# CVE-2021-20300: openexr: A flaw was found in OpenEXR's hufUncompress functionality in OpenEXR/IlmImf/ImfHuf.cpp

CVE-2021-20300 is fixed in openexr on 1 platform, first by DEBIAN-CVE-2021-20300, released March 4, 2022. It is not reported as exploited. Patch Radar priority: Routine.

- Web page: https://patchblox.com/security/cve/CVE-2021-20300
- Priority: Routine
- CVSS: 5.5 (medium)
- EPSS: 0.0089
- CISA KEV: not listed
- Exploited (vendor report): no
- Publicly disclosed: no
- Published: Mar 4, 2022

## Description

A flaw was found in OpenEXR's hufUncompress functionality in OpenEXR/IlmImf/ImfHuf.cpp. This flaw allows an attacker who can submit a crafted file that is processed by OpenEXR, to trigger an integer overflow. The highest threat from this vulnerability is to system availability.

## Where it's fixed

| Platform | Product | Fixed in | Fix | Released |
|---|---|---|---|---|
| Linux | openexr Debian 12.15 (bookworm) | 2.5.4-1 | [DEBIAN-CVE-2021-20300](https://patchblox.com/security/data/fix/linux/debian-cve-2021-20300.md) | Mar 4, 2022 |
| Linux | openexr Debian 13.5 (trixie) | 2.5.4-1 | [DEBIAN-CVE-2021-20300](https://patchblox.com/security/data/fix/linux/debian-cve-2021-20300.md) | Mar 4, 2022 |
| Linux | openexr Debian 14 | 2.5.4-1 | [DEBIAN-CVE-2021-20300](https://patchblox.com/security/data/fix/linux/debian-cve-2021-20300.md) | Mar 4, 2022 |

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Data as of 2026-11-09T07:25:28Z 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 Patchblox finds out-of-date software on Windows, macOS and Linux and updates it through release rings: https://patchblox.com/demo

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