{
  "fix": "libgcrypt20 1.8.1-4ubuntu1.3",
  "url": "https://patchblox.com/security/fix/linux/ubuntu-bionic-libgcrypt20-1.8.1-4ubuntu1.3",
  "summary": "libgcrypt20 1.8.1-4ubuntu1.3, released September 6, 2021, fixes 2 CVEs in libgcrypt20. None of them is reported as exploited. Patch Radar priority: High. The product is no longer supported.",
  "platform": "linux",
  "type": "package",
  "title": "libgcrypt20 1.8.1-4ubuntu1.3 for Ubuntu 18.04.6 LTS (bionic)",
  "released": "2021-09-06T12:15:00Z",
  "priority": "High",
  "priorityTier": 3,
  "priorityReason": "Closes CVE-2021-33560, high severity",
  "supported": false,
  "cveCount": 2,
  "exploitedCveCount": 0,
  "kevCveCount": 0,
  "ransomwareCveCount": 0,
  "maxEpss": 0.0237,
  "maxCvss": 7.5,
  "appliesTo": [
    {
      "product": "libgcrypt20",
      "productUrl": "https://patchblox.com/security/product/linux/libgcrypt20",
      "release": "Ubuntu 18.04.6 LTS (bionic)",
      "fixedVersion": "1.8.1-4ubuntu1.3",
      "supported": true
    }
  ],
  "cves": [
    {
      "cveId": "CVE-2021-33560",
      "url": "https://patchblox.com/security/cve/CVE-2021-33560",
      "title": "Libgcrypt before 1.8.8 and 1.9.x before 1.9.3 mishandles ElGamal encryption because it lacks exponent blinding to address a side-channel attack against mpi_powm and the window size is not chosen appropriately. This for example affects use of ElGamal in OpenPGP.",
      "priority": "High",
      "severity": "Important",
      "cvss": 7.5,
      "epss": 0.0237,
      "kev": false,
      "ransomware": false,
      "exploited": false,
      "disclosed": false
    },
    {
      "cveId": "CVE-2021-40528",
      "url": "https://patchblox.com/security/cve/CVE-2021-40528",
      "title": "libgcrypt20: The ElGamal implementation in Libgcrypt before 1.9.4 allows plaintextrecovery because, during interaction between two...",
      "priority": "Routine",
      "severity": "Medium",
      "cvss": 5.9,
      "epss": 0.01423,
      "kev": false,
      "ransomware": false,
      "exploited": false,
      "disclosed": false
    }
  ],
  "dataAsOf": "2026-11-11T13:47:35Z",
  "attribution": {
    "text": "Data: Patchblox Patch Radar",
    "url": "https://patchblox.com/security/patch-radar",
    "terms": "https://patchblox.com/security/patch-radar/use-the-data"
  }
}