OpenImageIO OpenEXR plugin partial edge tile heap out-of-bounds write

MITRE NVD CVE.ORG JSON API

Summary

CVECVE-2026-63422
StatePUBLISHED
AssignerGitHub_M
Source PriorityCVE Program / NVD first with legacy fallback
Published2026-09-18 16:17:07 UTC
Updated2026-09-18 16:17:07 UTC
DescriptionOpenImageIO 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.

Risk And Classification

Primary CVSS: v3.1 7.8 HIGH from [email protected]

CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H

EPSS: 0.001370000 probability, percentile 0.034660000 (date 2026-09-19)

Problem Types: CWE-122 | CWE-787 | CWE-122 CWE-122: Heap-based Buffer Overflow | CWE-787 CWE-787: Out-of-bounds Write

VersionSourceTypeScoreSeverityVector
3.1[email protected]Secondary7.8HIGHCVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
3.1CNADECLARED7.8HIGHCVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H

CVSS v3.1 Breakdown

Attack Vector
Local
Attack Complexity
Low
Privileges Required
None
User Interaction
Required
Scope
Unchanged
Confidentiality
High
Integrity
High
Availability
High

CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H

Vendor Declared Affected Products

SourceVendorProductVersionPlatforms
CNA AcademySoftwareFoundation OpenImageIO affected < 3.0.21.0 Not specified
CNA AcademySoftwareFoundation OpenImageIO affected >= 3.1.0.0, < 3.1.16.0 Not specified
CNA AcademySoftwareFoundation OpenImageIO affected >= 3.2.0.0-dev, < 3.2.0.3-beta1 Not specified

References

ReferenceSourceLinkTags
github.com/AcademySoftwareFoundation/OpenImageIO/releases/tag/v3.1.16.0 [email protected] github.com
github.com/AcademySoftwareFoundation/OpenImageIO/releases/tag/v3.0.21.0 [email protected] github.com
github.com/AcademySoftwareFoundation/OpenImageIO/commit/7303134f13b0f9dc... [email protected] github.com
github.com/AcademySoftwareFoundation/OpenImageIO/pull/5295 [email protected] github.com
github.com/AcademySoftwareFoundation/OpenImageIO/security/advisories/GHS... [email protected] github.com
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