{
  "cveId": "CVE-2026-63638",
  "url": "https://patchblox.com/security/cve/CVE-2026-63638",
  "summary": "CVE-2026-63638 is fixed in openimageio on 1 platform by DEBIAN-CVE-2026-63638 (version 3.1.18.0\u002Bdfsg-2), released October 13, 2026. It is not reported as exploited. Patch Radar priority: High.",
  "title": "openimageio: OpenImageIO is a toolset for reading, writing, and manipulating image files of any image file format relevant to VFX...",
  "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 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.",
  "published": "2026-09-18T16:17:08Z",
  "severity": "high",
  "cvss": 8.3,
  "cvssVector": "CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:H/A:H",
  "epss": 0.00464,
  "epssPercentile": 0.40485,
  "priority": "High",
  "priorityTier": 3,
  "exploited": false,
  "vendorExploited": false,
  "disclosed": false,
  "fixes": [
    {
      "platform": "linux",
      "product": "openimageio",
      "release": "Debian 14",
      "fixedVersion": "3.1.18.0\u002Bdfsg-2",
      "fix": "DEBIAN-CVE-2026-63638",
      "url": "https://patchblox.com/security/fix/linux/debian-cve-2026-63638",
      "released": "2026-10-13T23:28:43Z"
    }
  ],
  "noFixYet": [],
  "dataAsOf": "2026-11-10T01:44:33Z",
  "attribution": {
    "text": "Data: Patchblox Patch Radar",
    "url": "https://patchblox.com/security/patch-radar",
    "terms": "https://patchblox.com/security/patch-radar/use-the-data"
  }
}