# CVE-2026-43907: openimageio: OpenImageIO is a toolset for reading, writing, and manipulating image files of any image file format relevant to VFX...

CVE-2026-43907 is fixed in 8 products on 1 platform, first by libopenimageio1.7 1.7.17~dfsg0-1ubuntu2+esm1, released May 14, 2026. It is not reported as exploited. Patch Radar priority: High.

- Web page: https://patchblox.com/security/cve/CVE-2026-43907
- Priority: High
- CVSS: 8.3 (high)
- EPSS: 0.0037
- CISA KEV: not listed
- Exploited (vendor report): no
- Publicly disclosed: no
- Published: May 14, 2026

## Description

OpenImageIO is a toolset for reading, writing, and manipulating image files of any image file format relevant to VFX / animation. Prior to 3.0.18.0 and 3.1.13.0, a signed integer overflow in QueryRGBBufferSizeInternal() in DPXColorConverter.cpp leads to a heap-based out-of-bounds write when processing crafted DPX image files. The function computes buffer sizes using 32-bit signed integer arithmetic with negative multipliers (e.g., pixels * -3 * bytes for kCbYCr descriptors and pixels * -4 * bytes for kABGR descriptors), where a negative result is used as an in-band signal that no separate buffer is needed. When the pixel count is sufficiently large, the multiplication overflows INT_MIN and wraps to a small positive value. The caller in dpxinput.cpp interprets this positive value as a required buffer size, allocates an undersized heap buffer via m_decodebuf.resize(), and then writes the full image data into it via fread, resulting in a heap buffer overflow. An attacker can exploit this by crafting a DPX file that triggers the overflow, causing a denial of service (crash) or potentially arbitrary code execution through heap corruption in any application that reads pixel data using OpenImageIO. This vulnerability is fixed in 3.0.18.0 and 3.1.13.0.

## Where it's fixed

| Platform | Product | Fixed in | Fix | Released |
|---|---|---|---|---|
| Linux | libopenimageio1.7 Ubuntu 18.04.6 LTS (bionic) | 1.7.17~dfsg0-1ubuntu2+esm1 | [libopenimageio1.7 1.7.17~dfsg0-1ubuntu2+esm1](https://patchblox.com/security/data/fix/linux/ubuntu-bionic-libopenimageio1.7-1.7.17-dfsg0-1ubuntu2-esm1.md) | May 14, 2026 |
| Linux | libopenimageio2.1 Ubuntu 20.04 LTS (focal) | 2.1.12.0~dfsg0-1ubuntu0.1~esm1 | [libopenimageio2.1 2.1.12.0~dfsg0-1ubuntu0.1~esm1](https://patchblox.com/security/data/fix/linux/ubuntu-focal-libopenimageio2.1-2.1.12.0-dfsg0-1ubuntu0.1-esm1.md) | May 14, 2026 |
| Linux | libopenimageio2.4t64 Ubuntu 24.04.5 LTS (noble) | 2.4.17.0+dfsg-1.1ubuntu0.1~esm1 | [libopenimageio2.4t64 2.4.17.0+dfsg-1.1ubuntu0.1~esm1](https://patchblox.com/security/data/fix/linux/ubuntu-noble-libopenimageio2.4t64-2.4.17.0-dfsg-1.1ubuntu0.1-esm1.md) | May 14, 2026 |
| Linux | libopenimageio2.5 Ubuntu 26.04.1 LTS (resolute) | 2.5.19.1+dfsg-2ubuntu0.1~esm1 | [libopenimageio2.5 2.5.19.1+dfsg-2ubuntu0.1~esm1](https://patchblox.com/security/data/fix/linux/ubuntu-resolute-libopenimageio2.5-2.5.19.1-dfsg-2ubuntu0.1-esm1.md) | May 14, 2026 |
| Linux | openimageio Debian 14 | 3.1.18.0+dfsg-2 | [DEBIAN-CVE-2026-43907](https://patchblox.com/security/data/fix/linux/debian-cve-2026-43907.md) | May 14, 2026 |
| Linux | openimageio-tools Ubuntu 18.04.6 LTS (bionic) | 1.7.17~dfsg0-1ubuntu2+esm1 | [openimageio-tools 1.7.17~dfsg0-1ubuntu2+esm1](https://patchblox.com/security/data/fix/linux/ubuntu-bionic-openimageio-tools-1.7.17-dfsg0-1ubuntu2-esm1.md) | May 14, 2026 |
| Linux | openimageio-tools Ubuntu 20.04 LTS (focal) | 2.1.12.0~dfsg0-1ubuntu0.1~esm1 | [openimageio-tools 2.1.12.0~dfsg0-1ubuntu0.1~esm1](https://patchblox.com/security/data/fix/linux/ubuntu-focal-openimageio-tools-2.1.12.0-dfsg0-1ubuntu0.1-esm1.md) | May 14, 2026 |
| Linux | openimageio-tools Ubuntu 24.04.5 LTS (noble) | 2.4.17.0+dfsg-1.1ubuntu0.1~esm1 | [openimageio-tools 2.4.17.0+dfsg-1.1ubuntu0.1~esm1](https://patchblox.com/security/data/fix/linux/ubuntu-noble-openimageio-tools-2.4.17.0-dfsg-1.1ubuntu0.1-esm1.md) | May 14, 2026 |
| Linux | openimageio-tools Ubuntu 26.04.1 LTS (resolute) | 2.5.19.1+dfsg-2ubuntu0.1~esm1 | [openimageio-tools 2.5.19.1+dfsg-2ubuntu0.1~esm1](https://patchblox.com/security/data/fix/linux/ubuntu-resolute-openimageio-tools-2.5.19.1-dfsg-2ubuntu0.1-esm1.md) | May 14, 2026 |
| Linux | python-openimageio Ubuntu 18.04.6 LTS (bionic) | 1.7.17~dfsg0-1ubuntu2+esm1 | [python-openimageio 1.7.17~dfsg0-1ubuntu2+esm1](https://patchblox.com/security/data/fix/linux/ubuntu-bionic-python-openimageio-1.7.17-dfsg0-1ubuntu2-esm1.md) | May 14, 2026 |
| Linux | python3-openimageio Ubuntu 20.04 LTS (focal) | 2.1.12.0~dfsg0-1ubuntu0.1~esm1 | [python3-openimageio 2.1.12.0~dfsg0-1ubuntu0.1~esm1](https://patchblox.com/security/data/fix/linux/ubuntu-focal-python3-openimageio-2.1.12.0-dfsg0-1ubuntu0.1-esm1.md) | May 14, 2026 |
| Linux | python3-openimageio Ubuntu 24.04.5 LTS (noble) | 2.4.17.0+dfsg-1.1ubuntu0.1~esm1 | [python3-openimageio 2.4.17.0+dfsg-1.1ubuntu0.1~esm1](https://patchblox.com/security/data/fix/linux/ubuntu-noble-python3-openimageio-2.4.17.0-dfsg-1.1ubuntu0.1-esm1.md) | May 14, 2026 |
| Linux | python3-openimageio Ubuntu 26.04.1 LTS (resolute) | 2.5.19.1+dfsg-2ubuntu0.1~esm1 | [python3-openimageio 2.5.19.1+dfsg-2ubuntu0.1~esm1](https://patchblox.com/security/data/fix/linux/ubuntu-resolute-python3-openimageio-2.5.19.1-dfsg-2ubuntu0.1-esm1.md) | May 14, 2026 |

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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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