# CVE-2021-3941: openexr: In ImfChromaticities.cpp routine RGBtoXYZ(), there are some division operations such as `float Z = (1 - chroma.white....

CVE-2021-3941 is fixed in 9 products on 1 platform, first by libopenexr22 2.2.0-11.1ubuntu1.9, released November 10, 2021. It is not reported as exploited. Patch Radar priority: Routine.

- Web page: https://patchblox.com/security/cve/CVE-2021-3941
- Priority: Routine
- CVSS: 6.5 (medium)
- EPSS: 0.0030
- CISA KEV: not listed
- Exploited (vendor report): no
- Publicly disclosed: no
- Published: Nov 10, 2021

## Description

In ImfChromaticities.cpp routine RGBtoXYZ(), there are some division operations such as `float Z = (1 - chroma.white.x - chroma.white.y) * Y / chroma.white.y;` and `chroma.green.y * (X + Z))) / d;` but the divisor is not checked for a 0 value. A specially crafted file could trigger a divide-by-zero condition which could affect the availability of programs linked with OpenEXR.

## Where it's fixed

| Platform | Product | Fixed in | Fix | Released |
|---|---|---|---|---|
| Linux | libopenexr22 Ubuntu 18.04.6 LTS (bionic) | 2.2.0-11.1ubuntu1.9 | [libopenexr22 2.2.0-11.1ubuntu1.9](https://patchblox.com/security/data/fix/linux/ubuntu-bionic-libopenexr22-2.2.0-11.1ubuntu1.9.md) | Nov 10, 2021 |
| Linux | libopenexr24 Ubuntu 20.04 LTS (focal) | 2.3.0-6ubuntu0.5+esm1 | [libopenexr24 2.3.0-6ubuntu0.5+esm1](https://patchblox.com/security/data/fix/linux/ubuntu-focal-libopenexr24-2.3.0-6ubuntu0.5-esm1.md) | Nov 10, 2021 |
| Linux | libopenexr25 Ubuntu 22.04.1 LTS (jammy) | 2.5.7-1ubuntu0.1~esm1 | [libopenexr25 2.5.7-1ubuntu0.1~esm1](https://patchblox.com/security/data/fix/linux/ubuntu-jammy-libopenexr25-2.5.7-1ubuntu0.1-esm1.md) | Nov 10, 2021 |
| Linux | openexr Debian 12.15 (bookworm) | 3.1.5-2 | [DEBIAN-CVE-2021-3941](https://patchblox.com/security/data/fix/linux/debian-cve-2021-3941.md) | Mar 25, 2022 |
| Linux | openexr Debian 13.5 (trixie) | 3.1.5-2 | [DEBIAN-CVE-2021-3941](https://patchblox.com/security/data/fix/linux/debian-cve-2021-3941.md) | Mar 25, 2022 |
| Linux | openexr Debian 14 | 3.1.5-2 | [DEBIAN-CVE-2021-3941](https://patchblox.com/security/data/fix/linux/debian-cve-2021-3941.md) | Mar 25, 2022 |
| Linux | openexr Ubuntu 18.04.6 LTS (bionic) | 2.2.0-11.1ubuntu1.9 | [openexr 2.2.0-11.1ubuntu1.9](https://patchblox.com/security/data/fix/linux/ubuntu-bionic-openexr-2.2.0-11.1ubuntu1.9.md) | Nov 10, 2021 |
| Linux | openexr Ubuntu 20.04 LTS (focal) | 2.3.0-6ubuntu0.5+esm1 | [openexr 2.3.0-6ubuntu0.5+esm1](https://patchblox.com/security/data/fix/linux/ubuntu-focal-openexr-2.3.0-6ubuntu0.5-esm1.md) | Nov 10, 2021 |
| Linux | openexr Ubuntu 22.04.1 LTS (jammy) | 2.5.7-1ubuntu0.1~esm1 | [openexr 2.5.7-1ubuntu0.1~esm1](https://patchblox.com/security/data/fix/linux/ubuntu-jammy-openexr-2.5.7-1ubuntu0.1-esm1.md) | Nov 10, 2021 |
| Linux | openexr amzn 2023 | 3.1.5-1.amzn2023.0.3 | [ALAS2023-2023-022](https://patchblox.com/security/data/fix/linux/alas2023-2023-022.md) | Feb 17, 2023 |
| Linux | openexr-debuginfo amzn 2023 | 3.1.5-1.amzn2023.0.3 | [ALAS2023-2023-022](https://patchblox.com/security/data/fix/linux/alas2023-2023-022.md) | Feb 17, 2023 |
| Linux | openexr-debugsource amzn 2023 | 3.1.5-1.amzn2023.0.3 | [ALAS2023-2023-022](https://patchblox.com/security/data/fix/linux/alas2023-2023-022.md) | Feb 17, 2023 |
| Linux | openexr-devel amzn 2023 | 3.1.5-1.amzn2023.0.3 | [ALAS2023-2023-022](https://patchblox.com/security/data/fix/linux/alas2023-2023-022.md) | Feb 17, 2023 |
| Linux | openexr-libs amzn 2023 | 3.1.5-1.amzn2023.0.3 | [ALAS2023-2023-022](https://patchblox.com/security/data/fix/linux/alas2023-2023-022.md) | Feb 17, 2023 |
| Linux | openexr-libs-debuginfo amzn 2023 | 3.1.5-1.amzn2023.0.3 | [ALAS2023-2023-022](https://patchblox.com/security/data/fix/linux/alas2023-2023-022.md) | Feb 17, 2023 |

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Data as of 2026-11-08T06:59:42Z 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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