{
  "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-2021-47280",
    "sourceURL": "https://www.cve.org/CVERecord?id=CVE-2021-47280",
    "idYear": 2021,
    "status": "PUBLISHED",
    "publishedAt": "2024-05-21T14:20:06.852Z",
    "updatedAt": "2026-05-11T13:51:27.366Z",
    "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": "drm: Fix use-after-free read in drm_getunique()",
      "summary": "In the Linux kernel, the following vulnerability has been resolved:\n\ndrm: Fix use-after-free read in drm_getunique()\n\nThere is a time-of-check-to-time-of-use error in drm_getunique() due\nto retrieving file_priv->master prior to locking the device's master\nmutex.\n\nAn example can be seen in the crash report of the use-after-free error\nfound by Syzbot:\nhttps://syzkaller.appspot.com/bug?id=148d2f1dfac64af52ffd27b661981a540724f803\n\nIn the report, the master pointer was used after being freed. This is\nbecause another process had acquired the device's master mutex in\ndrm_setmaster_ioctl(), then overwrote fpriv->master in\ndrm_new_set_master(). The old value of fpriv->master was subsequently\nfreed before the mutex was unlocked.\n\nTo fix this, we lock the device's master mutex before retrieving the\npointer from from fpriv->master. This patch passes the Syzbot\nreproducer test.",
      "affected": [
        {
          "vendor": "Linux",
          "product": "Linux",
          "defaultStatus": "unaffected",
          "versions": [
            {
              "version": "5acc614ac47465fee6375a9af4740f618830762d",
              "status": "affected",
              "versionType": "git",
              "lessThan": "17dab9326ff263c62dab1dbac4492e2938a049e4"
            },
            {
              "version": "5acc614ac47465fee6375a9af4740f618830762d",
              "status": "affected",
              "versionType": "git",
              "lessThan": "7d233ba700ceb593905ea82b42dadb4ec8ef85e9"
            },
            {
              "version": "5acc614ac47465fee6375a9af4740f618830762d",
              "status": "affected",
              "versionType": "git",
              "lessThan": "b246b4c70c1250e7814f409b243000f9c0bf79a3"
            },
            {
              "version": "5acc614ac47465fee6375a9af4740f618830762d",
              "status": "affected",
              "versionType": "git",
              "lessThan": "491d52e0078860b33b6c14f0a7ac74ca1b603bd6"
            },
            {
              "version": "5acc614ac47465fee6375a9af4740f618830762d",
              "status": "affected",
              "versionType": "git",
              "lessThan": "f773f8cccac13c7e7bbd9182e7996c727742488e"
            },
            {
              "version": "5acc614ac47465fee6375a9af4740f618830762d",
              "status": "affected",
              "versionType": "git",
              "lessThan": "b436acd1cf7fac0ba987abd22955d98025c80c2b"
            }
          ]
        },
        {
          "vendor": "Linux",
          "product": "Linux",
          "defaultStatus": "affected",
          "versions": [
            {
              "version": "4.11",
              "status": "affected"
            },
            {
              "version": "0",
              "status": "unaffected",
              "versionType": "semver",
              "lessThan": "4.11"
            },
            {
              "version": "4.14.237",
              "status": "unaffected",
              "versionType": "semver",
              "lessThanOrEqual": "4.14.*"
            },
            {
              "version": "4.19.195",
              "status": "unaffected",
              "versionType": "semver",
              "lessThanOrEqual": "4.19.*"
            },
            {
              "version": "5.4.126",
              "status": "unaffected",
              "versionType": "semver",
              "lessThanOrEqual": "5.4.*"
            },
            {
              "version": "5.10.44",
              "status": "unaffected",
              "versionType": "semver",
              "lessThanOrEqual": "5.10.*"
            },
            {
              "version": "5.12.11",
              "status": "unaffected",
              "versionType": "semver",
              "lessThanOrEqual": "5.12.*"
            },
            {
              "version": "5.13",
              "status": "unaffected",
              "versionType": "original_commit_for_fix",
              "lessThanOrEqual": "*"
            }
          ]
        }
      ]
    }
  }
}