# CVE-2026-34589: openexr: OpenEXR provides the specification and reference implementation of the EXR file format, an image storage format for t...

CVE-2026-34589 is fixed in openexr on 1 platform, first by DEBIAN-CVE-2026-34589, released April 6, 2026. It is not reported as exploited. Patch Radar priority: Routine.

- Web page: https://patchblox.com/security/cve/CVE-2026-34589
- Priority: Routine
- CVSS: 5.0 (medium)
- EPSS: 0.0043
- CISA KEV: not listed
- Exploited (vendor report): no
- Publicly disclosed: no
- Published: Apr 6, 2026

## Description

OpenEXR provides the specification and reference implementation of the EXR file format, an image storage format for the motion picture industry. From 3.2.0 to before 3.2.7, 3.3.9, and 3.4.9, the DWA lossy decoder constructs temporary per-component block pointers using signed 32-bit arithmetic. For a large enough width, the calculation overflows and later decoder stores operate on a wrapped pointer outside the allocated rowBlock backing store. This vulnerability is fixed in 3.2.7, 3.3.9, and 3.4.9.

## Where it's fixed

| Platform | Product | Fixed in | Fix | Released |
|---|---|---|---|---|
| Linux | openexr Debian 14 | 3.4.14-0.1 | [DEBIAN-CVE-2026-34589](https://patchblox.com/security/data/fix/linux/debian-cve-2026-34589.md) | Apr 6, 2026 |
| Linux | openexr opensuse-leap 16.0 | 3.2.2-160000.6.1 | [OPENSUSE-SU-2026:20605-1](https://patchblox.com/security/data/fix/linux/opensuse-su-2026-20605-1.md) | Apr 22, 2026 |

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Data as of 2026-11-08T13:06:02Z 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 Patchblox finds out-of-date software on Windows, macOS and Linux and updates it through release rings: https://patchblox.com/demo

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