AcademySoftwareFoundation OpenEXR up to 3.3.12/3.4.13 PyOpenEXR heap-based overflow

Summaryinfo

A vulnerability was found in AcademySoftwareFoundation OpenEXR up to 3.3.12/3.4.13 and classified as problematic. Impacted is an unknown function of the component PyOpenEXR. Executing a manipulation can lead to heap-based overflow. The identification of this vulnerability is CVE-2026-68514. The attack can only be executed locally. There is no exploit available.

Detailsinfo

A vulnerability was found in AcademySoftwareFoundation OpenEXR up to 3.3.12/3.4.13. It has been declared as problematic. This vulnerability affects an unknown code of the component PyOpenEXR. The manipulation with an unknown input leads to a heap-based overflow vulnerability. The CWE definition for the vulnerability is CWE-122. A heap overflow condition is a buffer overflow, where the buffer that can be overwritten is allocated in the heap portion of memory, generally meaning that the buffer was allocated using a routine such as malloc(). As an impact it is known to affect availability. CVE summarizes:

OpenEXR is the reference implementation and specification for the EXR image file format, widely used in the motion picture industry. In versions 3.3.0 through 3.3.12 and 3.4.0 through 3.4.13, the PyOpenEXR Python bindings contain a heap out-of-bounds write triggered when reading a crafted deep scanline EXR file. When a deep file declares a literal channel named left alongside layer-prefixed RGB channels left.R, left.G, and left.B, the wrapper processes the literal left channel first and allocates a scalar deep sample array for it, then reuses that same array as the coalesced destination for the prefixed RGB group. The deep reader registers sample slices with an RGB stride (three lanes) into storage that was allocated with scalar shape, so decoding the deep samples writes past the allocation. Opening such a file through the default public Python API, OpenEXR.File(path), causes a heap buffer overflow during normal deep sample decode, leading to memory corruption and a crash. This issue is fixed in versions 3.3.13 and 3.4.14.

The advisory is shared for download at github.com. This vulnerability was named CVE-2026-68514 since 07/30/2026. The exploitation appears to be easy. The attack needs to be approached locally. Successful exploitation requires user interaction by the victim. There are neither technical details nor an exploit publicly available.

Upgrading to version 3.3.13 or 3.4.14 eliminates this vulnerability.

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Productinfo

Vendor

• AcademySoftwareFoundation

Name

• OpenEXR

Version

• 3.3.0
• 3.3.1
• 3.3.2
• 3.3.3
• 3.3.4
• 3.3.5
• 3.3.6
• 3.3.7
• 3.3.8
• 3.3.9
• 3.3.10
• 3.3.11
• 3.3.12
• 3.4.0
• 3.4.1
• 3.4.2
• 3.4.3
• 3.4.4
• 3.4.5
• 3.4.6
• 3.4.7
• 3.4.8
• 3.4.9
• 3.4.10
• 3.4.11
• 3.4.12
• 3.4.13

License

• open-source

Website

• Product: https://github.com/AcademySoftwareFoundation/openexr/

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