CVE-2026-63422: CWE-122: Heap-based Buffer Overflow in AcademySoftwareFoundation OpenImageIO
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 valid tiled openexr image whose width is not a multiple of its tile width can trigger an overflow when a caller reads a partial edge-tile rectangle. openexrinput::read_native_tiles() copies each row into the caller buffer using the padded whole-tile scanline_stride rather than user_scanline_bytes for the requested rectangle, resulting in a heap out-of-bounds write and memory corruption. The affected implementation is identified by src/openexr.imageio/exrinput.cpp, OpenEXRInput::read_native_tiles(), partial edge tile, user_scanline_bytes, and scanline_stride, 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.
AI Analysis
Technical Summary
CVE-2026-63422 is a heap-based buffer overflow in OpenImageIO's OpenEXRInput::read_native_tiles() function. When processing a tiled OpenEXR image with width not divisible by tile width, the function copies each row into the caller's buffer using the padded whole-tile scanline_stride rather than the user_scanline_bytes for the requested partial edge tile rectangle. This results in a heap out-of-bounds write and potential memory corruption. The vulnerability affects versions prior to 3.0.21.0, 3.1.16.0, and 3.2.0.3-beta1 and is fixed in these releases.
Potential Impact
Successful exploitation can lead to memory corruption due to heap out-of-bounds write, potentially causing denial of service or arbitrary code execution. The CVSS 3.1 score of 7.8 reflects high impact on confidentiality, integrity, and availability. The attack vector is local with low complexity and no privileges required, but user interaction is needed.
Mitigation Recommendations
Upgrade OpenImageIO to version 3.0.21.0, 3.1.16.0, or 3.2.0.3-beta1 or later where this vulnerability is fixed. No other mitigations are specified or required.
CVE-2026-63422: CWE-122: Heap-based Buffer Overflow in AcademySoftwareFoundation OpenImageIO
Description
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 valid tiled openexr image whose width is not a multiple of its tile width can trigger an overflow when a caller reads a partial edge-tile rectangle. openexrinput::read_native_tiles() copies each row into the caller buffer using the padded whole-tile scanline_stride rather than user_scanline_bytes for the requested rectangle, resulting in a heap out-of-bounds write and memory corruption. The affected implementation is identified by src/openexr.imageio/exrinput.cpp, OpenEXRInput::read_native_tiles(), partial edge tile, user_scanline_bytes, and scanline_stride, 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.
CVSS v3.1
Score 7.8high
Affected software
AcademySoftwareFoundation
OpenImageIO
pkg:github/academysoftwarefoundation/OpenImageIORun on your own infrastructure? Check whether these packages are installed with threat-finder — our free open-source scanner.
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
CVE-2026-63422 is a heap-based buffer overflow in OpenImageIO's OpenEXRInput::read_native_tiles() function. When processing a tiled OpenEXR image with width not divisible by tile width, the function copies each row into the caller's buffer using the padded whole-tile scanline_stride rather than the user_scanline_bytes for the requested partial edge tile rectangle. This results in a heap out-of-bounds write and potential memory corruption. The vulnerability affects versions prior to 3.0.21.0, 3.1.16.0, and 3.2.0.3-beta1 and is fixed in these releases.
Potential Impact
Successful exploitation can lead to memory corruption due to heap out-of-bounds write, potentially causing denial of service or arbitrary code execution. The CVSS 3.1 score of 7.8 reflects high impact on confidentiality, integrity, and availability. The attack vector is local with low complexity and no privileges required, but user interaction is needed.
Mitigation Recommendations
Upgrade OpenImageIO to version 3.0.21.0, 3.1.16.0, or 3.2.0.3-beta1 or later where this vulnerability is fixed. No other mitigations are specified or required.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- GitHub_M
- Date Reserved
- 2026-07-16T19:20:28.988Z
- Cvss Version
- 3.1
- State
- PUBLISHED
Threat ID: 6aad5cfd55bf5e2cf53217fd
Added to database: 09/18/2026, 15:47:09 UTC
Last enriched: 09/18/2026, 16:01:29 UTC
Last updated: 09/18/2026, 23:42:37 UTC
Views: 10
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