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.

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Advisories
Source ID Title
Github GHSA Github GHSA GHSA-cr4v-6jm6-4963 OpenEXR's CompositeDeepScanLine integer-overflow leads to heap OOB write
Fixes

Solution

No solution given by the vendor.


Workaround

No workaround given by the vendor.

History

Thu, 05 Mar 2026 21:15:00 +0000

Type Values Removed Values Added
First Time appeared Openexr
Openexr openexr
CPEs cpe:2.3:a:openexr:openexr:*:*:*:*:*:*:*:*
Vendors & Products Openexr
Openexr openexr
Metrics cvssV3_1

{'score': 7.4, 'vector': 'CVSS:3.1/AV:L/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H'}

cvssV3_1

{'score': 7.8, 'vector': 'CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H'}


Thu, 05 Mar 2026 00:15:00 +0000

Type Values Removed Values Added
Weaknesses CWE-190
References
Metrics threat_severity

None

cvssV3_1

{'score': 7.4, 'vector': 'CVSS:3.1/AV:L/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H'}

threat_severity

Important


Wed, 04 Mar 2026 16:15:00 +0000

Type Values Removed Values Added
Metrics ssvc

{'options': {'Automatable': 'no', 'Exploitation': 'none', 'Technical Impact': 'total'}, 'version': '2.0.3'}


Wed, 04 Mar 2026 15:00:00 +0000

Type Values Removed Values Added
First Time appeared Academysoftwarefoundation
Academysoftwarefoundation openexr
Vendors & Products Academysoftwarefoundation
Academysoftwarefoundation openexr

Tue, 03 Mar 2026 22:45:00 +0000

Type Values Removed Values Added
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.
Title OpenEXR CompositeDeepScanLine integer-overflow leads to heap OOB write
Weaknesses CWE-787
References
Metrics cvssV4_0

{'score': 8.4, 'vector': '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'}


Projects

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cve-icon MITRE

Status: PUBLISHED

Assigner: GitHub_M

Published:

Updated: 2026-03-11T03:56:39.168Z

Reserved: 2026-02-20T22:02:30.027Z

Link: CVE-2026-27622

cve-icon Vulnrichment

Updated: 2026-03-04T16:08:09.596Z

cve-icon NVD

Status : Analyzed

Published: 2026-03-03T23:15:55.737

Modified: 2026-03-05T21:07:05.753

Link: CVE-2026-27622

cve-icon Redhat

Severity : Important

Publid Date: 2026-03-03T22:42:49Z

Links: CVE-2026-27622 - Bugzilla

cve-icon OpenCVE Enrichment

Updated: 2026-03-04T14:53:31Z

Weaknesses