{
  "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-2021-47388",
    "sourceURL": "https://www.cve.org/CVERecord?id=CVE-2021-47388",
    "idYear": 2021,
    "status": "PUBLISHED",
    "publishedAt": "2024-05-21T15:03:47.574Z",
    "updatedAt": "2026-08-05T08:47:34.556Z",
    "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": "mac80211: fix use-after-free in CCMP/GCMP RX",
      "summary": "In the Linux kernel, the following vulnerability has been resolved:\n\nmac80211: fix use-after-free in CCMP/GCMP RX\n\nWhen PN checking is done in mac80211, for fragmentation we need\nto copy the PN to the RX struct so we can later use it to do a\ncomparison, since commit bf30ca922a0c (\"mac80211: check defrag\nPN against current frame\").\n\nUnfortunately, in that commit I used the 'hdr' variable without\nit being necessarily valid, so use-after-free could occur if it\nwas necessary to reallocate (parts of) the frame.\n\nFix this by reloading the variable after the code that results\nin the reallocations, if any.\n\nThis fixes https://bugzilla.kernel.org/show_bug.cgi?id=214401.",
      "affected": [
        {
          "vendor": "Linux",
          "product": "Linux",
          "defaultStatus": "unaffected",
          "versions": [
            {
              "version": "608b0a2ae928a74a2f89e02227339dd79cdb63cf",
              "status": "affected",
              "versionType": "git",
              "lessThan": "447d001b875d0e7f211c4ba004916028da994258"
            },
            {
              "version": "d0f613fe6de344dc17ba04a88921a2094c13d3fa",
              "status": "affected",
              "versionType": "git",
              "lessThan": "31de381aef0ab1b342f62485118dc8a19363dc78"
            },
            {
              "version": "a9b57952fed41556c950a92123086724eaf11919",
              "status": "affected",
              "versionType": "git",
              "lessThan": "f556e1d6fb9f2923a9a36f3df638c7d79ba09dbb"
            },
            {
              "version": "0f716b48ed25503e6961f4b5b40ece36f7e4ed26",
              "status": "affected",
              "versionType": "git",
              "lessThan": "3d5d629c99c468458022e9b381789de3595bf4dd"
            },
            {
              "version": "c8b3a6150dc8ac78d5fdd5fbdfc4806249ef8b2c",
              "status": "affected",
              "versionType": "git",
              "lessThan": "50149e0866a82cef33e680ee68dc380a5bc75d32"
            },
            {
              "version": "e64ea0597050157f926ac2ba9b478a44ee5be945",
              "status": "affected",
              "versionType": "git",
              "lessThan": "57de2dcb18742dc2860861c9f496da7d42b67da0"
            },
            {
              "version": "bf30ca922a0c0176007e074b0acc77ed345e9990",
              "status": "affected",
              "versionType": "git",
              "lessThan": "27d3eb5616ee2c0a3b30c3fa34813368ed1f3dc9"
            },
            {
              "version": "bf30ca922a0c0176007e074b0acc77ed345e9990",
              "status": "affected",
              "versionType": "git",
              "lessThan": "94513069eb549737bcfc3d988d6ed4da948a2de8"
            },
            {
              "version": "1f0bf30c01d3f4de7d6c5e27b102a808c5646676",
              "status": "affected",
              "versionType": "git"
            },
            {
              "version": "4.4.271",
              "status": "affected",
              "versionType": "semver",
              "lessThan": "4.4.286"
            },
            {
              "version": "4.9.271",
              "status": "affected",
              "versionType": "semver",
              "lessThan": "4.9.285"
            },
            {
              "version": "4.14.235",
              "status": "affected",
              "versionType": "semver",
              "lessThan": "4.14.249"
            },
            {
              "version": "4.19.193",
              "status": "affected",
              "versionType": "semver",
              "lessThan": "4.19.209"
            },
            {
              "version": "5.4.124",
              "status": "affected",
              "versionType": "semver",
              "lessThan": "5.4.151"
            },
            {
              "version": "5.10.42",
              "status": "affected",
              "versionType": "semver",
              "lessThan": "5.10.71"
            },
            {
              "version": "5.12.9",
              "status": "affected",
              "versionType": "semver",
              "lessThan": "5.13"
            }
          ]
        },
        {
          "vendor": "Linux",
          "product": "Linux",
          "defaultStatus": "affected",
          "versions": [
            {
              "version": "5.13",
              "status": "affected"
            },
            {
              "version": "0",
              "status": "unaffected",
              "versionType": "semver",
              "lessThan": "5.13"
            },
            {
              "version": "4.4.286",
              "status": "unaffected",
              "versionType": "semver",
              "lessThanOrEqual": "4.4.*"
            },
            {
              "version": "4.9.285",
              "status": "unaffected",
              "versionType": "semver",
              "lessThanOrEqual": "4.9.*"
            },
            {
              "version": "4.14.249",
              "status": "unaffected",
              "versionType": "semver",
              "lessThanOrEqual": "4.14.*"
            },
            {
              "version": "4.19.209",
              "status": "unaffected",
              "versionType": "semver",
              "lessThanOrEqual": "4.19.*"
            },
            {
              "version": "5.4.151",
              "status": "unaffected",
              "versionType": "semver",
              "lessThanOrEqual": "5.4.*"
            },
            {
              "version": "5.10.71",
              "status": "unaffected",
              "versionType": "semver",
              "lessThanOrEqual": "5.10.*"
            },
            {
              "version": "5.14.10",
              "status": "unaffected",
              "versionType": "semver",
              "lessThanOrEqual": "5.14.*"
            },
            {
              "version": "5.15",
              "status": "unaffected",
              "versionType": "original_commit_for_fix",
              "lessThanOrEqual": "*"
            }
          ]
        }
      ]
    }
  }
}