{
  "cveId": "CVE-2021-4147",
  "url": "https://patchblox.com/security/cve/CVE-2021-4147",
  "summary": "CVE-2021-4147 is fixed in 19 products on 1 platform, first by libnss-libvirt 4.0.0-1ubuntu8.21, released March 25, 2022. It is not reported as exploited. Patch Radar priority: Routine.",
  "title": "libvirt: A flaw was found in the libvirt libxl driver",
  "description": "A flaw was found in the libvirt libxl driver. A malicious guest could continuously reboot itself and cause libvirtd on the host to deadlock or crash, resulting in a denial of service condition.",
  "published": "2022-03-25T12:15:00Z",
  "severity": "medium",
  "cvss": 6.5,
  "cvssVector": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:N/I:N/A:H",
  "epss": 0.00244,
  "epssPercentile": 0.15693,
  "priority": "Routine",
  "priorityTier": 4,
  "exploited": false,
  "vendorExploited": false,
  "disclosed": false,
  "fixes": [
    {
      "platform": "linux",
      "product": "libnss-libvirt",
      "release": "Ubuntu 18.04.6 LTS (bionic)",
      "fixedVersion": "4.0.0-1ubuntu8.21",
      "fix": "libnss-libvirt 4.0.0-1ubuntu8.21",
      "url": "https://patchblox.com/security/fix/linux/ubuntu-bionic-libnss-libvirt-4.0.0-1ubuntu8.21",
      "released": "2022-03-25T12:15:00Z"
    },
    {
      "platform": "linux",
      "product": "libnss-libvirt",
      "release": "Ubuntu 20.04 LTS (focal)",
      "fixedVersion": "6.0.0-0ubuntu8.16",
      "fix": "libnss-libvirt 6.0.0-0ubuntu8.16",
      "url": "https://patchblox.com/security/fix/linux/ubuntu-focal-libnss-libvirt-6.0.0-0ubuntu8.16",
      "released": "2022-03-25T12:15:00Z"
    },
    {
      "platform": "linux",
      "product": "libvirt",
      "release": "Debian 12.15 (bookworm)",
      "fixedVersion": "7.10.0-2",
      "fix": "DEBIAN-CVE-2021-4147",
      "url": "https://patchblox.com/security/fix/linux/debian-cve-2021-4147",
      "released": "2022-03-25T19:15:09Z"
    },
    {
      "platform": "linux",
      "product": "libvirt",
      "release": "Debian 13.5 (trixie)",
      "fixedVersion": "7.10.0-2",
      "fix": "DEBIAN-CVE-2021-4147",
      "url": "https://patchblox.com/security/fix/linux/debian-cve-2021-4147",
      "released": "2022-03-25T19:15:09Z"
    },
    {
      "platform": "linux",
      "product": "libvirt",
      "release": "Debian 14",
      "fixedVersion": "7.10.0-2",
      "fix": "DEBIAN-CVE-2021-4147",
      "url": "https://patchblox.com/security/fix/linux/debian-cve-2021-4147",
      "released": "2022-03-25T19:15:09Z"
    },
    {
      "platform": "linux",
      "product": "libvirt-bin",
      "release": "Ubuntu 18.04.6 LTS (bionic)",
      "fixedVersion": "4.0.0-1ubuntu8.21",
      "fix": "libvirt-bin 4.0.0-1ubuntu8.21",
      "url": "https://patchblox.com/security/fix/linux/ubuntu-bionic-libvirt-bin-4.0.0-1ubuntu8.21",
      "released": "2022-03-25T12:15:00Z"
    },
    {
      "platform": "linux",
      "product": "libvirt-clients",
      "release": "Ubuntu 18.04.6 LTS (bionic)",
      "fixedVersion": "4.0.0-1ubuntu8.21",
      "fix": "libvirt-clients 4.0.0-1ubuntu8.21",
      "url": "https://patchblox.com/security/fix/linux/ubuntu-bionic-libvirt-clients-4.0.0-1ubuntu8.21",
