CVE-2026-44663

{
  "id": "CVE-2026-44663",
  "sourceIdentifier": "[email protected]",
  "published": "2026-06-18T21:16:28.767",
  "lastModified": "2026-10-26T11:10:00.157",
  "vulnStatus": "Analyzed",
  "cveTags": [],
  "descriptions": [
    {
      "lang": "en",
      "value": "OpenEXR is the reference implementation and specification for the EXR image format, widely used in the motion picture industry. In versions 3.4.0 through 3.4.11, an integer overflow in ht_undo_impl() in src/lib/OpenEXRCore/internal_ht.cpp leads to a heap-buffer overflow when decoding a crafted HTJ2K-compressed EXR file. decode->channels[i].width (int32_t) is multiplied by bytes_per_element in 32-bit signed arithmetic. With large widths (e.g., >= 536870912 for FLOAT data), this overflows, producing a corrupted offset that is later used for pointer arithmetic and can cause a heap out-of-bounds write. The same unchecked multiplication pattern appears in two other HTJ2K paths (bytes-per-line accumulation and pixel-line pointer advancement). As with related CVE-2026-34378 through CVE-2026-34589 fixes in other codecs, validating only after the multiplication is too late because the value may already be overflowed. This issue has been fixed in version 3.4.12."
    },
    {
      "lang": "es",
      "value": "OpenEXR es la implementación de referencia y especificación para el formato de imagen EXR, ampliamente utilizado en la industria cinematográfica. En las versiones 3.4.0 a 3.4.11, un desbordamiento de entero en ht_undo_impl() en src/lib/OpenEXRCore/internal_ht.cpp conduce a un desbordamiento de búfer de pila al decodificar un archivo EXR comprimido con HTJ2K manipulado. decode  ->  channels[i].width (int32_t) se multiplica por bytes_per_element en aritmética con signo de 32 bits. Con anchos grandes (por ejemplo, >= 536870912 para datos FLOAT), esto se desborda, produciendo un desplazamiento corrupto que se utiliza posteriormente para aritmética de punteros y puede causar una escritura fuera de límites en la pila. El mismo patrón de multiplicación sin verificar aparece en otras dos rutas HTJ2K (acumulación de bytes por línea y avance del puntero de línea de píxeles). Al igual que con las correcciones relacionadas CVE-2026-34378 a CVE-2026-34589 en otros códecs, validar solo después de la multiplicación es demasiado tarde porque el valor ya podría haberse desbordado. Este problema ha sido corregido en la versión 3.4.12."
    }
  ],
  "affected": [
    {
      "source": "[email protected]",
      "affectedData": [
        {
          "vendor": "AcademySoftwareFoundation",
          "product": "openexr",
          "versions": [
            {
              "version": ">= 3.4.0, < 3.4.11",
              "status": "affected"
            }
          ]
        }
      ]
    }
  ],
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        "type": "Secondary",
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          "baseScore": 6.1,
          "baseSeverity": "MEDIUM",
          "attackVector": "LOCAL",
          "attackComplexity": "LOW",
          "privilegesRequired": "NONE",
          "userInteraction": "REQUIRED",
          "scope": "UNCHANGED",
          "confidentialityImpact": "NONE",
          "integrityImpact": "LOW",
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          "privilegesRequired": "NONE",
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          "scope": "UNCHANGED",
          "confidentialityImpact": "NONE",
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        "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
        "ssvcData": {
          "timestamp": "2026-06-22T15:47:13.159306Z",
          "id": "CVE-2026-44663",
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  "references": [
    {
      "url": "https://github.com/AcademySoftwareFoundation/openexr/releases/tag/v3.4.12",
      "source": "[email protected]",
      "tags": [
        "Release Notes"
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