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CVE-2026-63422— OpenImageIO OpenEXR plugin partial edge tile heap out-of-bounds write

Quick assessment

Affected
AcademySoftwareFoundation OpenImageIO
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

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 tr

CVSS 7.8 · High

Affected Version Matrix 3

VendorProduct Version RangeStatus
AcademySoftwareFoundation OpenImageIO < 3.0.21.0 affected
>= 3.1.0.0, < 3.1.16.0 affected
>= 3.2.0.0-dev, < 3.2.0.3-beta1 affected
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I. Basic Information for CVE-2026-63422

Vulnerability Information

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Vulnerability Title
OpenImageIO OpenEXR plugin partial edge tile heap out-of-bounds write
Source: CVE Program / CVE List V5
Vulnerability 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.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
Source: CVE Program / CVE List V5
Vulnerability Type
堆缓冲区溢出
Source: CVE Program / CVE List V5

Affected Products

Vendor Product Affected Versions CPE Subscribe
AcademySoftwareFoundation OpenImageIO < 3.0.21.0 -

II. Public POCs for CVE-2026-63422

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III. Intelligence Information for CVE-2026-63422

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Patches & Fixes for CVE-2026-63422 (2)

Other References for CVE-2026-63422 (3)

Same Patch Batch · AcademySoftwareFoundation · 2026-09-18 · 11 CVEs total

CVE-2026-63638 8.3 HIGH OpenImageIO: Cineon invalid bit depth heap out-of-bounds write
CVE-2026-63419 7.8 HIGH OpenImageIO: IFF ZBUFFER tile read writes past caller tile buffer
CVE-2026-67549 7.6 HIGH OpenImageIO: TIFF 1-bit CMYK bit conversion heap out-of-bounds write
CVE-2026-59156 6.5 MEDIUM OpenImageIO: Unbounded recursion in FITS header parser leads to stack overflow
CVE-2026-59956 6.1 MEDIUM OpenImageIO: Heap-buffer-overread in IffInput::readimg() when ZBUFFER flag is set
CVE-2026-59181 6.1 MEDIUM OpenImageIO: Stack buffer overflow in OpenImageIO Cineon reader via unchecked numberOfElem
CVE-2026-63420 5.5 MEDIUM OpenImageIO: PSD RawColor indexed image out-of-bounds read in `interleave_row`
CVE-2026-63635 5.5 MEDIUM OpenImageIO: PSD RawColor invalid color mode causes global out-of-bounds read and allocati
CVE-2026-65969 5.5 MEDIUM OpenImageIO: TGA-to-GIF palette split signed overflow causes SIGSEGV
CVE-2026-65970 5.3 MEDIUM OpenImageIO: TIFF multithreaded scanline read use-after-scope in `TIFFInput::read_native_s

IV. Related Vulnerabilities

Same product: OpenImageIO
Same vendor: AcademySoftwareFoundation
Same weakness: CWE-122

V. Comments for CVE-2026-63422

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