{
  "fix": "expat 2.4.3-1",
  "url": "https://patchblox.com/security/fix/linux/ubuntu-plucky-expat-2.4.3-1",
  "summary": "expat 2.4.3-1, released January 16, 2026, fixes 8 CVEs in expat. None of them is reported as exploited. Patch Radar priority: High. The product is no longer supported.",
  "platform": "linux",
  "type": "package",
  "title": "expat 2.4.3-1 for Ubuntu 25.04 (plucky)",
  "released": "2026-01-16T01:42:24Z",
  "priority": "High",
  "priorityTier": 3,
  "priorityReason": "Closes CVE-2022-22822, high severity",
  "supported": false,
  "cveCount": 8,
  "exploitedCveCount": 0,
  "kevCveCount": 0,
  "ransomwareCveCount": 0,
  "maxEpss": 0.0548,
  "maxCvss": 9.8,
  "appliesTo": [
    {
      "product": "expat",
      "productUrl": "https://patchblox.com/security/product/linux/expat",
      "release": "Ubuntu 25.04 (plucky)",
      "fixedVersion": "2.4.3-1",
      "supported": true
    }
  ],
  "cves": [
    {
      "cveId": "CVE-2022-22822",
      "url": "https://patchblox.com/security/cve/CVE-2022-22822",
      "title": "xul-ext-lightning: addBinding in xmlparse.c in Expat (aka libexpat) before 2.4.3 has an integer overflow.",
      "priority": "High",
      "severity": "Medium",
      "cvss": 9.8,
      "epss": 0.0548,
      "kev": false,
      "ransomware": false,
      "exploited": false,
      "disclosed": false
    },
    {
      "cveId": "CVE-2021-45960",
      "url": "https://patchblox.com/security/cve/CVE-2021-45960",
      "title": "expat: In Expat (aka libexpat) before 2.4.3, a left shift by 29 (or more) placesin the storeAtts function in xmlparse.c can...",
      "priority": "High",
      "severity": "Low",
      "cvss": 9.8,
      "epss": 0.04672,
      "kev": false,
      "ransomware": false,
      "exploited": false,
      "disclosed": false
    },
    {
      "cveId": "CVE-2021-46143",
      "url": "https://patchblox.com/security/cve/CVE-2021-46143",
      "title": "expat: In doProlog in xmlparse.c in Expat (aka libexpat) before 2.4.3, an integeroverflow exists for m_groupSize.",
      "priority": "High",
      "severity": "Medium",
      "cvss": 9.8,
      "epss": 0.04465,
      "kev": false,
      "ransomware": false,
      "exploited": false,
      "disclosed": false
    },
    {
      "cveId": "CVE-2022-22823",
      "url": "https://patchblox.com/security/cve/CVE-2022-22823",
      "title": "thunderbird-mozsymbols: build_model in xmlparse.c in Expat (aka libexpat) before 2.4.3 has an integer overflow.",
      "priority": "High",
      "severity": "Medium",
      "cvss": 9.8,
      "epss": 0.03866,
      "kev": false,
      "ransomware": false,
      "exploited": false,
      "disclosed": false
    },
    {
      "cveId": "CVE-2022-22824",
      "url": "https://patchblox.com/security/cve/CVE-2022-22824",
      "title": "expat: defineAttribute in xmlparse.c in Expat (aka libexpat) before 2.4.3 has an integer overflow.",
      "priority": "High",
      "severity": "Medium",
      "cvss": 9.8,
      "epss": 0.03866,
      "kev": false,
      "ransomware": false,
      "exploited": false,
      "disclosed": false
    },
    {
      "cveId": "CVE-2022-22826",
      "url": "https://patchblox.com/security/cve/CVE-2022-22826",
      "title": "libxmltok1: nextScaffoldPart in xmlparse.c in Expat (aka libexpat) before 2.4.3 has an integer overflow.",
      "priority": "High",
      "severity": "Medium",
      "cvss": 9.8,
      "epss": 0.03182,
      "kev": false,
      "ransomware": false,
      "exploited": false,
      "disclosed": false
    },
    {
      "cveId": "CVE-2022-22827",
      "url": "https://patchblox.com/security/cve/CVE-2022-22827",
      "title": "thunderbird-gnome-support: storeAtts in xmlparse.c in Expat (aka libexpat) before 2.4.3 has an integer overflow.",
      "priority": "High",
      "severity": "Medium",
      "cvss": 9.8,
      "epss": 0.03182,
      "kev": false,
      "ransomware": false,
      "exploited": false,
      "disclosed": false
    },
    {
      "cveId": "CVE-2022-22825",
      "url": "https://patchblox.com/security/cve/CVE-2022-22825",
      "title": "libxmltok1: lookup in xmlparse.c in Expat (aka libexpat) before 2.4.3 has an integer overflow.",
      "priority": "High",
      "severity": "Medium",
      "cvss": 9.8,
      "epss": 0.02994,
      "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"
  }
}