Critical Security Flaw in OpenEXR Package: Arbitrary Code Execution Risk

openexr Updated 17 Apr 2026

Summary

13/04/2026

Disclosed on

N/A

Severity

Yes i

Fix available

Unrated

Severity

Not published

CVSS Score

ALSA-2026:7682: Important: openexr security update. Affects openexr versions < 3.1.10-8.el10_1.1. Fixed in 3.1.10-8.el10_1.1. How to fix ↓

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Background

OpenEXR is an open-source high-dynamic-range floating-point image file format designed for high-quality image processing and storage. It is widely used in the visual effects and animation industries due to its ability to handle complex image data efficiently. The package includes binaries for OpenEXR, which are essential for applications that require advanced image processing capabilities. However, a recent vulnerability has been identified that poses a significant risk to users of this package.

Vulnerability Detail

The vulnerability arises from an integer overflow in the processing of EXR files, which can lead to arbitrary code execution. This means that an attacker could craft a malicious EXR file that, when processed by the OpenEXR library, could execute arbitrary code on the host system. This vulnerability is classified under CVE-2026-27622 and can have severe implications, including unauthorized access to system resources and data compromise.

How To Fix

Minimum fixed version

3.1.10-8.el10_1.1

This is the first release that contains the fix.

sudo dnf update openexr

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Workaround

As a temporary workaround, users are advised to avoid processing untrusted EXR files until the package has been updated to the fixed version. Additionally, implementing strict file validation and sanitization can help mitigate the risk.

Conclusion

The OpenEXR package has a critical vulnerability that can lead to arbitrary code execution through malicious EXR files. Users are strongly encouraged to update to the latest patched version to mitigate this risk. For those unable to update immediately, implementing workarounds and monitoring for vulnerabilities using tools like Vulert can provide additional protection.

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