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CVE-2026-63422

Openimageio buffer overflow

7.8 HIGHPublic exploitEPSS 0.21%
  1. Published18 Sept 2026

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 3.1 breakdown

Attack vectorLocal
Attack complexityLow
Privileges requiredNone
User interactionRequired
ScopeUnchanged
ConfidentialityHigh
IntegrityHigh
AvailabilityHigh
CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H

Affected products

Openimageio≥ 3.1.0.0 ≤ 3.1.16.0 · < 3.0.21.0 · 3.2.0.0 · 3.2.0.2

Remediation

Fixed in
Openimageio≥ 3.0.21.0

References

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Frequently asked

Is CVE-2026-63422 being actively exploited?

CVE-2026-63422 is not in the CISA KEV catalog. A public exploit reference exists, so treat it as exploitable. Its EPSS exploit probability is 0.21%.

How severe is CVE-2026-63422?

CVE-2026-63422 has a CVSS 3.1 base score of 7.8, rated high. EPSS estimates a 0.21% probability of exploitation.

Which products are affected by CVE-2026-63422?

Affected products include Openimageio.

How do I fix CVE-2026-63422?

Upgrade affected software to a fixed version, for example Openimageio 3.0.21.0 or later, then confirm no affected versions remain in your inventory.

How Secuno handles this

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Data from the NVD, CISA KEV catalog and FIRST EPSS. CVSS 3.1 base score shown where available.