{
  "id": "cve-2021-3493",
  "cveID": "CVE-2021-3493",
  "vendor": "Linux",
  "product": "Kernel",
  "vulnerabilityName": "Linux Kernel Privilege Escalation Vulnerability",
  "shortDescription": "The overlayfs stacking file system in Linux kernel does not properly validate the application of file capabilities against user namespaces, which could lead to privilege escalation.",
  "requiredAction": "Apply updates per vendor instructions.",
  "dateAdded": "2022-10-20",
  "dueDate": "2022-11-10",
  "knownRansomware": false,
  "cwes": [
    "CWE-862"
  ],
  "notes": "https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=7c03e2cda4a584cadc398e8f6641ca9988a39d52; https://nvd.nist.gov/vuln/detail/CVE-2021-3493",
  "sources": [
    {
      "label": "NVD",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2021-3493"
    },
    {
      "label": "CISA KEV",
      "url": "https://www.cisa.gov/known-exploited-vulnerabilities-catalog"
    },
    {
      "label": "git.kernel.org",
      "url": "https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=7c03e2cda4a584cadc398e8f6641ca9988a39d52"
    },
    {
      "label": "nvd.nist.gov",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2021-3493"
    }
  ],
  "cvss": {
    "score": 7.8,
    "severity": "HIGH",
    "version": "3.1",
    "vector": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H"
  },
  "epss": {
    "score": 0.49166,
    "percentile": 0.9881
  },
  "timeline": [
    {
      "date": "2022-10-20",
      "event": "Added to the CISA KEV catalog"
    },
    {
      "date": "2022-11-10",
      "event": "CISA remediation due date (BOD 22-01)"
    }
  ],
  "status": "past due"
}