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Vulnerability details

CVE-2026-27622

AcademySoftwareFoundation openexr

OpenEXR CompositeDeepScanLine integer-overflow leads to heap OOB write

CVSS 4.0
8.4High

Official 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.

CVSS scores

ScoreVersionSourceVector
8.4High 4.0 CVEProject cvelistV5 (CNA) (GitHub_M) CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:A/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N
7.4High 3.1 CVEProject cvelistV5 (CNA) (redhat-SADP) CVSS:3.1/AV:L/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H

Affected products

VendorProductVersionsSource
AcademySoftwareFoundation openexr >= 2.3.0, < 3.2.6 CVEProject cvelistV5 (CNA)
AcademySoftwareFoundation openexr >= 3.3.0, < 3.3.8 CVEProject cvelistV5 (CNA)
AcademySoftwareFoundation openexr >= 3.4.0, < 3.4.6 CVEProject cvelistV5 (CNA)

References and advisories

20
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Details

Published
2026-03-04
Last updated
2026-09-09
State
Published
Assigner (CNA)
GitHub_M

Exploit prediction (EPSS)

0.24%
Probability of exploitation in 30 days
15.3%
Percentile (among all CVEs)

SSVC assessment (CISA)

Automatable
No
Exploitation
None
Technical impact
Total

Weaknesses (CWE)

  • CWE-787
    Out-of-bounds Write
  • CWE-190
    Integer Overflow or Wraparound