Bug 2538153 (CVE-2026-65970)

Summary: CVE-2026-65970 OpenImageIO: OpenImageIO: Denial of Service via crafted TIFF image processing
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 toolset for image file manipulation. A remote attacker could exploit this vulnerability by providing a specially crafted ZIP-compressed TIFF image file. When processed with TIFF multithreading enabled, the software can prematurely release memory while background tasks are still active. This leads to worker tasks attempting to access deallocated memory, resulting in a system crash and a denial of service.
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Bug Depends On: 2539201, 2539203, 2539205    
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Description OSIDB Bzimport 2026-09-22 17:18:58 UTC 
OpenImageIO is a toolset for reading, writing, and manipulating image files of any image file format relevant to VFX / animation. Prior to 3.1.16.0, a crafted ZIP-compressed TIFF processed with TIFF multithreading enabled can make TIFFInput::read_native_scanlines() return through an error path while asynchronous strip-decompression work remains queued. Because task_set is declared before ok and compressed_scratch, those captured objects are destroyed before the task-set destructor waits, allowing worker tasks to use stale stack and heap storage, resulting in a use-after-scope crash and denial of service. The affected implementation is identified by src/tiff.imageio/tiffinput.cpp, TIFFInput::read_native_scanlines(), task_set, ok, compressed_scratch, and uncompress_one_strip(), which define the relevant source path, functions, state, and trigger. This issue is fixed in 3.1.16.0.