CVE-2026-26981

{"id": "CVE-2026-26981", "cveTags": [], "metrics": {"cvssMetricV31": [{"type": "Secondary", "source": "security-advisories@github.com", "cvssData": {"scope": "UNCHANGED", "version": "3.1", "baseScore": 6.5, "attackVector": "NETWORK", "baseSeverity": "MEDIUM", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H", "integrityImpact": "NONE", "userInteraction": "REQUIRED", "attackComplexity": "LOW", "availabilityImpact": "HIGH", "privilegesRequired": "NONE", "confidentialityImpact": "NONE"}, "impactScore": 3.6, "exploitabilityScore": 2.8}]}, "published": "2026-02-24T03:16:01.890", "references": [{"url": "https://github.com/AcademySoftwareFoundation/openexr/commit/6bb2ddf1068573d073edf81270a015b38cc05cef", "tags": ["Patch"], "source": "security-advisories@github.com"}, {"url": "https://github.com/AcademySoftwareFoundation/openexr/commit/d2be382758adc3e9ab83a3de35138ec28d93ebd8", "tags": ["Patch"], "source": "security-advisories@github.com"}, {"url": "https://github.com/AcademySoftwareFoundation/openexr/security/advisories/GHSA-q6vj-wxvf-5m8c", "tags": ["Exploit", "Vendor Advisory"], "source": "security-advisories@github.com"}], "vulnStatus": "Analyzed", "weaknesses": [{"type": "Primary", "source": "security-advisories@github.com", "description": [{"lang": "en", "value": "CWE-195"}]}], "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 versions 3.3.0 through 3.3.6 and 3.4.0 through 3.4.4, a heap-buffer-overflow (OOB read) occurs in the `istream_nonparallel_read` function in `ImfContextInit.cpp` when parsing a malformed EXR file through a memory-mapped `IStream`. A signed integer subtraction produces a negative value that is implicitly converted to `size_t`, resulting in a massive length being passed to `memcpy`. Versions 3.3.7 and 3.4.5 contain a patch."}, {"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 las versiones 3.3.0 a 3.3.6 y 3.4.0 a 3.4.4, ocurre un desbordamiento de b\u00fafer de pila (lectura fuera de l\u00edmites) en la funci\u00f3n `istream_nonparallel_read` en `ImfContextInit.cpp` al analizar un archivo EXR malformado a trav\u00e9s de un `IStream` mapeado en memoria. Una resta de enteros con signo produce un valor negativo que se convierte impl\u00edcitamente a `size_t`, lo que resulta en una longitud masiva que se pasa a `memcpy`. Las versiones 3.3.7 y 3.4.5 contienen un parche."}], "lastModified": "2026-02-25T17:30:34.797", "configurations": [{"nodes": [{"negate": false, "cpeMatch": [{"criteria": "cpe:2.3:a:openexr:openexr:*:*:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "9609FA05-1955-406E-BF47-2DB544450059", "versionEndExcluding": "3.3.7", "versionStartIncluding": "3.3.0"}, {"criteria": "cpe:2.3:a:openexr:openexr:*:*:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "DD82B1F5-5B57-49E4-A50C-303F66BB55C0", "versionEndExcluding": "3.4.5", "versionStartIncluding": "3.4.0"}], "operator": "OR"}]}], "sourceIdentifier": "security-advisories@github.com"}