{
  "cveId": "CVE-2021-24031",
  "url": "https://patchblox.com/security/cve/CVE-2021-24031",
  "summary": "CVE-2021-24031 is fixed in 2 products on 1 platform, first by libzstd1 1.3.3\u002Bdfsg-2ubuntu1.2, released February 19, 2021. It is not reported as exploited. Patch Radar priority: Routine.",
  "title": "libzstd1: In the Zstandard command-line utility prior to v1.4.1, output files were created with default permissions",
  "description": "In the Zstandard command-line utility prior to v1.4.1, output files were created with default permissions. Correct file permissions (matching the input) would only be set at completion time. Output files could therefore be readable or writable to unintended parties.",
  "published": "2021-02-09T16:00:00Z",
  "severity": "Medium",
  "epss": 0.00465,
  "epssPercentile": 0.40528,
  "priority": "Routine",
  "priorityTier": 4,
  "exploited": false,
  "vendorExploited": false,
  "disclosed": false,
  "fixes": [
    {
      "platform": "linux",
      "product": "libzstd1",
      "release": "Ubuntu 18.04.6 LTS (bionic)",
      "fixedVersion": "1.3.3\u002Bdfsg-2ubuntu1.2",
      "fix": "libzstd1 1.3.3\u002Bdfsg-2ubuntu1.2",
      "url": "https://patchblox.com/security/fix/linux/ubuntu-bionic-libzstd1-1.3.3-dfsg-2ubuntu1.2",
      "released": "2021-02-19T16:00:00Z"
    },
    {
      "platform": "linux",
      "product": "libzstd1",
      "release": "Ubuntu 20.04 LTS (focal)",
      "fixedVersion": "1.4.4\u002Bdfsg-3ubuntu0.1",
      "fix": "libzstd1 1.4.4\u002Bdfsg-3ubuntu0.1",
      "url": "https://patchblox.com/security/fix/linux/ubuntu-focal-libzstd1-1.4.4-dfsg-3ubuntu0.1",
      "released": "2021-02-19T16:00:00Z"
    },
    {
      "platform": "linux",
      "product": "zstd",
      "release": "Ubuntu 18.04.6 LTS (bionic)",
      "fixedVersion": "1.3.3\u002Bdfsg-2ubuntu1.2",
      "fix": "zstd 1.3.3\u002Bdfsg-2ubuntu1.2",
      "url": "https://patchblox.com/security/fix/linux/ubuntu-bionic-zstd-1.3.3-dfsg-2ubuntu1.2",
      "released": "2021-02-19T16:00:00Z"
    },
    {
      "platform": "linux",
      "product": "zstd",
      "release": "Ubuntu 20.04 LTS (focal)",
      "fixedVersion": "1.4.4\u002Bdfsg-3ubuntu0.1",
      "fix": "zstd 1.4.4\u002Bdfsg-3ubuntu0.1",
      "url": "https://patchblox.com/security/fix/linux/ubuntu-focal-zstd-1.4.4-dfsg-3ubuntu0.1",
      "released": "2021-02-19T16:00:00Z"
    }
  ],
  "noFixYet": [],
  "dataAsOf": "2026-11-08T13:06:02Z",
  "attribution": {
    "text": "Data: Patchblox Patch Radar",
    "url": "https://patchblox.com/security/patch-radar",
    "terms": "https://patchblox.com/security/patch-radar/use-the-data"
  }
}