CVE-2026-43996

OpenImageIO is a toolset for reading, writing, and manipulating image files of any image file format relevant to VFX / animation. Prior to 3.0.18.0 and 3.1.13.0, the bounds check in TGAInput::decode_pixel computes k + palbytespp as unsigned 32-bit arithmetic. When k = 0xFFFFFFFC and palbytespp = 4, the addition wraps to 0, which compares less than palette_alloc_size and passes the check. The subsequent palette access uses the unwrapped k (0xFFFFFFFC) as the index, reading ~4 GB past the start of the palette buffer — SEGV. This vulnerability is fixed in 3.0.18.0 and 3.1.13.0.

CVSS v3 5.5 MEDIUM

5.5^/10

CVSS v3 : MEDIUM

Vector :

Exploitability : 1.8 / Impact : 3.6

Attack Vector LOCAL

Attack Complexity LOW

Privileges Required NONE

User Interaction REQUIRED

Confidentiality Impact NONE

Integrity Impact NONE

Availability Impact HIGH

Scope UNCHANGED

References

Link	Resource
https://github.com/AcademySoftwareFoundation/OpenImageIO/security/advisories/GHSA-mq8j-73c4-cr55	Exploit Vendor Advisory
https://github.com/AcademySoftwareFoundation/OpenImageIO/security/advisories/GHSA-mq8j-73c4-cr55	Exploit Vendor Advisory

Configurations

Configuration 1 (hide)

OR	cpe:2.3:a:openimageio:openimageio::::::::
	cpe:2.3:a:openimageio:openimageio::::::::
	cpe:2.3:a:openimageio:openimageio:3.2.0.0:dev::::::
	cpe:2.3:a:openimageio:openimageio:3.2.0.2:dev::::::

History

26 Oct 2026, 14:10

Type	Values Removed	Values Added
Summary		(es) OpenImageIO es un conjunto de herramientas para leer, escribir y manipular archivos de imagen de cualquier formato de archivo de imagen relevante para VFX / animación. Antes de 3.0.18.0 y 3.1.13.0, la comprobación de límites en TGAInput::decode_pixel calcula k + palbytespp como aritmética sin signo de 32 bits. Cuando k = 0xFFFFFFFC y palbytespp = 4, la suma se ajusta a 0, lo que se compara como menor que palette_alloc_size y pasa la comprobación. El acceso posterior a la paleta utiliza la k sin ajustar (0xFFFFFFFC) como índice, leyendo ~4 GB más allá del inicio del búfer de la paleta - SEGV. Esta vulnerabilidad se corrige en 3.0.18.0 y 3.1.13.0.

Information

Published : 2026-05-14 20:17

Updated : 2026-10-26 14:10

NVD link : CVE-2026-43996

Mitre link : CVE-2026-43996

CVE.ORG link : CVE-2026-43996

JSON object : View

Products Affected

openimageio

openimageio

CWE

CWE-125

Out-of-bounds Read

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