Bug 2538871 (CVE-2026-65969)

Summary: CVE-2026-65969 OpenImageIO: OpenImageIO: Denial of Service via local processing of truncated TGA image
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 local attacker could trick a user into processing a specially crafted truncated TGA image. This could lead to a signed overflow in the `gifsplitpalette()` function, corrupting internal data and causing an out-of-bounds read. The result is a process crash and a denial of service (DoS) for the affected system.
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Bug Depends On: 2539195, 2539197, 2539199    
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Description OSIDB Bzimport 2026-09-22 21:00:27 UTC 
OpenImageIO is a toolset for reading, writing, and manipulating image files of any image file format relevant to VFX / animation. Prior to 3.0.21.0, 3.1.16.0, and 3.2.0.3-beta1, A truncated tga can leave a pending gif frame that is processed during output close. gifsplitpalette() computes numpixels multiplied by the palette partition width in signed 32-bit arithmetic; a large image overflows that intermediate, corrupts subpixelsa, and drives an out-of-bounds read while building the gif palette, resulting in a process crash and denial of service. The affected implementation is identified by src/gif.imageio/gif.h, GifSplitPalette(), numPixels, subPixelsA, GIFOutput, and truncated TGA input, 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.