Bug 2538343 (CVE-2026-59181)

Summary: CVE-2026-59181 OpenImageIO: OpenImageIO: Stack buffer overflow leads to denial of service
Product: [Other] Security Response Reporter: OSIDB Bzimport <bzimport>
Component: vulnerabilityAssignee: Product Security DevOps Team <prodsec-dev>
Status: NEW --- QA Contact:
Severity: medium Docs Contact:
Priority: medium    
Version: unspecifiedKeywords: Security
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Hardware: All   
OS: Linux   
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A flaw was found in OpenImageIO. A specially crafted Cineon image file, when processed by OpenImageIO, can cause a stack buffer overflow. This vulnerability allows an attacker to trigger memory corruption, which can lead to a denial of service (DoS) by making the application unresponsive or crash.
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Bug Depends On: 2539163, 2539164, 2539165    
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Description OSIDB Bzimport 2026-09-22 18:10:55 UTC 
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, A crafted cineon file can supply a numberofelements value greater than the format maximum of eight. cineoninput::open() uses that unchecked value as the loop bound while filling the fixed strings[8] array, writing pointers beyond the stack buffer and into adjacent state, resulting in memory corruption and denial of service. The affected implementation is identified by src/cineon.imageio/cineoninput.cpp, CineonInput::open(), numberOfElements, and strings[8], 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.