{
  "fix": "libzmq5 4.3.2-2ubuntu1.20.04.1~esm2",
  "url": "https://patchblox.com/security/fix/linux/ubuntu-focal-libzmq5-4.3.2-2ubuntu1.20.04.1-esm2",
  "summary": "libzmq5 4.3.2-2ubuntu1.20.04.1~esm2, released May 28, 2021, fixes 3 CVEs in libzmq5. None of them is reported as exploited. Patch Radar priority: Routine. The product is no longer supported.",
  "platform": "linux",
  "type": "package",
  "title": "libzmq5 4.3.2-2ubuntu1.20.04.1~esm2 for Ubuntu 20.04 LTS (focal)",
  "released": "2021-05-28T04:15:00Z",
  "priority": "Routine",
  "priorityTier": 4,
  "priorityReason": "Closes 3 CVEs, none high severity",
  "supported": false,
  "cveCount": 3,
  "exploitedCveCount": 0,
  "kevCveCount": 0,
  "ransomwareCveCount": 0,
  "maxEpss": 0.43862,
  "appliesTo": [
    {
      "product": "libzmq5",
      "productUrl": "https://patchblox.com/security/product/linux/libzmq5",
      "release": "Ubuntu 20.04 LTS (focal)",
      "fixedVersion": "4.3.2-2ubuntu1.20.04.1~esm2",
      "supported": true
    }
  ],
  "cves": [
    {
      "cveId": "CVE-2021-20235",
      "url": "https://patchblox.com/security/cve/CVE-2021-20235",
      "title": "libzmq5: There\u0027s a flaw in the zeromq server in versions before 4.3.3 in src/decoder_allocators.hpp",
      "priority": "Routine",
      "severity": "Medium",
      "epss": 0.43862,
      "kev": false,
      "ransomware": false,
      "exploited": false,
      "disclosed": false
    },
    {
      "cveId": "CVE-2021-20237",
      "url": "https://patchblox.com/security/cve/CVE-2021-20237",
      "title": "libzmq5: An uncontrolled resource consumption (memory leak) flaw was found in ZeroMQ\u0027s src/xpub.cpp in versions before 4.3.3",
      "priority": "Routine",
      "severity": "Low",
      "epss": 0.01694,
      "kev": false,
      "ransomware": false,
      "exploited": false,
      "disclosed": false
    },
    {
      "cveId": "CVE-2021-20234",
      "url": "https://patchblox.com/security/cve/CVE-2021-20234",
      "title": "libzmq5: An uncontrolled resource consumption (memory leak) flaw was found in the ZeroMQ client in versions before 4.3.3 in sr...",
      "priority": "Routine",
      "severity": "Low",
      "epss": 0.01073,
      "kev": false,
      "ransomware": false,
      "exploited": false,
      "disclosed": false
    }
  ],
  "dataAsOf": "2026-11-14T02:05:58Z",
  "attribution": {
    "text": "Data: Patchblox Patch Radar",
    "url": "https://patchblox.com/security/patch-radar",
    "terms": "https://patchblox.com/security/patch-radar/use-the-data"
  }
}