{
  "schemaVersion": 1,
  "attribution": [
    {
      "source": "CISA Known Exploited Vulnerabilities",
      "url": "https://www.cisa.gov/known-exploited-vulnerabilities-catalog",
      "licence": "US government work"
    },
    {
      "source": "GitHub Advisory Database",
      "url": "https://github.com/advisories",
      "licence": "CC BY 4.0"
    },
    {
      "source": "Have I Been Pwned",
      "url": "https://haveibeenpwned.com/",
      "licence": "CC BY 4.0"
    },
    {
      "source": "CVE Program (CVE records)",
      "url": "https://www.cve.org/Legal/TermsOfUse",
      "licence": "CVE Terms of Use",
      "notice": "Copyright © 1999-2026, The MITRE Corporation. CVE is a trademark and the CVE logo is a registered trademark of The MITRE Corporation.",
      "terms": "CVE Usage: MITRE hereby grants you a perpetual, worldwide, non-exclusive, no-charge, royalty-free, irrevocable copyright license to reproduce, prepare derivative works of, publicly display, publicly perform, sublicense, and distribute Common Vulnerabilities and Exposures (CVE™). Any copy you make for such purposes is authorized provided that you reproduce MITRE's copyright designation and this license in any such copy."
    },
    {
      "source": "FIRST EPSS",
      "url": "https://www.first.org/epss/",
      "licence": "free to use; FIRST requests attribution"
    }
  ],
  "record": {
    "id": "CVE-2021-47112",
    "sourceURL": "https://www.cve.org/CVERecord?id=CVE-2021-47112",
    "idYear": 2021,
    "status": "PUBLISHED",
    "publishedAt": "2024-03-15T20:14:20.602Z",
    "updatedAt": "2026-08-05T08:46:05.685Z",
    "importedAt": "2026-10-24T01:56:36.661Z",
    "snapshot": {
      "id": "cve_2026-10-24_midnight_baseline",
      "at": "2026-10-24T00:00:00.000Z",
      "source": "https://github.com/CVEProject/cvelistV5/releases/tag/cve_2026-10-24_0100Z"
    },
    "facts": {
      "title": "x86/kvm: Teardown PV features on boot CPU as well",
      "summary": "In the Linux kernel, the following vulnerability has been resolved:\n\nx86/kvm: Teardown PV features on boot CPU as well\n\nVarious PV features (Async PF, PV EOI, steal time) work through memory\nshared with hypervisor and when we restore from hibernation we must\nproperly teardown all these features to make sure hypervisor doesn't\nwrite to stale locations after we jump to the previously hibernated kernel\n(which can try to place anything there). For secondary CPUs the job is\nalready done by kvm_cpu_down_prepare(), register syscore ops to do\nthe same for boot CPU.",
      "affected": [
        {
          "vendor": "Linux",
          "product": "Linux",
          "defaultStatus": "unaffected",
          "versions": [
            {
              "version": "fd10cde9294f73eeccbc16f3fec1ae6cde7b800c",
              "status": "affected",
              "versionType": "git",
              "lessThan": "7620a669111b52f224d006dea9e1e688e2d62c54"
            },
            {
              "version": "fd10cde9294f73eeccbc16f3fec1ae6cde7b800c",
              "status": "affected",
              "versionType": "git",
              "lessThan": "38b858da1c58ad46519a257764e059e663b59ff2"
            },
            {
              "version": "fd10cde9294f73eeccbc16f3fec1ae6cde7b800c",
              "status": "affected",
              "versionType": "git",
              "lessThan": "d1629b5b925de9b27979e929dae7fcb766daf6b6"
            },
            {
              "version": "fd10cde9294f73eeccbc16f3fec1ae6cde7b800c",
              "status": "affected",
              "versionType": "git",
              "lessThan": "8b79feffeca28c5459458fe78676b081e87c93a4"
            }
          ]
        },
        {
          "vendor": "Linux",
          "product": "Linux",
          "defaultStatus": "affected",
          "versions": [
            {
              "version": "2.6.38",
              "status": "affected"
            },
            {
              "version": "0",
              "status": "unaffected",
              "versionType": "semver",
              "lessThan": "2.6.38"
            },
            {
              "version": "5.4.125",
              "status": "unaffected",
              "versionType": "semver",
              "lessThanOrEqual": "5.4.*"
            },
            {
              "version": "5.10.43",
              "status": "unaffected",
              "versionType": "semver",
              "lessThanOrEqual": "5.10.*"
            },
            {
              "version": "5.12.10",
              "status": "unaffected",
              "versionType": "semver",
              "lessThanOrEqual": "5.12.*"
            },
            {
              "version": "5.13",
              "status": "unaffected",
              "versionType": "original_commit_for_fix",
              "lessThanOrEqual": "*"
            }
          ]
        }
      ]
    }
  }
}