021

## Description

An issue was discovered in Pillow before 8.2.0. For BLP data,BlpImagePlugin did not properly check that reads (after jumping to fileoffsets) returned data. This could lead to a DoS where the decoder could berun a large number of times on empty data.

## Where it's fixed

| Platform | Product | Fixed in | Fix | Released |
|---|---|---|---|---|
| Linux | python-pil Ubuntu 18.04.6 LTS (bionic) | 5.1.0-1ubuntu0.6 | [python-pil 5.1.0-1ubuntu0.6](https://patchblox.com/security/data/fix/linux/ubuntu-bionic-python-pil-5.1.0-1ubuntu0.6.md) | May 9, 2021 |
| Linux | python-pil.imagetk Ubuntu 18.04.6 LTS (bionic) | 5.1.0-1ubuntu0.6 | [python-pil.imagetk 5.1.0-1ubuntu0.6](https://patchblox.com/security/data/fix/linux/ubuntu-bionic-python-pil.imagetk-5.1.0-1ubuntu0.6.md) | May 9, 2021 |
| Linux | python-pillow rocky 8 | 0:5.1.1-16.el8 | [RLSA-2021:4149](https://patchblox.com/security/data/fix/linux/rlsa-2021-4149.md) | Nov 9, 2021 |
| Linux | python3-pil Ubuntu 18.04.6 LTS (bionic) | 5.1.0-1ubuntu0.6 | [python3-pil 5.1.0-1ubuntu0.6](https://patchblox.com/security/data/fix/linux/ubuntu-bionic-python3-pil-5.1.0-1ubuntu0.6.md) | May 9, 2021 |
| Linux | python3-pil Ubuntu 20.04 LTS (focal) | 7.0.0-4ubuntu0.4 | [python3-pil 7.0.0-4ubuntu0.4](https://patchblox.com/security/data/fix/linux/ubuntu-focal-python3-pil-7.0.0-4ubuntu0.4.md) | May 9, 2021 |
| Linux | python3-pil Ubuntu 24.10 (oracular) | 8.1.2+dfsg-0.1ubuntu1 | [python3-pil 8.1.2+dfsg-0.1ubuntu1](https://patchblox.com/security/data/fix/linux/ubuntu-oracular-python3-pil-8.1.2-dfsg-0.1ubuntu1.md) | Jan 16, 2026 |
| Linux | python3-pil Ubuntu 25.04 (plucky) | 8.1.2+dfsg-0.1ubuntu1 | [python3-pil 8.1.2+dfsg-0.1ubuntu1](https://patchblox.com/security/data/fix/linux/ubuntu-plucky-python3-pil-8.1.2-dfsg-0.1ubuntu1.md) | Jan 16, 2026 |
| Linux | python3-pil.imagetk Ubuntu 18.04.6 LTS (bionic) | 5.1.0-1ubuntu0.6 | [python3-pil.imagetk 5.1.0-1ubuntu0.6](https://patchblox.com/security/data/fix/linux/ubuntu-bionic-python3-pil.imagetk-5.1.0-1ubuntu0.6.md) | May 9, 2021 |
| Linux | python3-pil.imagetk Ubuntu 20.04 LTS (focal) | 7.0.0-4ubuntu0.4 | [python3-pil.imagetk 7.0.0-4ubuntu0.4](https://patchblox.com/security/data/fix/linux/ubuntu-focal-python3-pil.imagetk-7.0.0-4ubuntu0.4.md) | May 9, 2021 |
| Linux | python3-pil.imagetk Ubuntu 24.10 (oracular) | 8.1.2+dfsg-0.1ubuntu1 | [python3-pil.imagetk 8.1.2+dfsg-0.1ubuntu1](https://patchblox.com/security/data/fix/linux/ubuntu-oracular-python3-pil.imagetk-8.1.2-dfsg-0.1ubuntu1.md) | Jan 16, 2026 |
| Linux | python3-pil.imagetk Ubuntu 25.04 (plucky) | 8.1.2+dfsg-0.1ubuntu1 | [python3-pil.imagetk 8.1.2+dfsg-0.1ubuntu1](https://patchblox.com/security/data/fix/linux/ubuntu-plucky-python3-pil.imagetk-8.1.2-dfsg-0.1ubuntu1.md) | Jan 16, 2026 |
| Linux | python3-pillow RHEL 8 | 0:5.1.1-16.el8 | [RHSA-2021:4149](https://patchblox.com/security/data/fix/linux/rhsa-2021-4149.md) | Nov 9, 2021 |
| Linux | python3-pillow almalinux 8 | 5.1.1-16.el8 | [ALSA-2021:4149](https://patchblox.com/security/data/fix/linux/alsa-2021-4149.md) | Nov 9, 2021 |

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Data as of 2026-11-08T00:53:09Z 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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