CVE-2026-27622 - OpenEXR CompositeDeepScanLine integer-overflow leads to heap OOB write

CVE ID : CVE-2026-27622 Published : March 3, 2026, 11:15 p.m. | 1 hour, 5 minutes ago 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 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. Severity: 8.4 | HIGH Visit the link for more details, such as CVSS details, affected products, timeline, and more...