{
  "fix": "libvirt-bin 4.0.0-1ubuntu8.21",
  "url": "https://patchblox.com/security/fix/linux/ubuntu-bionic-libvirt-bin-4.0.0-1ubuntu8.21",
  "summary": "libvirt-bin 4.0.0-1ubuntu8.21, released March 25, 2022, fixes 5 CVEs in libvirt-bin. None of them is reported as exploited. Patch Radar priority: High. The product is no longer supported.",
  "platform": "linux",
  "type": "package",
  "title": "libvirt-bin 4.0.0-1ubuntu8.21 for Ubuntu 18.04.6 LTS (bionic)",
  "released": "2022-03-25T12:15:00Z",
  "priority": "High",
  "priorityTier": 3,
  "priorityReason": "Closes CVE-2021-3975, high severity",
  "supported": false,
  "cveCount": 5,
  "exploitedCveCount": 0,
  "kevCveCount": 0,
  "ransomwareCveCount": 0,
  "maxEpss": 0.01737,
  "maxCvss": 7.8,
  "appliesTo": [
    {
      "product": "libvirt-bin",
      "productUrl": "https://patchblox.com/security/product/linux/libvirt-bin",
      "release": "Ubuntu 18.04.6 LTS (bionic)",
      "fixedVersion": "4.0.0-1ubuntu8.21",
      "supported": true
    }
  ],
  "cves": [
    {
      "cveId": "CVE-2021-3975",
      "url": "https://patchblox.com/security/cve/CVE-2021-3975",
      "title": "libvirt: libvirt: segmentation fault during VM shutdown can lead to vdsm hang",
      "priority": "High",
      "severity": "moderate",
      "cvss": 7.8,
      "epss": 0.01737,
      "kev": false,
      "ransomware": false,
      "exploited": false,
      "disclosed": false
    },
    {
      "cveId": "CVE-2022-0897",
      "url": "https://patchblox.com/security/cve/CVE-2022-0897",
      "title": "hivex: ELSA-2022-9460: kvm_utils security update (IMPORTANT)",
      "priority": "Routine",
      "severity": "IMPORTANT",
      "cvss": 5.5,
      "epss": 0.01049,
      "kev": false,
      "ransomware": false,
      "exploited": false,
      "disclosed": false
    },
    {
      "cveId": "CVE-2020-25637",
      "url": "https://patchblox.com/security/cve/CVE-2020-25637",
      "title": "hivex: ELSA-2021-1762: virt:ol and virt-devel:rhel security, bug fix, and enhancement update (MODERATE)",
      "priority": "Routine",
      "severity": "MODERATE",
      "cvss": 6.7,
      "epss": 0.00529,
      "kev": false,
      "ransomware": false,
      "exploited": false,
      "disclosed": false
    },
    {
      "cveId": "CVE-2021-3631",
      "url": "https://patchblox.com/security/cve/CVE-2021-3631",
      "title": "libnss-libvirt: A flaw was found in libvirt while it generates SELinux MCS category pairsfor VMs\u0027 dynamic labels",
      "priority": "Routine",
      "severity": "Negligible",
      "cvss": 6.3,
      "epss": 0.00493,
      "kev": false,
      "ransomware": false,
      "exploited": false,
      "disclosed": false
    },
    {
      "cveId": "CVE-2021-4147",
      "url": "https://patchblox.com/security/cve/CVE-2021-4147",
      "title": "libvirt: A flaw was found in the libvirt libxl driver",
      "priority": "Routine",
      "severity": "medium",
      "cvss": 6.5,
      "epss": 0.00244,
      "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"
  }
}