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Vulnerability · Published Sep 18, 2026 · Assigned by GitHub_M

CVE-2026-65969OpenImageIO: TGA-to-GIF palette split signed overflow causes SIGSEGV

Medium 5.5

In plain English

A medium-severity out-of-bounds read in OpenImageIO from AcademySoftwareFoundation. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.2% (higher than 9% of all known vulnerabilities). Fixed versions are available - upgrade the affected package.

Severity (CVSS 3.1)5.5Medium
Exploit odds (30 days)0.2%top 90.6% of all CVEs
Exploited in the wildNo reportsCISA SSVC: none
Attack toolingNoneno public tooling known

Official 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 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.

Affected packages & fixed versions

EcosystemPackageFixed inAdvisory
Debian:12openimageiono fix listedDEBIAN-CVE-2026-65969
Debian:13openimageiono fix listedDEBIAN-CVE-2026-65969
Debian:14openimageio3.1.18.0+dfsg-2DEBIAN-CVE-2026-65969
Ubuntu:22.04:LTSopenimageiono fix listedUBUNTU-CVE-2026-65969
Ubuntu:26.10openimageiono fix listedUBUNTU-CVE-2026-65969

Affected products (as reported)

VendorProductVersions
AcademySoftwareFoundation OpenImageIO < 3.0.21.0>= 3.1.0.0, < 3.1.16.0>= 3.2.0.0-dev, < 3.2.0.3-beta1

Weakness: CWE-125, CWE-190 · Vector: CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H

References