{ "dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": { "cveId": "CVE-2026-27622", "assignerOrgId": "a0819718-46f1-4df5-94e2-005712e83aaa", "state": "PUBLISHED", "assignerShortName": "GitHub_M", "dateReserved": "2026-02-20T22:02:30.027Z", "datePublished": "2026-03-03T22:42:49.086Z", "dateUpdated": "2026-07-15T01:13:52.864Z" }, "containers": { "cna": { "title": "OpenEXR CompositeDeepScanLine integer-overflow leads to heap OOB write", "problemTypes": [ { "descriptions": [ { "cweId": "CWE-787", "lang": "en", "description": "CWE-787: Out-of-bounds Write", "type": "CWE" } ] } ], "metrics": [ { "cvssV4_0": { "attackVector": "LOCAL", "attackComplexity": "LOW", "attackRequirements": "NONE", "privilegesRequired": "NONE", "userInteraction": "ACTIVE", "vulnConfidentialityImpact": "HIGH", "vulnIntegrityImpact": "HIGH", "vulnAvailabilityImpact": "HIGH", "subConfidentialityImpact": "NONE", "subIntegrityImpact": "NONE", "subAvailabilityImpact": "NONE", "baseScore": 8.4, "baseSeverity": "HIGH", "vectorString": "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", "version": "4.0" } } ], "references": [ { "name": "https://github.com/AcademySoftwareFoundation/openexr/security/advisories/GHSA-cr4v-6jm6-4963", "tags": [ "x_refsource_CONFIRM" ], "url": "https://github.com/AcademySoftwareFoundation/openexr/security/advisories/GHSA-cr4v-6jm6-4963" } ], "affected": [ { "vendor": "AcademySoftwareFoundation", "product": "openexr", "versions": [ { "version": ">= 2.3.0, < 3.2.6", "status": "affected" }, { "version": ">= 3.3.0, < 3.3.8", "status": "affected" }, { "version": ">= 3.4.0, < 3.4.6", "status": "affected" } ] } ], "providerMetadata": { "orgId": "a0819718-46f1-4df5-94e2-005712e83aaa", "shortName": "GitHub_M", "dateUpdated": "2026-03-03T22:42:49.086Z" }, "descriptions": [ { "lang": "en", "value": "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. 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An attacker can craft a malicious EXR file that, when processed, causes an integer overflow in the `CompositeDeepScanLine::readPixels` function. This overflow leads to an undersized buffer allocation, which can then be overrun during write operations. 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