CVE-2026-27622
Severity CVSS v4.0:
HIGH
Type:
CWE-787
Out-of-bounds Write
Publication date:
03/03/2026
Last modified:
03/03/2026
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.
Impact
Base Score 4.0
8.40
Severity 4.0
HIGH