# CVE-2026-59186: openexr: OpenEXR is the reference implementation and specification for the EXR image format, widely used in the motion picture...

CVE-2026-59186 is fixed in 4 products on 1 platform, first by DEBIAN-CVE-2026-59186, released August 28, 2026. It is not reported as exploited. Patch Radar priority: High.

- Web page: https://patchblox.com/security/cve/CVE-2026-59186
- Priority: High
- CVSS: 7.1 (high)
- EPSS: 0.0027
- CISA KEV: not listed
- Exploited (vendor report): no
- Publicly disclosed: no
- Published: Aug 25, 2026

## Description

OpenEXR is the reference implementation and specification for the EXR image format, widely used in the motion picture industry. In versions before 3.2.11, 3.3.0 through 3.3.12, and 3.4.0 through 3.4.13, a crafted tiled EXR can trigger a heap out-of-bounds write on 32-bit/ILP32 builds when read through the public TiledRgbaInputFile RGBA API. The file uses a small 40x40 dataWindow but a 65537x65537 tile size. On ILP32, the Array2D<Rgba> tile-conversion buffer size calculation overflows, allocates a much smaller heap buffer, and tile decode writes past that allocation. This issue is fixed in versions 3.2.11, 3.3.13, and 3.4.14.

## Where it's fixed

| Platform | Product | Fixed in | Fix | Released |
|---|---|---|---|---|
| Linux | OpenEXR rocky 8 | 0:2.2.0-12.el8_10.3 | [RLSA-2026:82345](https://patchblox.com/security/data/fix/linux/rlsa-2026-82345.md) | Nov 7, 2026 |
| Linux | OpenEXR-devel RHEL 8 | 0:2.2.0-12.el8_10.3 | [RHSA-2026:82345](https://patchblox.com/security/data/fix/linux/rhsa-2026-82345.md) | Oct 16, 2026 |
| Linux | OpenEXR-devel almalinux 8 | 2.2.0-12.el8_10.3 | [ALSA-2026:82345](https://patchblox.com/security/data/fix/linux/alsa-2026-82345.md) | Nov 7, 2026 |
| Linux | OpenEXR-devel ol 8 | 0:2.2.0-12.el8_10.3 | [ELSA-2026-82345](https://patchblox.com/security/data/fix/linux/elsa-2026-82345.md) | Nov 7, 2026 |
| Linux | OpenEXR-libs RHEL 8 | 0:2.2.0-12.el8_10.3 | [RHSA-2026:82345](https://patchblox.com/security/data/fix/linux/rhsa-2026-82345.md) | Oct 16, 2026 |
| Linux | OpenEXR-libs almalinux 8 | 2.2.0-12.el8_10.3 | [ALSA-2026:82345](https://patchblox.com/security/data/fix/linux/alsa-2026-82345.md) | Nov 7, 2026 |
| Linux | OpenEXR-libs ol 8 | 0:2.2.0-12.el8_10.3 | [ELSA-2026-82345](https://patchblox.com/security/data/fix/linux/elsa-2026-82345.md) | Nov 7, 2026 |
| Linux | openexr Debian 14 | 3.4.14-0.1 | [DEBIAN-CVE-2026-59186](https://patchblox.com/security/data/fix/linux/debian-cve-2026-59186.md) | Aug 28, 2026 |
| Linux | openexr opensuse-leap 16.0 | 3.2.2-160000.10.1 | [OPENSUSE-SU-2026:21737-1](https://patchblox.com/security/data/fix/linux/opensuse-su-2026-21737-1.md) | Sep 2, 2026 |
| Linux | openexr sles 15.6 | 2.2.1-150000.3.55.1 | [SUSE-SU-2026:4003-1](https://patchblox.com/security/data/fix/linux/suse-su-2026-4003-1.md) | Sep 7, 2026 |
| Linux | openexr sles 15.7 | 2.2.1-150000.3.55.1 | [SUSE-SU-2026:4003-1](https://patchblox.com/security/data/fix/linux/suse-su-2026-4003-1.md) | Sep 7, 2026 |
| Linux | openexr sles 16.0 | 3.2.2-160000.10.1 | [SUSE-SU-2026:23604-1](https://patchblox.com/security/data/fix/linux/suse-su-2026-23604-1.md) | Sep 2, 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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