{
  "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-2021-47668",
    "sourceURL": "https://www.cve.org/CVERecord?id=CVE-2021-47668",
    "idYear": 2021,
    "status": "PUBLISHED",
    "publishedAt": "2025-04-17T18:01:29.315Z",
    "updatedAt": "2026-08-05T08:48:48.169Z",
    "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": "can: dev: can_restart: fix use after free bug",
      "summary": "In the Linux kernel, the following vulnerability has been resolved:\n\ncan: dev: can_restart: fix use after free bug\n\nAfter calling netif_rx_ni(skb), dereferencing skb is unsafe.\nEspecially, the can_frame cf which aliases skb memory is accessed\nafter the netif_rx_ni() in:\n      stats->rx_bytes += cf->len;\n\nReordering the lines solves the issue.",
      "affected": [
        {
          "vendor": "Linux",
          "product": "Linux",
          "defaultStatus": "unaffected",
          "versions": [
            {
              "version": "39549eef3587f1c1e8c65c88a2400d10fd30ea17",
              "status": "affected",
              "versionType": "git",
              "lessThan": "260925a0b7d2da5449f8ecfd02c1405e0c8a45b8"
            },
            {
              "version": "39549eef3587f1c1e8c65c88a2400d10fd30ea17",
              "status": "affected",
              "versionType": "git",
              "lessThan": "bbc6847b9b8978b520f62fbc7c68c54ef0f8d282"
            },
            {
              "version": "39549eef3587f1c1e8c65c88a2400d10fd30ea17",
              "status": "affected",
              "versionType": "git",
              "lessThan": "92668d28c7e6a7a2ba07df287669ffcdf650c421"
            },
            {
              "version": "39549eef3587f1c1e8c65c88a2400d10fd30ea17",
              "status": "affected",
              "versionType": "git",
              "lessThan": "08ab951787098ae0b6c0364aeea7a8138226f234"
            },
            {
              "version": "39549eef3587f1c1e8c65c88a2400d10fd30ea17",
              "status": "affected",
              "versionType": "git",
              "lessThan": "ac48ef15826e83f4206c47add61072e8fc76d328"
            },
            {
              "version": "39549eef3587f1c1e8c65c88a2400d10fd30ea17",
              "status": "affected",
              "versionType": "git",
              "lessThan": "593c072b7b3c4d7044416eb039d9ad706bedd67a"
            },
            {
              "version": "39549eef3587f1c1e8c65c88a2400d10fd30ea17",
              "status": "affected",
              "versionType": "git",
              "lessThan": "03f16c5075b22c8902d2af739969e878b0879c94"
            }
          ]
        },
        {
          "vendor": "Linux",
          "product": "Linux",
          "defaultStatus": "affected",
          "versions": [
            {
              "version": "2.6.31",
              "status": "affected"
            },
            {
              "version": "0",
              "status": "unaffected",
              "versionType": "semver",
              "lessThan": "2.6.31"
            },
            {
              "version": "4.4.254",
              "status": "unaffected",
              "versionType": "semver",
              "lessThanOrEqual": "4.4.*"
            },
            {
              "version": "4.9.254",
              "status": "unaffected",
              "versionType": "semver",
              "lessThanOrEqual": "4.9.*"
            },
            {
              "version": "4.14.218",
              "status": "unaffected",
              "versionType": "semver",
              "lessThanOrEqual": "4.14.*"
            },
            {
              "version": "4.19.171",
              "status": "unaffected",
              "versionType": "semver",
              "lessThanOrEqual": "4.19.*"
            },
            {
              "version": "5.4.93",
              "status": "unaffected",
              "versionType": "semver",
              "lessThanOrEqual": "5.4.*"
            },
            {
              "version": "5.10.11",
              "status": "unaffected",
              "versionType": "semver",
              "lessThanOrEqual": "5.10.*"
            },
            {
              "version": "5.11",
              "status": "unaffected",
              "versionType": "original_commit_for_fix",
              "lessThanOrEqual": "*"
            }
          ]
        }
      ]
    }
  }
}