CVE-2026-40250

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In versions 3.4.0 through 3.4.9, 3.3.0 through 3.3.9, and 3.2.0 through 3.2.7, `internal_dwa_compressor.h:1040` performs `chan->width * chan->bytes_per_element` in `int32` arithmetic without a `(size_t)` cast. This is the same overflow pattern fixed in other decoders by CVE-2026-34589/34588/34544, but this line was missed. Versions 3.4.10, 3.3.10, and 3.2.8 contain a fix that addresses `internal_dwa_compressor.h:1040`."}, {"lang": "es", "value": "OpenEXR proporciona la especificaci\u00f3n e implementaci\u00f3n de referencia del formato de archivo EXR, un formato de almacenamiento de im\u00e1genes para la industria cinematogr\u00e1fica. En las versiones 3.4.0 a 3.4.9, 3.3.0 a 3.3.9 y 3.2.0 a 3.2.7, internal_dwa_compressor.h:1040 realiza chan -> width * chan -> bytes_per_element en aritm\u00e9tica int32 sin una conversi\u00f3n de tipo (size_t). Este es el mismo patr\u00f3n de desbordamiento corregido en otros decodificadores por CVE-2026-34589/34588/34544, pero esta l\u00ednea se pas\u00f3 por alto. Las versiones 3.4.10, 3.3.10 y 3.2.8 contienen una correcci\u00f3n que aborda internal_dwa_compressor.h:1040."}], "id": "CVE-2026-40250", "lastModified": "2026-10-26T21:10:00.170", "metrics": {"cvssMetricV31": [{"cvssData": {"attackComplexity": "LOW", "attackVector": "LOCAL", "availabilityImpact": "HIGH", "baseScore": 7.1, "baseSeverity": "HIGH", "confidentialityImpact": "NONE", "integrityImpact": "HIGH", "privilegesRequired": "NONE", "scope": "UNCHANGED", "userInteraction": "REQUIRED", "vectorString": "CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:H/A:H", "version": "3.1"}, "exploitabilityScore": 1.8, "impactScore": 5.2, "source": "nvd@nist.gov", "type": "Primary"}], "cvssMetricV40": [{"cvssData": {"Automatable": "NOT_DEFINED", "Recovery": "NOT_DEFINED", "Safety": "NOT_DEFINED", "attackComplexity": "LOW", "attackRequirements": "NONE", "attackVector": "LOCAL", "availabilityRequirement": "NOT_DEFINED", "baseScore": 8.4, "baseSeverity": "HIGH", "confidentialityRequirement": "NOT_DEFINED", "exploitMaturity": "NOT_DEFINED", "integrityRequirement": "NOT_DEFINED", "modifiedAttackComplexity": "NOT_DEFINED", "modifiedAttackRequirements": "NOT_DEFINED", "modifiedAttackVector": "NOT_DEFINED", "modifiedPrivilegesRequired": "NOT_DEFINED", "modifiedSubAvailabilityImpact": "NOT_DEFINED", "modifiedSubConfidentialityImpact": "NOT_DEFINED", "modifiedSubIntegrityImpact": "NOT_DEFINED", "modifiedUserInteraction": "NOT_DEFINED", "modifiedVulnAvailabilityImpact": "NOT_DEFINED", "modifiedVulnConfidentialityImpact": "NOT_DEFINED", "modifiedVulnIntegrityImpact": "NOT_DEFINED", "privilegesRequired": "NONE", "providerUrgency": "NOT_DEFINED", "subAvailabilityImpact": "NONE", "subConfidentialityImpact": "NONE", "subIntegrityImpact": "NONE", "userInteraction": "ACTIVE", "valueDensity": "NOT_DEFINED", "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/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X", "version": "4.0", "vulnAvailabilityImpact": "HIGH", "vulnConfidentialityImpact": "HIGH", "vulnIntegrityImpact": "HIGH", "vulnerabilityResponseEffort": "NOT_DEFINED"}, "source": "security-advisories@github.com", "type": "Secondary"}], "ssvcV203": [{"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "ssvcData": {"id": "CVE-2026-40250", "options": [{"exploitation": "none"}, {"automatable": "no"}, {"technicalImpact": "total"}], "role": "CISA Coordinator", "timestamp": "2026-04-22T00:00:00+00:00", "version": "2.0.3"}}]}, "published": "2026-04-21T02:16:08.213", "references": [{"source": "security-advisories@github.com", "tags": ["Product", "Release Notes"], "url": "https://github.com/AcademySoftwareFoundation/openexr/releases/tag/v3.2.8"}, {"source": "security-advisories@github.com", "tags": ["Product", "Release Notes"], "url": "https://github.com/AcademySoftwareFoundation/openexr/releases/tag/v3.3.10"}, {"source": "security-advisories@github.com", "tags": ["Product", "Release Notes"], "url": "https://github.com/AcademySoftwareFoundation/openexr/releases/tag/v3.4.10"}, {"source": "security-advisories@github.com", "tags": ["Mitigation", "Vendor Advisory"], "url": "https://github.com/AcademySoftwareFoundation/openexr/security/advisories/GHSA-m5qw-23x2-6phj"}], "sourceIdentifier": "security-advisories@github.com", "vulnStatus": "Analyzed", "weaknesses": [{"description": [{"lang": "en", "value": "CWE-190"}], "source": "security-advisories@github.com", "type": "Secondary"}]}

