{
  "cveId": "CVE-2021-45464",
  "url": "https://patchblox.com/security/cve/CVE-2021-45464",
  "summary": "CVE-2021-45464 is fixed in kvmtool on 1 platform, first by kvmtool 0.20170904-1ubuntu0.18.04.1~esm1, released June 29, 2023. It is not reported as exploited. Patch Radar priority: High.",
  "title": "kvmtool: kvmtool through 39181fc allows an out-of-bounds write, related to virtio/balloon.c and virtio/pci.c",
  "description": "kvmtool through 39181fc allows an out-of-bounds write, related to virtio/balloon.c and virtio/pci.c. This allows a guest OS user to execute arbitrary code on the host machine.",
  "published": "2023-04-15T16:15:00Z",
  "severity": "High",
  "epss": 0.00378,
  "epssPercentile": 0.32055,
  "priority": "High",
  "priorityTier": 3,
  "exploited": false,
  "vendorExploited": false,
  "disclosed": false,
  "fixes": [
    {
      "platform": "linux",
      "product": "kvmtool",
      "release": "Ubuntu 18.04.6 LTS (bionic)",
      "fixedVersion": "0.20170904-1ubuntu0.18.04.1~esm1",
      "fix": "kvmtool 0.20170904-1ubuntu0.18.04.1~esm1",
      "url": "https://patchblox.com/security/fix/linux/ubuntu-bionic-kvmtool-0.20170904-1ubuntu0.18.04.1-esm1",
      "released": "2023-06-29T17:00:00Z"
    },
    {
      "platform": "linux",
      "product": "kvmtool",
      "release": "Ubuntu 20.04 LTS (focal)",
      "fixedVersion": "0.20170904-1ubuntu0.20.04.1~esm1",
      "fix": "kvmtool 0.20170904-1ubuntu0.20.04.1~esm1",
      "url": "https://patchblox.com/security/fix/linux/ubuntu-focal-kvmtool-0.20170904-1ubuntu0.20.04.1-esm1",
      "released": "2023-06-29T17:00:00Z"
    },
    {
      "platform": "linux",
      "product": "kvmtool",
      "release": "Ubuntu 22.04.1 LTS (jammy)",
      "fixedVersion": "0.20170904-1.1ubuntu0.1~esm2",
      "fix": "kvmtool 0.20170904-1.1ubuntu0.1~esm2",
      "url": "https://patchblox.com/security/fix/linux/ubuntu-jammy-kvmtool-0.20170904-1.1ubuntu0.1-esm2",
      "released": "2023-06-29T17:00:00Z"
    }
  ],
  "noFixYet": [],
  "dataAsOf": "2026-11-09T01:18:40Z",
  "attribution": {
    "text": "Data: Patchblox Patch Radar",
    "url": "https://patchblox.com/security/patch-radar",
    "terms": "https://patchblox.com/security/patch-radar/use-the-data"
  }
}