Vulnerability Description
OpenEXR provides the specification and reference implementation of the EXR file format, an image storage format for the motion picture industry. In CompositeDeepScanLine::readPixels, per-pixel totals are accumulated in vector<unsigned int> total_sizes for attacker-controlled large counts across many parts, total_sizes[ptr] wraps modulo 2^32. overall_sample_count is then derived from wrapped totals and used in samples[channel].resize(overall_sample_count). Decode pointer setup/consumption proceeds with true sample counts, and write operations in core unpack (generic_unpack_deep_pointers) overrun the undersized composite sample buffer. This vulnerability is fixed in v3.2.6, v3.3.8, and v3.4.6.
CVSS Score
HIGH
Affected Products
| Vendor | Product | Versions |
|---|---|---|
| Openexr | Openexr | < 3.2.6 |
Related Weaknesses (CWE)
References
- https://github.com/AcademySoftwareFoundation/openexr/security/advisories/GHSA-crExploitVendor Advisory
FAQ
What is CVE-2026-27622?
CVE-2026-27622 is a vulnerability with a CVSS score of 7.8 (HIGH). OpenEXR provides the specification and reference implementation of the EXR file format, an image storage format for the motion picture industry. In CompositeDeepScanLine::readPixels, per-pixel totals ...
How severe is CVE-2026-27622?
CVE-2026-27622 has been rated HIGH with a CVSS base score of 7.8/10. Review the CVSS metrics above for detailed severity breakdown.
Is there a patch for CVE-2026-27622?
Check the references section above for vendor advisories and patch information. Affected products include: Openexr Openexr.