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.
Fix
Patch, vendor advisory and mitigation references on NVD 1
- https://github.com/AcademySoftwareFoundation/openexr/security/advisories/GHSA-p8xc-w3q4-h64x Exploit, Vendor Advisory
Every line above is quoted from NVD, CISA, Microsoft, the vendor's own advisory or DISA; nothing is generated.
Change history 1
- First seenCVSS 8.4 · openexrNVD modified 2026-10-26 22:10
Affected (CPE criteria) 1
cpe:2.3:a:openexr:openexr:*:*:*:*:*:*:*:*
References 7
- https://github.com/AcademySoftwareFoundation/openexr/releases/tag/v3.2.7 Product, Release Notes
- https://github.com/AcademySoftwareFoundation/openexr/releases/tag/v3.3.9 Product, Release Notes
- https://github.com/AcademySoftwareFoundation/openexr/releases/tag/v3.4.9 Product, Release Notes
- https://github.com/AcademySoftwareFoundation/openexr/security/advisories/GHSA-p8xc-w3q4-h64x Exploit, Vendor Advisory
- 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