{"bugzilla": {"description": "OpenEXR: OpenEXR: Integer overflow leads to memory corruption and denial of service", "id": "2459962", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2459962"}, "csaw": false, "cvss3": {"cvss3_base_score": "6.8", "cvss3_scoring_vector": "CVSS:3.1/AV:L/AC:L/PR:L/UI:R/S:U/C:L/I:H/A:H", "status": "draft"}, "cwe": "CWE-190", "details": ["A flaw was found in OpenEXR, a library for the EXR image file format. An integer overflow vulnerability exists in the `internal_dwa_compressor.h` component during the calculation of image channel dimensions. This issue, caused by insufficient handling of `int32` arithmetic, could allow a local attacker to cause memory corruption by enticing a user to open a specially crafted EXR file. This may lead to a denial of service or potentially more severe impacts."], "mitigation": {"lang": "en:us", "value": "To mitigate this issue, users should avoid opening or processing untrusted EXR image files. If processing EXR files is necessary, ensure they originate from trusted sources. This operational control reduces the risk of a local attacker exploiting the integer overflow vulnerability."}, "name": "CVE-2026-40250", "package_state": [{"cpe": "cpe:/o:redhat:enterprise_linux:10", "fix_state": "Fix deferred", "package_name": "openexr", "product_name": "Red Hat Enterprise Linux 10"}, {"cpe": "cpe:/o:redhat:enterprise_linux:6", "fix_state": "Fix deferred", "package_name": "OpenEXR", "product_name": "Red Hat Enterprise Linux 6"}, {"cpe": "cpe:/o:redhat:enterprise_linux:7", "fix_state": "Fix deferred", "package_name": "OpenEXR", "product_name": "Red Hat Enterprise Linux 7"}, {"cpe": "cpe:/o:redhat:enterprise_linux:8", "fix_state": "Fix deferred", "package_name": "OpenEXR", "product_name": "Red Hat Enterprise Linux 8"}, {"cpe": "cpe:/o:redhat:enterprise_linux:9", "fix_state": "Fix deferred", "package_name": "openexr", "product_name": "Red Hat Enterprise Linux 9"}], "public_date": "2026-04-21T01:33:00Z", "references": ["https://www.cve.org/CVERecord?id=CVE-2026-40250\nhttps://nvd.nist.gov/vuln/detail/CVE-2026-40250\nhttps://github.com/AcademySoftwareFoundation/openexr/releases/tag/v3.2.8\nhttps://github.com/AcademySoftwareFoundation/openexr/releases/tag/v3.3.10\nhttps://github.com/AcademySoftwareFoundation/openexr/releases/tag/v3.4.10\nhttps://github.com/AcademySoftwareFoundation/openexr/security/advisories/GHSA-m5qw-23x2-6phj"], "threat_severity": "Moderate"}

{"affected": [{"configurations": [{"platform": null, "status": "affected", "versions": {"scheme": "semver", "value": "[3.2.0,3.2.8)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "semver", "value": "[3.3.0,3.3.10)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "semver", "value": "[3.4.0,3.4.10)"}}], "enrichment": {"confidence": 82.0, "confidence_source": "matching", "scores": [{"score": 95.0, "source": "inferred"}, {"score": 82.0, "source": "matching"}]}, "original": {"product": "openexr", "source": "cna", "vendor": "AcademySoftwareFoundation"}, "product": "openexr", "vendor": "academysoftwarefoundation"}], "analysis": {"en": {"generated_at": "2026-04-22T05:49:02.100655+00:00", "value": {"mitigation_remediation": ["Upgrade OpenEXR to version 3.2.8, 3.3.10, or 3.4.10 or newer.", "If an upgrade cannot occur immediately, add input\u2011validation checks to ensure width and bytes_per_element are within reasonable bounds before processing as a temporary precaution.", "Where possible, isolate EXR file decoding in a sandboxed or restricted process to contain any potential memory corruption."], "summary": {"action": "Immediate Patch", "impact": "Potential memory corruption due to integer overflow"}, "threat_synthesis": {"affected_systems": "The vulnerability affects the open-source Academy Software Foundation OpenEXR library. Vulnerable releases include 3.2.0 through 3.2.7, 3.3.0 through 3.3.9, and 3.4.0 through 3.4.9. Versions 3.2.8, 3.3.10, and 3.4.10 contain the fix that properly casts the operands before the multiplication.", "description_and_impact": "OpenEXR's internal DWA decoder performs a 32\u2011bit integer multiplication that is not cast to a larger type, leading to a potential integer overflow when calculating channel size. This can corrupt memory via outBufferEnd pointer arithmetic. The vulnerability is categorized as CWE\u2011190.", "risk_and_exploitability": "The CVSS score of 8.4 indicates high severity. The EPSS score is below 1%, indicating a low current exploitation probability. The CVE description does not provide details on how the overflow might be triggered or the precise impact, so information on exploitation methods is not available. The flaw is not listed in CISA's KEV catalog."}}}}, "created": "2026-04-22T06:00:09.652298+00:00", "updated": "2026-04-22T11:46:55.612197+00:00", "vendors": ["academysoftwarefoundation", "academysoftwarefoundation$PRODUCT$openexr"]}