{
  "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-2021-47401",
    "sourceURL": "https://www.cve.org/CVERecord?id=CVE-2021-47401",
    "idYear": 2021,
    "status": "PUBLISHED",
    "publishedAt": "2024-05-21T15:03:56.024Z",
    "updatedAt": "2026-08-05T08:47:41.078Z",
    "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": "ipack: ipoctal: fix stack information leak",
      "summary": "In the Linux kernel, the following vulnerability has been resolved:\n\nipack: ipoctal: fix stack information leak\n\nThe tty driver name is used also after registering the driver and must\nspecifically not be allocated on the stack to avoid leaking information\nto user space (or triggering an oops).\n\nDrivers should not try to encode topology information in the tty device\nname but this one snuck in through staging without anyone noticing and\nanother driver has since copied this malpractice.\n\nFixing the ABI is a separate issue, but this at least plugs the security\nhole.",
      "affected": [
        {
          "vendor": "Linux",
          "product": "Linux",
          "defaultStatus": "unaffected",
          "versions": [
            {
              "version": "ba4dc61fe8c545a5d6a68b63616776556b771f51",
              "status": "affected",
              "versionType": "git",
              "lessThan": "acb96e782bad427ca4bb1bd94af660acd1462380"
            },
            {
              "version": "ba4dc61fe8c545a5d6a68b63616776556b771f51",
              "status": "affected",
              "versionType": "git",
              "lessThan": "741ea2670e021350e54f491106bdaa22dc50e6a0"
            },
            {
              "version": "ba4dc61fe8c545a5d6a68b63616776556b771f51",
              "status": "affected",
              "versionType": "git",
              "lessThan": "2725925982dc96a78069cd118ea3d66759bfdad7"
            },
            {
              "version": "ba4dc61fe8c545a5d6a68b63616776556b771f51",
              "status": "affected",
              "versionType": "git",
              "lessThan": "829f13d6079cf7a2465522f39acb43033e9b320d"
            },
            {
              "version": "ba4dc61fe8c545a5d6a68b63616776556b771f51",
              "status": "affected",
              "versionType": "git",
              "lessThan": "8657158a3b68c85234e6da3d8eae33d6183588b7"
            },
            {
              "version": "ba4dc61fe8c545a5d6a68b63616776556b771f51",
              "status": "affected",
              "versionType": "git",
              "lessThan": "5f6a309a699675680df15d9b6d389114515b4426"
            },
            {
              "version": "ba4dc61fe8c545a5d6a68b63616776556b771f51",
              "status": "affected",
              "versionType": "git",
              "lessThan": "0a9c36a2e06a249acbed64e8e0b84637c2ad7575"
            },
            {
              "version": "ba4dc61fe8c545a5d6a68b63616776556b771f51",
              "status": "affected",
              "versionType": "git",
              "lessThan": "a89936cce87d60766a75732a9e7e25c51164f47c"
            }
          ]
        },
        {
          "vendor": "Linux",
          "product": "Linux",
          "defaultStatus": "affected",
          "versions": [
            {
              "version": "3.5",
              "status": "affected"
            },
            {
              "version": "0",
              "status": "unaffected",
              "versionType": "semver",
              "lessThan": "3.5"
            },
            {
              "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": "*"
            }
          ]
        }
      ]
    }
  }
}