      "released": "2022-03-25T12:15:00Z"
    },
    {
      "platform": "linux",
      "product": "libvirt-clients",
      "release": "Ubuntu 20.04 LTS (focal)",
      "fixedVersion": "6.0.0-0ubuntu8.16",
      "fix": "libvirt-clients 6.0.0-0ubuntu8.16",
      "url": "https://patchblox.com/security/fix/linux/ubuntu-focal-libvirt-clients-6.0.0-0ubuntu8.16",
      "released": "2022-03-25T12:15:00Z"
    },
    {
      "platform": "linux",
      "product": "libvirt-daemon",
      "release": "Ubuntu 18.04.6 LTS (bionic)",
      "fixedVersion": "4.0.0-1ubuntu8.21",
      "fix": "libvirt-daemon 4.0.0-1ubuntu8.21",
      "url": "https://patchblox.com/security/fix/linux/ubuntu-bionic-libvirt-daemon-4.0.0-1ubuntu8.21",
      "released": "2022-03-25T12:15:00Z"
    },
    {
      "platform": "linux",
      "product": "libvirt-daemon",
      "release": "Ubuntu 20.04 LTS (focal)",
      "fixedVersion": "6.0.0-0ubuntu8.16",
      "fix": "libvirt-daemon 6.0.0-0ubuntu8.16",
      "url": "https://patchblox.com/security/fix/linux/ubuntu-focal-libvirt-daemon-6.0.0-0ubuntu8.16",
      "released": "2022-03-25T12:15:00Z"
    },
    {
      "platform": "linux",
      "product": "libvirt-daemon-driver-lxc",
      "release": "Ubuntu 20.04 LTS (focal)",
      "fixedVersion": "6.0.0-0ubuntu8.16",
      "fix": "libvirt-daemon-driver-lxc 6.0.0-0ubuntu8.16",
      "url": "https://patchblox.com/security/fix/linux/ubuntu-focal-libvirt-daemon-driver-lxc-6.0.0-0ubuntu8.16",
      "released": "2022-03-25T12:15:00Z"
    },
    {
      "platform": "linux",
      "product": "libvirt-daemon-driver-qemu",
      "release": "Ubuntu 20.04 LTS (focal)",
      "fixedVersion": "6.0.0-0ubuntu8.16",
      "fix": "libvirt-daemon-driver-qemu 6.0.0-0ubuntu8.16",
      "url": "https://patchblox.com/security/fix/linux/ubuntu-focal-libvirt-daemon-driver-qemu-6.0.0-0ubuntu8.16",
      "released": "2022-03-25T12:15:00Z"
    },
    {
      "platform": "linux",
      "product": "libvirt-daemon-driver-storage-gluster",
      "release": "Ubuntu 18.04.6 LTS (bionic)",
      "fixedVersion": "4.0.0-1ubuntu8.21",
      "fix": "libvirt-daemon-driver-storage-gluster 4.0.0-1ubuntu8.21",
      "url": "https://patchblox.com/security/fix/linux/ubuntu-bionic-libvirt-daemon-driver-storage-gluster-4.0.0-1ubuntu8.21",
      "released": "2022-03-25T12:15:00Z"
    },
    {
      "platform": "linux",
      "product": "libvirt-daemon-driver-storage-gluster",
      "release": "Ubuntu 20.04 LTS (focal)",
      "fixedVersion": "6.0.0-0ubuntu8.16",
      "fix": "libvirt-daemon-driver-storage-gluster 6.0.0-0ubuntu8.16",
      "url": "https://patchblox.com/security/fix/linux/ubuntu-focal-libvirt-daemon-driver-storage-gluster-6.0.0-0ubuntu8.16",
      "released": "2022-03-25T12:15:00Z"
    },
    {
      "platform": "linux",
      "product": "libvirt-daemon-driver-storage-rbd",
      "release": "Ubuntu 18.04.6 LTS (bionic)",
      "fixedVersion": "4.0.0-1ubuntu8.21",
      "fix": "libvirt-daemon-driver-storage-rbd 4.0.0-1ubuntu8.21",
      "url": "https://patchblox.com/security/fix/linux/ubuntu-bionic-libvirt-daemon-driver-storage-rbd-4.0.0-1ubuntu8.21",
      "released": "2022-03-25T12:15:00Z"
    },
    {
      "platform": "linux",
