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.
Affected products
Version statuses are supplied by the assigning organization. Consult the original record for detailed ranges and platform conditions.
AcademySoftwareFoundation openexr
>= 3.2.0, < 3.2.7affected>= 3.3.0, < 3.3.9affected>= 3.4.0, < 3.4.9affected
References
- https://github.com/AcademySoftwareFoundation/openexr/security/advisories/GHSA-p8xc-w3q4-h64x ↗
- https://github.com/AcademySoftwareFoundation/openexr/releases/tag/v3.2.7 ↗
- https://github.com/AcademySoftwareFoundation/openexr/releases/tag/v3.3.9 ↗
- https://github.com/AcademySoftwareFoundation/openexr/releases/tag/v3.4.9 ↗
- https://access.redhat.com/security/cve/CVE-2026-34589 ↗
- https://bugzilla.redhat.com/show_bug.cgi?id=2455411 ↗
- https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-34589.json ↗