CVE-2026-59956: CWE-125: Out-of-bounds Read 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 3.0.20.0, 3.1.15.0, and 3.2.0.3-beta1, An uncompressed 16-bit iff image with a z-buffer makes iffinput::readimg() allocate a temporary scanline from m_header.rgba_count but copy from it using m_header.pixel_bytes(), whose stride also includes z-buffer bytes. the oversized memcpy reads beyond the temporary heap buffer and copies adjacent memory into the output image, resulting in a crash or disclosure of adjacent heap data. The affected implementation is identified by src/iff.imageio/iffinput.cpp, IffInput::readimg(), m_header.rgba_count, and m_header.pixel_bytes(), which define the relevant source path, functions, state, and trigger. This issue is fixed in versions 3.0.20.0, 3.1.15.0, and 3.2.0.3-beta1.
AI Analysis
Technical Summary
OpenImageIO versions before 3.0.20.0, 3.1.15.0, and 3.2.0.3-beta1 contain an out-of-bounds read vulnerability (CWE-125) in the iffinput::readimg() function. When processing uncompressed 16-bit iff images with a z-buffer, the function allocates a temporary scanline buffer based on m_header.rgba_count but copies data using m_header.pixel_bytes(), which includes additional z-buffer bytes. This causes memcpy to read beyond the allocated buffer, potentially crashing the application or leaking adjacent heap memory. The vulnerability is fixed in the stated versions.
Potential Impact
Successful exploitation can cause application crashes or disclosure of adjacent heap memory, potentially leaking sensitive data. The CVSS 3.1 score is 6.1 (medium severity), reflecting local attack vector with low complexity, no privileges required, user interaction needed, and limited confidentiality impact but high availability impact.
Mitigation Recommendations
This vulnerability is fixed in OpenImageIO versions 3.0.20.0, 3.1.15.0, and 3.2.0.3-beta1. Users should upgrade to these or later versions to remediate the issue. No other vendor advisories indicate alternative mitigations or that no action is required.
CVE-2026-59956: CWE-125: Out-of-bounds Read 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 3.0.20.0, 3.1.15.0, and 3.2.0.3-beta1, An uncompressed 16-bit iff image with a z-buffer makes iffinput::readimg() allocate a temporary scanline from m_header.rgba_count but copy from it using m_header.pixel_bytes(), whose stride also includes z-buffer bytes. the oversized memcpy reads beyond the temporary heap buffer and copies adjacent memory into the output image, resulting in a crash or disclosure of adjacent heap data. The affected implementation is identified by src/iff.imageio/iffinput.cpp, IffInput::readimg(), m_header.rgba_count, and m_header.pixel_bytes(), which define the relevant source path, functions, state, and trigger. This issue is fixed in versions 3.0.20.0, 3.1.15.0, and 3.2.0.3-beta1.
CVSS v3.1
Score 6.1medium
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.
Weaknesses
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
OpenImageIO versions before 3.0.20.0, 3.1.15.0, and 3.2.0.3-beta1 contain an out-of-bounds read vulnerability (CWE-125) in the iffinput::readimg() function. When processing uncompressed 16-bit iff images with a z-buffer, the function allocates a temporary scanline buffer based on m_header.rgba_count but copies data using m_header.pixel_bytes(), which includes additional z-buffer bytes. This causes memcpy to read beyond the allocated buffer, potentially crashing the application or leaking adjacent heap memory. The vulnerability is fixed in the stated versions.
Potential Impact
Successful exploitation can cause application crashes or disclosure of adjacent heap memory, potentially leaking sensitive data. The CVSS 3.1 score is 6.1 (medium severity), reflecting local attack vector with low complexity, no privileges required, user interaction needed, and limited confidentiality impact but high availability impact.
Mitigation Recommendations
This vulnerability is fixed in OpenImageIO versions 3.0.20.0, 3.1.15.0, and 3.2.0.3-beta1. Users should upgrade to these or later versions to remediate the issue. No other vendor advisories indicate alternative mitigations or that no action is required.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- GitHub_M
- Date Reserved
- 2026-07-07T18:49:15.607Z
- Cvss Version
- 3.1
- State
- PUBLISHED
Threat ID: 6aad5cfd55bf5e2cf53217fb
Added to database: 09/18/2026, 15:47:09 UTC
Last enriched: 09/18/2026, 16:01:58 UTC
Last updated: 09/18/2026, 23:56:44 UTC
Views: 9
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