      "product": "libvirt-daemon-driver-storage-rbd",
      "release": "Ubuntu 20.04 LTS (focal)",
      "fixedVersion": "6.0.0-0ubuntu8.16",
      "fix": "libvirt-daemon-driver-storage-rbd 6.0.0-0ubuntu8.16",
      "url": "https://patchblox.com/security/fix/linux/ubuntu-focal-libvirt-daemon-driver-storage-rbd-6.0.0-0ubuntu8.16",
      "released": "2022-03-25T12:15:00Z"
    },
    {
      "platform": "linux",
      "product": "libvirt-daemon-driver-storage-sheepdog",
      "release": "Ubuntu 18.04.6 LTS (bionic)",
      "fixedVersion": "4.0.0-1ubuntu8.21",
      "fix": "libvirt-daemon-driver-storage-sheepdog 4.0.0-1ubuntu8.21",
      "url": "https://patchblox.com/security/fix/linux/ubuntu-bionic-libvirt-daemon-driver-storage-sheepdog-4.0.0-1ubuntu8.21",
      "released": "2022-03-25T12:15:00Z"
    },
    {
      "platform": "linux",
      "product": "libvirt-daemon-driver-storage-zfs",
      "release": "Ubuntu 18.04.6 LTS (bionic)",
      "fixedVersion": "4.0.0-1ubuntu8.21",
      "fix": "libvirt-daemon-driver-storage-zfs 4.0.0-1ubuntu8.21",
      "url": "https://patchblox.com/security/fix/linux/ubuntu-bionic-libvirt-daemon-driver-storage-zfs-4.0.0-1ubuntu8.21",
      "released": "2022-03-25T12:15:00Z"
    },
    {
      "platform": "linux",
      "product": "libvirt-daemon-driver-storage-zfs",
      "release": "Ubuntu 20.04 LTS (focal)",
      "fixedVersion": "6.0.0-0ubuntu8.16",
      "fix": "libvirt-daemon-driver-storage-zfs 6.0.0-0ubuntu8.16",
      "url": "https://patchblox.com/security/fix/linux/ubuntu-focal-libvirt-daemon-driver-storage-zfs-6.0.0-0ubuntu8.16",
      "released": "2022-03-25T12:15:00Z"
    },
    {
      "platform": "linux",
      "product": "libvirt-daemon-driver-vbox",
      "release": "Ubuntu 20.04 LTS (focal)",
      "fixedVersion": "6.0.0-0ubuntu8.16",
      "fix": "libvirt-daemon-driver-vbox 6.0.0-0ubuntu8.16",
      "url": "https://patchblox.com/security/fix/linux/ubuntu-focal-libvirt-daemon-driver-vbox-6.0.0-0ubuntu8.16",
      "released": "2022-03-25T12:15:00Z"
    },
    {
      "platform": "linux",
      "product": "libvirt-daemon-driver-xen",
      "release": "Ubuntu 20.04 LTS (focal)",
      "fixedVersion": "6.0.0-0ubuntu8.16",
      "fix": "libvirt-daemon-driver-xen 6.0.0-0ubuntu8.16",
      "url": "https://patchblox.com/security/fix/linux/ubuntu-focal-libvirt-daemon-driver-xen-6.0.0-0ubuntu8.16",
      "released": "2022-03-25T12:15:00Z"
    },
    {
      "platform": "linux",
      "product": "libvirt-daemon-system",
      "release": "Ubuntu 18.04.6 LTS (bionic)",
      "fixedVersion": "4.0.0-1ubuntu8.21",
      "fix": "libvirt-daemon-system 4.0.0-1ubuntu8.21",
      "url": "https://patchblox.com/security/fix/linux/ubuntu-bionic-libvirt-daemon-system-4.0.0-1ubuntu8.21",
      "released": "2022-03-25T12:15:00Z"
    },
    {
      "platform": "linux",
      "product": "libvirt-daemon-system",
      "release": "Ubuntu 20.04 LTS (focal)",
      "fixedVersion": "6.0.0-0ubuntu8.16",
      "fix": "libvirt-daemon-system 6.0.0-0ubuntu8.16",
      "url": "https://patchblox.com/security/fix/linux/ubuntu-focal-libvirt-daemon-system-6.0.0-0ubuntu8.16",
      "released": "2022-03-25T12:15:00Z"
