CVE-2026-27622

Summary

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.

Affected Software

VendorProductVersion RangeStatus
AcademySoftwareFoundationopenexr>= 2.3.0, < 3.2.6affected
AcademySoftwareFoundationopenexr>= 3.3.0, < 3.3.8affected
AcademySoftwareFoundationopenexr>= 3.4.0, < 3.4.6affected

Weaknesses

  • CWE-787: CWE-787: Out-of-bounds Write

ADP Enrichment

CISA ADP Vulnrichment

  • SSVC:
  • Exploitation: none
    • Automatable: no
    • Technical Impact: total

openexr: OpenEXR: Arbitrary code execution via integer overflow in EXR file processing

Additional References

References