Description

OpenEXR provides the specification and reference implementation of the EXR file format, an image storage format for the motion picture industry. From 3.4.0 to before 3.4.9, a missing bounds check on the dataWindow attribute in EXR file headers allows an attacker to trigger a signed integer overflow in generic_unpack(). By setting dataWindow.min.x to a large negative value, OpenEXRCore computes an enormous image width, which is later used in a signed integer multiplication that overflows, causing the process to terminate with SIGILL via UBSan. This vulnerability is fixed in 3.4.9.

INFO

Published Date :

2026-04-06T15:19:34.871Z

Last Modified :

2026-04-07T03:07:17.341Z

Source :

GitHub_M
AFFECTED PRODUCTS

The following products are affected by CVE-2026-34378 vulnerability.

Vendors Products
Academysoftwarefoundation
  • Openexr
Openexr
  • Openexr
REFERENCES

Here, you will find a curated list of external links that provide in-depth information to CVE-2026-34378.

URL Resource
https://github.com/AcademySoftwareFoundation/openexr/releases/tag/v3.4.9 cve-icon cve-icon
https://github.com/AcademySoftwareFoundation/openexr/security/advisories/GHSA-v76p-4qvv-vh4g cve-icon cve-icon cve-icon
https://nvd.nist.gov/vuln/detail/CVE-2026-34378 cve-icon
https://www.cve.org/CVERecord?id=CVE-2026-34378 cve-icon
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