{
  "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-2021-47521",
    "sourceURL": "https://www.cve.org/CVERecord?id=CVE-2021-47521",
    "idYear": 2021,
    "status": "PUBLISHED",
    "publishedAt": "2024-05-24T15:09:34.457Z",
    "updatedAt": "2026-05-11T13:56:16.352Z",
    "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: sja1000: fix use after free in ems_pcmcia_add_card()",
      "summary": "In the Linux kernel, the following vulnerability has been resolved:\n\ncan: sja1000: fix use after free in ems_pcmcia_add_card()\n\nIf the last channel is not available then \"dev\" is freed.  Fortunately,\nwe can just use \"pdev->irq\" instead.\n\nAlso we should check if at least one channel was set up.",
      "affected": [
        {
          "vendor": "Linux",
          "product": "Linux",
          "defaultStatus": "unaffected",
          "versions": [
            {
              "version": "fd734c6f25aea4b2b44b045e489aec67b388577e",
              "status": "affected",
              "versionType": "git",
              "lessThan": "cbd86110546f7f730a1f5d7de56c944a336c15c4"
            },
            {
              "version": "fd734c6f25aea4b2b44b045e489aec67b388577e",
              "status": "affected",
              "versionType": "git",
              "lessThan": "1dd5b819f7e406dc15bbc7670596ff25261aaa2a"
            },
            {
              "version": "fd734c6f25aea4b2b44b045e489aec67b388577e",
              "status": "affected",
              "versionType": "git",
              "lessThan": "c8718026ba287168ff9ad0ccc4f9a413062cba36"
            },
            {
              "version": "fd734c6f25aea4b2b44b045e489aec67b388577e",
              "status": "affected",
              "versionType": "git",
              "lessThan": "ccf070183e4655824936c0f96c4a2bcca93419aa"
            },
            {
              "version": "fd734c6f25aea4b2b44b045e489aec67b388577e",
              "status": "affected",
              "versionType": "git",
              "lessThan": "1a295fea90e1acbe80c6d4940f5ff856edcd6bec"
            },
            {
              "version": "fd734c6f25aea4b2b44b045e489aec67b388577e",
              "status": "affected",
              "versionType": "git",
              "lessThan": "923f4dc5df679f678e121c20bf2fd70f7bf3e288"
            },
            {
              "version": "fd734c6f25aea4b2b44b045e489aec67b388577e",
              "status": "affected",
              "versionType": "git",
              "lessThan": "474f9a8534f5f89841240a7e978bafd6e1e039ce"
            },
            {
              "version": "fd734c6f25aea4b2b44b045e489aec67b388577e",
              "status": "affected",
              "versionType": "git",
              "lessThan": "3ec6ca6b1a8e64389f0212b5a1b0f6fed1909e45"
            }
          ]
        },
        {
          "vendor": "Linux",
          "product": "Linux",
          "defaultStatus": "affected",
          "versions": [
            {
              "version": "3.2",
              "status": "affected"
            },
            {
              "version": "0",
              "status": "unaffected",
              "versionType": "semver",
              "lessThan": "3.2"
            },
            {
              "version": "4.4.295",
              "status": "unaffected",
              "versionType": "semver",
              "lessThanOrEqual": "4.4.*"
            },
            {
              "version": "4.9.293",
              "status": "unaffected",
              "versionType": "semver",
              "lessThanOrEqual": "4.9.*"
            },
            {
              "version": "4.14.258",
              "status": "unaffected",
              "versionType": "semver",
              "lessThanOrEqual": "4.14.*"
            },
            {
              "version": "4.19.221",
              "status": "unaffected",
              "versionType": "semver",
              "lessThanOrEqual": "4.19.*"
            },
            {
              "version": "5.4.165",
              "status": "unaffected",
              "versionType": "semver",
              "lessThanOrEqual": "5.4.*"
            },
            {
              "version": "5.10.85",
              "status": "unaffected",
              "versionType": "semver",
              "lessThanOrEqual": "5.10.*"
            },
            {
              "version": "5.15.8",
              "status": "unaffected",
              "versionType": "semver",
              "lessThanOrEqual": "5.15.*"
            },
            {
              "version": "5.16",
              "status": "unaffected",
              "versionType": "original_commit_for_fix",
              "lessThanOrEqual": "*"
            }
          ]
        }
      ]
    }
  }
}