VULNERABILITY INTELLIGENCE

CVE-2026-27622

CVSS score7.8 HIGH
EPSS probability0.24%
CISA KEVNot currently listed
Published2026-03-03
Last modified2026-07-15
CVSS vectorCVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H

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.

Weakness classification

  • security-advisories@github.com: CWE-787
  • 0b0ca135-0b70-47e7-9f44-1890c2a1c46c: CWE-190

Primary references