CVE-2026-27622

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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. 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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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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."}, {"lang": "es", "value": "OpenEXR proporciona la especificaci\u00f3n y la implementaci\u00f3n de referencia del formato de archivo EXR, un formato de almacenamiento de im\u00e1genes para la industria cinematogr\u00e1fica. En CompositeDeepScanLine::readPixels, los totales por p\u00edxel se acumulan en vector total_sizes para grandes recuentos controlados por el atacante en muchas partes, total_sizes[ptr] se ajusta m\u00f3dulo 2^32. overall_sample_count se deriva entonces de los totales ajustados y se utiliza en samples[channel].resize(overall_sample_count). La configuraci\u00f3n/consumo del puntero de decodificaci\u00f3n procede con recuentos de muestras verdaderos, y las operaciones de escritura en el desempaquetado central (generic_unpack_deep_pointers) desbordan el b\u00fafer de muestras compuesto de tama\u00f1o insuficiente. Esta vulnerabilidad se corrige en las versiones v3.2.6, v3.3.8 y v3.4.6."}], "id": "CVE-2026-27622", "lastModified": "2026-07-15T02:19:08.643", "metrics": {"cvssMetricV31": [{"cvssData": {"attackComplexity": "LOW", "attackVector": "LOCAL", "availabilityImpact": "HIGH", "baseScore": 7.8, "baseSeverity": "HIGH", "confidentialityImpact": "HIGH", "integrityImpact": "HIGH", "privilegesRequired": "NONE", "scope": "UNCHANGED", "userInteraction": "REQUIRED", "vectorString": "CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H", "version": "3.1"}, "exploitabilityScore": 1.8, "impactScore": 5.9, "source": "nvd@nist.gov", "type": "Primary"}, {"cvssData": {"attackComplexity": "HIGH", "attackVector": "LOCAL", "availabilityImpact": "HIGH", "baseScore": 7.4, "baseSeverity": "HIGH", "confidentialityImpact": "HIGH", "integrityImpact": "HIGH", "privilegesRequired": "NONE", "scope": "UNCHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:L/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H", "version": "3.1"}, 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{"bugzilla": {"description": "openexr: OpenEXR: Arbitrary code execution via integer overflow in EXR file processing", "id": "2444251", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2444251"}, "csaw": false, "cvss3": {"cvss3_base_score": "7.4", "cvss3_scoring_vector": "CVSS:3.1/AV:L/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H", "status": "draft"}, "cwe": "CWE-190", "details": ["No description is available for this CVE."], "mitigation": {"lang": "en:us", "value": "Mitigation for this issue is either not available or the currently available options do not meet the Red Hat Product Security criteria comprising ease of use and deployment, applicability to widespread installation base or stability."}, "name": "CVE-2026-27622", "package_state": [{"cpe": "cpe:/o:redhat:enterprise_linux:10", "fix_state": "Affected", "package_name": "OpenEXR", "product_name": "Red Hat Enterprise Linux 10"}, {"cpe": "cpe:/o:redhat:enterprise_linux:6", "fix_state": "Out of support scope", "package_name": "OpenEXR", "product_name": "Red Hat Enterprise Linux 6"}, {"cpe": "cpe:/o:redhat:enterprise_linux:7", "fix_state": "Out of support scope", "package_name": "OpenEXR", "product_name": "Red Hat Enterprise Linux 7"}, {"cpe": "cpe:/o:redhat:enterprise_linux:8", "fix_state": "Affected", "package_name": "OpenEXR", "product_name": "Red Hat Enterprise Linux 8"}, {"cpe": "cpe:/o:redhat:enterprise_linux:9", "fix_state": "Affected", "package_name": "OpenEXR", "product_name": "Red Hat Enterprise Linux 9"}], "public_date": "2026-03-03T22:42:49Z", "references": ["https://www.cve.org/CVERecord?id=CVE-2026-27622\nhttps://nvd.nist.gov/vuln/detail/CVE-2026-27622\nhttps://github.com/AcademySoftwareFoundation/openexr/security/advisories/GHSA-cr4v-6jm6-4963"], "threat_severity": "Important"}

{"affected": [{"configurations": [{"platform": null, "status": "affected", "versions": {"scheme": "semver", "value": "[2.3.0,3.2.6)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "semver", "value": "[3.3.0,3.3.8)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "semver", "value": "[3.4.0,3.4.6)"}}], "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": "2026-04-16T05:45:17.316470+00:00", "value": {"mitigation_remediation": ["Apply the vendor patch for OpenEXR v3.2.6, v3.3.8, or v3.4.6 (or any later release).", "Upgrade to the newest supported OpenEXR release to ensure the integer\u2011overflow and heap\u2011OOB write issues are resolved.", "If immediate upgrade is not feasible, restrict or disable processing of untrusted EXR files in the affected systems and monitor for anomalous file handling activity."], "summary": {"action": "Immediate Patch", "impact": "Arbitrary memory write potentially leading to code execution"}, "threat_synthesis": {"affected_systems": "The vulnerability affects the AcademySoftwareFoundation\u00a0OpenEXR implementation. Versions prior to v3.2.6, v3.3.8, and v3.4.6 are vulnerable. The fix is included in those releases and in all subsequent OpenEXR releases.", "description_and_impact": "OpenEXR\u2019s\u00a0CompositeDeepScanLine::readPixels uses attacker\u2011controlled counts to accumulate per\u2011pixel totals, which wrap modulo\u202f2^32. The wrapped totals are later used to resize sample buffers. When the actual sample counts exceed the resized buffer size, a heap out\u2011of\u2011bounds write occurs. This memory corruption can allow an attacker to overwrite arbitrary heap data and potentially execute arbitrary code.", "risk_and_exploitability": "The CVSS score of 8.4 classifies the flaw as high severity. The EPSS score of <\u202f1% indicates that, as of this analysis, exploitation is unlikely but not impossible. The vulnerability is not listed in CISA\u2019s KEV catalog. Exploitation requires crafting a malicious EXR file that triggers the over\u2011run during the CompositeDeepScanLine pixel read process. It thus likely depends on an attacker\u2019s ability to provide a file to a vulnerable application that processes OpenEXR images; it is not a publicly accessible remote code execution vector but could be used in local or privilege\u2011escalation scenarios if the application runs with elevated rights."}}}}, "created": "2026-03-04T14:53:31.285356+00:00", "updated": "2026-04-16T05:45:26.024904+00:00", "vendors": ["academysoftwarefoundation", "academysoftwarefoundation$PRODUCT$openexr"]}