    },
    {
      "platform": "linux",
      "product": "libvirt-daemon-system-systemd",
      "release": "Ubuntu 20.04 LTS (focal)",
      "fixedVersion": "6.0.0-0ubuntu8.16",
      "fix": "libvirt-daemon-system-systemd 6.0.0-0ubuntu8.16",
      "url": "https://patchblox.com/security/fix/linux/ubuntu-focal-libvirt-daemon-system-systemd-6.0.0-0ubuntu8.16",
      "released": "2022-03-25T12:15:00Z"
    },
    {
      "platform": "linux",
      "product": "libvirt-daemon-system-sysv",
      "release": "Ubuntu 20.04 LTS (focal)",
      "fixedVersion": "6.0.0-0ubuntu8.16",
      "fix": "libvirt-daemon-system-sysv 6.0.0-0ubuntu8.16",
      "url": "https://patchblox.com/security/fix/linux/ubuntu-focal-libvirt-daemon-system-sysv-6.0.0-0ubuntu8.16",
      "released": "2022-03-25T12:15:00Z"
    },
    {
      "platform": "linux",
      "product": "libvirt-sanlock",
      "release": "Ubuntu 18.04.6 LTS (bionic)",
      "fixedVersion": "4.0.0-1ubuntu8.21",
      "fix": "libvirt-sanlock 4.0.0-1ubuntu8.21",
      "url": "https://patchblox.com/security/fix/linux/ubuntu-bionic-libvirt-sanlock-4.0.0-1ubuntu8.21",
      "released": "2022-03-25T12:15:00Z"
    },
    {
      "platform": "linux",
      "product": "libvirt-sanlock",
      "release": "Ubuntu 20.04 LTS (focal)",
      "fixedVersion": "6.0.0-0ubuntu8.16",
      "fix": "libvirt-sanlock 6.0.0-0ubuntu8.16",
      "url": "https://patchblox.com/security/fix/linux/ubuntu-focal-libvirt-sanlock-6.0.0-0ubuntu8.16",
      "released": "2022-03-25T12:15:00Z"
    },
    {
      "platform": "linux",
      "product": "libvirt-wireshark",
      "release": "Ubuntu 18.04.6 LTS (bionic)",
      "fixedVersion": "4.0.0-1ubuntu8.21",
      "fix": "libvirt-wireshark 4.0.0-1ubuntu8.21",
      "url": "https://patchblox.com/security/fix/linux/ubuntu-bionic-libvirt-wireshark-4.0.0-1ubuntu8.21",
      "released": "2022-03-25T12:15:00Z"
    },
    {
      "platform": "linux",
      "product": "libvirt-wireshark",
      "release": "Ubuntu 20.04 LTS (focal)",
      "fixedVersion": "6.0.0-0ubuntu8.16",
      "fix": "libvirt-wireshark 6.0.0-0ubuntu8.16",
      "url": "https://patchblox.com/security/fix/linux/ubuntu-focal-libvirt-wireshark-6.0.0-0ubuntu8.16",
      "released": "2022-03-25T12:15:00Z"
    },
    {
      "platform": "linux",
      "product": "libvirt0",
      "release": "Ubuntu 18.04.6 LTS (bionic)",
      "fixedVersion": "4.0.0-1ubuntu8.21",
      "fix": "libvirt0 4.0.0-1ubuntu8.21",
      "url": "https://patchblox.com/security/fix/linux/ubuntu-bionic-libvirt0-4.0.0-1ubuntu8.21",
      "released": "2022-03-25T12:15:00Z"
    },
    {
      "platform": "linux",
      "product": "libvirt0",
      "release": "Ubuntu 20.04 LTS (focal)",
      "fixedVersion": "6.0.0-0ubuntu8.16",
      "fix": "libvirt0 6.0.0-0ubuntu8.16",
      "url": "https://patchblox.com/security/fix/linux/ubuntu-focal-libvirt0-6.0.0-0ubuntu8.16",
      "released": "2022-03-25T12:15:00Z"
    }
  ],
  "noFixYet": [],
  "dataAsOf": "2026-11-08T00:53:09Z",
  "attribution": {
    "text": "Data: Patchblox Patch Radar",
    "url": "https://patchblox.com/security/patch-radar",
    "terms": "https://patchblox.com/security/patch-radar/use-the-data"
  }
}