AcademySoftwareFoundation OpenImageIO prior 3.0.21.0/3.1.16.0/3.2.0.3-beta1 Iff Decoder iffinput.cpp read_native_tile out-of-bounds write

Summaryinfo

A vulnerability described as problematic has been identified in AcademySoftwareFoundation OpenImageIO. This affects the function IffInput::read_native_tile of the file src/iff.imageio/iffinput.cpp of the component Iff Decoder. The manipulation results in out-of-bounds write. This vulnerability is known as CVE-2026-63419. Attacking locally is a requirement. No exploit is available. Upgrading the affected component is recommended.

Detailsinfo

A vulnerability was found in AcademySoftwareFoundation OpenImageIO. It has been classified as problematic. Affected is the function IffInput::read_native_tile of the file src/iff.imageio/iffinput.cpp of the component Iff Decoder. The manipulation with an unknown input leads to a out-of-bounds write vulnerability. CWE is classifying the issue as CWE-787. The product writes data past the end, or before the beginning, of the intended buffer. This is going to have an impact on confidentiality, integrity, and availability. CVE summarizes:

OpenImageIO is a toolset for reading, writing, and manipulating image files of any image file format relevant to VFX / animation. Prior to 3.0.21.0, 3.1.16.0, and 3.2.0.3-beta1, A zbuffer-only tiled iff is exposed with a 16-bit public imagespec while the decoder retains a 32-bit internal pixel size. iffinput::read_native_tile() copies according to m_header.pixel_bytes() rather than imagespec::tile_bytes(true), and a failed read can leave m_buf nonempty so a later call copies partially initialized data into the undersized caller buffer, resulting in a heap out-of-bounds write and memory corruption. The affected implementation is identified by src/iff.imageio/iffinput.cpp, IffInput::read_native_tile(), ImageSpec::tile_bytes(true), m_header.pixel_bytes(), ZBUFFER, and m_buf, which define the relevant source path, functions, state, and trigger. This issue is fixed in versions 3.0.21.0, 3.1.16.0, and 3.2.0.3-beta1.

The advisory is shared for download at github.com. This vulnerability is traded as CVE-2026-63419 since 07/16/2026. The exploitability is told to be easy. The attack needs to be approached locally. Successful exploitation requires user interaction by the victim. There are known technical details, but no exploit is available.

Upgrading to version 3.0.21.0, 3.1.16.0 or 3.2.0.3-beta1 eliminates this vulnerability.

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Productinfo

Vendor

• AcademySoftwareFoundation

Name

• OpenImageIO

License

• open-source

Website

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

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