Skip to main content
← All vulnerabilities
CVE-2026-63638

OpenImageIO: Cineon invalid bit depth heap out-of-bounds write

Published
Last modified
published
Not listed in CISA KEV
Fix
Fixed in 3.0.21.0, 3.1.16.0, 3.2.0.3-beta1
None on Exploit-DB, Metasploit or GitHub
  • Exploitation: poc
  • Automatable: no
  • Technical impact: partial

Summary

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 crafted cineon image can declare unsupported component bit depth 26. cineoninput::open() maps it to a 32-bit imagespec, but libcineon maps the unsupported depth to an 8-byte value, so cineoninput::read_native_scanline() causes attacker-controlled data to be written beyond the 4-byte-per-pixel caller buffer, resulting in a heap out-of-bounds write and memory corruption. The affected implementation is identified by src/cineon.imageio/cineoninput.cpp, CineonInput::open(), CineonInput::read_native_scanline(), ComponentDataSize(), bit depth 26, and ImageSpec, 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.

Timeline

  1. CVE published
  2. CISA SSVC assessment

    Exploitation: poc · Automatable: no · Technical impact: partial

  3. Record last updated

Affected versions

  • AcademySoftwareFoundation OpenImageIO

    fixed in 3.0.21.0; From 3.1.0.0 · fixed in 3.1.16.0; From 3.2.0.0-dev · fixed in 3.2.0.3-beta1

References 5

GitHub · AcademySoftwareFoundation/OpenImageIO