{
  "cveId": "CVE-2021-36978",
  "url": "https://patchblox.com/security/cve/CVE-2021-36978",
  "summary": "CVE-2021-36978 is fixed in 3 products on 1 platform, first by libqpdf21 8.0.2-3ubuntu0.1, released August 11, 2023. It is not reported as exploited. Patch Radar priority: Routine.",
  "title": "qpdf: QPDF 9.x through 9.1.1 and 10.x through 10.0.4 has a heap-based buffer overflow in Pl_ASCII85Decoder::write (called f...",
  "description": "QPDF 9.x through 9.1.1 and 10.x through 10.0.4 has a heap-based buffer overflow in Pl_ASCII85Decoder::write (called from Pl_AES_PDF::flush and Pl_AES_PDF::finish) when a certain downstream write fails.",
  "published": "2021-07-20T00:15:00Z",
  "severity": "Medium",
  "epss": 0.01272,
  "epssPercentile": 0.70042,
  "priority": "Routine",
  "priorityTier": 4,
  "exploited": false,
  "vendorExploited": false,
  "disclosed": false,
  "fixes": [
    {
      "platform": "linux",
      "product": "libqpdf21",
      "release": "Ubuntu 18.04.6 LTS (bionic)",
      "fixedVersion": "8.0.2-3ubuntu0.1",
      "fix": "libqpdf21 8.0.2-3ubuntu0.1",
      "url": "https://patchblox.com/security/fix/linux/ubuntu-bionic-libqpdf21-8.0.2-3ubuntu0.1",
      "released": "2023-08-11T07:15:00Z"
    },
    {
      "platform": "linux",
      "product": "libqpdf26",
      "release": "Ubuntu 20.04 LTS (focal)",
      "fixedVersion": "9.1.1-1ubuntu0.1",
      "fix": "libqpdf26 9.1.1-1ubuntu0.1",
      "url": "https://patchblox.com/security/fix/linux/ubuntu-focal-libqpdf26-9.1.1-1ubuntu0.1",
      "released": "2023-08-11T07:15:00Z"
    },
    {
      "platform": "linux",
      "product": "qpdf",
      "release": "Ubuntu 18.04.6 LTS (bionic)",
      "fixedVersion": "8.0.2-3ubuntu0.1",
      "fix": "qpdf 8.0.2-3ubuntu0.1",
      "url": "https://patchblox.com/security/fix/linux/ubuntu-bionic-qpdf-8.0.2-3ubuntu0.1",
      "released": "2023-08-11T07:15:00Z"
    },
    {
      "platform": "linux",
      "product": "qpdf",
      "release": "Ubuntu 20.04 LTS (focal)",
      "fixedVersion": "9.1.1-1ubuntu0.1",
      "fix": "qpdf 9.1.1-1ubuntu0.1",
      "url": "https://patchblox.com/security/fix/linux/ubuntu-focal-qpdf-9.1.1-1ubuntu0.1",
      "released": "2023-08-11T07:15:00Z"
    }
  ],
  "noFixYet": [],
  "dataAsOf": "2026-11-09T07:25:28Z",
  "attribution": {
    "text": "Data: Patchblox Patch Radar",
    "url": "https://patchblox.com/security/patch-radar",
    "terms": "https://patchblox.com/security/patch-radar/use-the-data"
  }
}