CVE-2026-34588

Full vulnerability record from the local CVENow database.
Description

OpenEXR provides the specification and reference implementation of the EXR file format, an image storage format for the motion picture industry. From 3.1.0 to before 3.2.7, 3.3.9, and 3.4.9, internal_exr_undo_piz() advances the working wavelet pointer with signed 32-bit arithmetic. Because nx, ny, and wcount are int, a crafted EXR file can make this product overflow and wrap. The next channel then decodes from an incorrect address. The wavelet decode path operates in place, so this yields both out-of-bounds reads and out-of-bounds writes. This vulnerability is fixed in 3.2.7, 3.3.9, and 3.4.9.
Severity
HIGH
CVSS score
8.6 (v4.0)
Vulnerability status
Modified
Source identifier
[email protected]
Published
2026-04-06 16:16:35.893000
Last modified
2026-10-26 22:10:00.163000
View original CVE JSON
{
  "id": "CVE-2026-34588",
  "sourceIdentifier": "[email protected]",
  "published": "2026-04-06T16:16:35.893",
  "lastModified": "2026-10-26T22:10:00.163",
  "vulnStatus": "Modified",
  "cveTags": [],
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      "lang": "en",
      "value": "OpenEXR provides the specification and reference implementation of the EXR file format, an image storage format for the motion picture industry. From 3.1.0 to before 3.2.7, 3.3.9, and 3.4.9, internal_exr_undo_piz() advances the working wavelet pointer with signed 32-bit arithmetic. Because nx, ny, and wcount are int, a crafted EXR file can make this product overflow and wrap. The next channel then decodes from an incorrect address. The wavelet decode path operates in place, so this yields both out-of-bounds reads and out-of-bounds writes. This vulnerability is fixed in 3.2.7, 3.3.9, and 3.4.9."
    },
    {
      "lang": "es",
      "value": "OpenEXR proporciona la especificación y la implementación de referencia del formato de archivo EXR, un formato de almacenamiento de imágenes para la industria cinematográfica. Desde la versión 3.1.0 hasta antes de las versiones 3.2.7, 3.3.9 y 3.4.9, internal_exr_undo_piz() avanza el puntero de wavelet de trabajo con aritmética de 32 bits con signo. Debido a que nx, ny y wcount son de tipo int, un archivo EXR manipulado puede hacer que este producto desborde y se envuelva. El siguiente canal luego decodifica desde una dirección incorrecta. La ruta de decodificación de wavelet opera in situ, por lo que esto produce tanto lecturas fuera de límites como escrituras fuera de límites. Esta vulnerabilidad está corregida en las versiones 3.2.7, 3.3.9 y 3.4.9."
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