{
  "cveId": "CVE-2026-77118",
  "url": "https://patchblox.com/security/cve/CVE-2026-77118",
  "summary": "CVE-2026-77118 is fixed in 11 products on 1 platform, first by ALAS2023-2026-1960, released July 20, 2026. It is not reported as exploited. Patch Radar priority: High.",
  "title": "graphicsmagick: A heap out-of-bounds write exists in the Photo CD (PCD) decoder of GraphicsMagick",
  "description": "A heap out-of-bounds write exists in the Photo CD (PCD) decoder of GraphicsMagick. In DecodeImage() (coders/pcd.c), the Huffman delta loop advances its output pointer with q\u002B\u002B after every decoded delta and never checks it against the end of the heap-allocated luma/chroma plane buffers. The pointer is repositioned only when a sync marker introduces a new plane/row; between sync markers the run length is bounded solely by the input.    A crafted PCD file that positions the pointer near the end of a plane and then supplies a long run of deltas with no intervening sync therefore walks the pointer past the end of the allocation and writes through it. Processing an untrusted PCD file \u2014 for example with gm convert or gm identify, or through any application linked against libGraphicsMagick \u2014 can corrupt heap memory beyond the buffers.",
  "published": "2026-07-20T09:00:00Z",
  "severity": "important",
  "epss": 0.00171,
  "epssPercentile": 0.06556,
  "priority": "High",
  "priorityTier": 3,
  "exploited": false,
  "vendorExploited": false,
  "disclosed": false,
  "fixes": [
    {
      "platform": "linux",
      "product": "GraphicsMagick",
      "release": "amzn 2023",
      "fixedVersion": "1.3.45-1.amzn2023.0.3",
      "fix": "ALAS2023-2026-1960",
      "url": "https://patchblox.com/security/fix/linux/alas2023-2026-1960",
      "released": "2026-07-20T09:00:00Z"
    },
    {
      "platform": "linux",
      "product": "GraphicsMagick-c\u002B\u002B",
      "release": "amzn 2023",
      "fixedVersion": "1.3.45-1.amzn2023.0.3",
      "fix": "ALAS2023-2026-1960",
      "url": "https://patchblox.com/security/fix/linux/alas2023-2026-1960",
      "released": "2026-07-20T09:00:00Z"
    },
    {
      "platform": "linux",
      "product": "GraphicsMagick-c\u002B\u002B-debuginfo",
      "release": "amzn 2023",
      "fixedVersion": "1.3.45-1.amzn2023.0.3",
      "fix": "ALAS2023-2026-1960",
      "url": "https://patchblox.com/security/fix/linux/alas2023-2026-1960",
      "released": "2026-07-20T09:00:00Z"
    },
    {
      "platform": "linux",
      "product": "GraphicsMagick-c\u002B\u002B-devel",
      "release": "amzn 2023",
      "fixedVersion": "1.3.45-1.amzn2023.0.3",
      "fix": "ALAS2023-2026-1960",
      "url": "https://patchblox.com/security/fix/linux/alas2023-2026-1960",
      "released": "2026-07-20T09:00:00Z"
    },
    {
      "platform": "linux",
      "product": "GraphicsMagick-debuginfo",
      "release": "amzn 2023",
      "fixedVersion": "1.3.45-1.amzn2023.0.3",
      "fix": "ALAS2023-2026-1960",
      "url": "https://patchblox.com/security/fix/linux/alas2023-2026-1960",
      "released": "2026-07-20T09:00:00Z"
    },
    {
      "platform": "linux",
      "product": "GraphicsMagick-debugsource",
      "release": "amzn 2023",
      "fixedVersion": "1.3.45-1.amzn2023.0.3",
      "fix": "ALAS2023-2026-1960",
      "url": "https://patchblox.com/security/fix/linux/alas2023-2026-1960",
      "released": "2026-07-20T09:00:00Z"
    },
    {
      "platform": "linux",
      "product": "GraphicsMagick-devel",
      "release": "amzn 2023",
      "fixedVersion": "1.3.45-1.amzn2023.0.3",
      "fix": "ALAS2023-2026-1960",
      "url": "https://patchblox.com/security/fix/linux/alas2023-2026-1960",
      "released": "2026-07-20T09:00:00Z"
    },
    {
      "platform": "linux",
      "product": "GraphicsMagick-doc",
      "release": "amzn 2023",
      "fixedVersion": "1.3.45-1.amzn2023.0.3",
      "fix": "ALAS2023-2026-1960",
      "url": "https://patchblox.com/security/fix/linux/alas2023-2026-1960",
      "released": "2026-07-20T09:00:00Z"
    },
    {
      "platform": "linux",
      "product": "GraphicsMagick-perl",
      "release": "amzn 2023",
      "fixedVersion": "1.3.45-1.amzn2023.0.3",
      "fix": "ALAS2023-2026-1960",
      "url": "https://patchblox.com/security/fix/linux/alas2023-2026-1960",
      "released": "2026-07-20T09:00:00Z"
    },
    {
      "platform": "linux",
      "product": "GraphicsMagick-perl-debuginfo",
      "release": "amzn 2023",
      "fixedVersion": "1.3.45-1.amzn2023.0.3",
      "fix": "ALAS2023-2026-1960",
      "url": "https://patchblox.com/security/fix/linux/alas2023-2026-1960",
      "released": "2026-07-20T09:00:00Z"
    },
    {
      "platform": "linux",
      "product": "graphicsmagick",
      "release": "Debian 14",
      "fixedVersion": "1.4\u002Breally1.3.48-1",
      "fix": "DEBIAN-CVE-2026-77118",
      "url": "https://patchblox.com/security/fix/linux/debian-cve-2026-77118",
      "released": "2026-08-20T23:27:07Z"
    }
  ],
  "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"
  }
}