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

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

https://cvefeed.io/rssfeed/latest.atom / Wed, 03/04/2026 - 02:05
CVE ID : CVE-2026-27622
Published : March 3, 2026, 11:15 p.m. | 40 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
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