{
  "fix": "liblog4j2-java 2.16.0-0.20.04.1",
  "url": "https://patchblox.com/security/fix/linux/ubuntu-focal-liblog4j2-java-2.16.0-0.20.04.1",
  "summary": "liblog4j2-java 2.16.0-0.20.04.1, released December 14, 2021, fixes 2 CVEs in liblog4j2-java. One of them is being exploited (CVE-2021-45046); 1 on CISA KEV. Patch Radar priority: Patch now. The product is no longer supported.",
  "platform": "linux",
  "type": "package",
  "title": "liblog4j2-java 2.16.0-0.20.04.1 for Ubuntu 20.04 LTS (focal)",
  "released": "2021-12-14T08:30:00Z",
  "priority": "Patch now",
  "priorityTier": 1,
  "priorityReason": "Closes CVE-2021-45046, exploited (CISA KEV, ransomware)",
  "supported": false,
  "cveCount": 2,
  "exploitedCveCount": 1,
  "kevCveCount": 1,
  "ransomwareCveCount": 1,
  "maxEpss": 0.99977,
  "maxCvss": 9,
  "appliesTo": [
    {
      "product": "liblog4j2-java",
      "productUrl": "https://patchblox.com/security/product/linux/liblog4j2-java",
      "release": "Ubuntu 20.04 LTS (focal)",
      "fixedVersion": "2.16.0-0.20.04.1",
      "supported": true
    }
  ],
  "cves": [
    {
      "cveId": "CVE-2021-45046",
      "url": "https://patchblox.com/security/cve/CVE-2021-45046",
      "title": "apache-log4j2: apache-log4j2 - security update",
      "priority": "Patch now",
      "severity": "critical",
      "cvss": 9,
      "epss": 0.99977,
      "kev": true,
      "ransomware": true,
      "exploited": true,
      "disclosed": false
    },
    {
      "cveId": "CVE-2020-9488",
      "url": "https://patchblox.com/security/cve/CVE-2020-9488",
      "title": "liblog4j2-java: Improper validation of certificate with host mismatch in Apache Log4j SMTP appender",
      "priority": "Routine",
      "severity": "Medium",
      "epss": 0.08216,
      "kev": false,
      "ransomware": false,
      "exploited": false,
      "disclosed": false
    }
  ],
  "dataAsOf": "2026-11-11T19:49:26Z",
  "attribution": {
    "text": "Data: Patchblox Patch Radar",
    "url": "https://patchblox.com/security/patch-radar",
    "terms": "https://patchblox.com/security/patch-radar/use-the-data"
  }
}