{
  "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-2021-47455",
    "sourceURL": "https://www.cve.org/CVERecord?id=CVE-2021-47455",
    "idYear": 2021,
    "status": "PUBLISHED",
    "publishedAt": "2024-05-22T06:19:44.700Z",
    "updatedAt": "2026-05-23T15:20:01.562Z",
    "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": "ptp: Fix possible memory leak in ptp_clock_register()",
      "summary": "In the Linux kernel, the following vulnerability has been resolved:\n\nptp: Fix possible memory leak in ptp_clock_register()\n\nI got memory leak as follows when doing fault injection test:\n\nunreferenced object 0xffff88800906c618 (size 8):\n  comm \"i2c-idt82p33931\", pid 4421, jiffies 4294948083 (age 13.188s)\n  hex dump (first 8 bytes):\n    70 74 70 30 00 00 00 00                          ptp0....\n  backtrace:\n    [<00000000312ed458>] __kmalloc_track_caller+0x19f/0x3a0\n    [<0000000079f6e2ff>] kvasprintf+0xb5/0x150\n    [<0000000026aae54f>] kvasprintf_const+0x60/0x190\n    [<00000000f323a5f7>] kobject_set_name_vargs+0x56/0x150\n    [<000000004e35abdd>] dev_set_name+0xc0/0x100\n    [<00000000f20cfe25>] ptp_clock_register+0x9f4/0xd30 [ptp]\n    [<000000008bb9f0de>] idt82p33_probe.cold+0x8b6/0x1561 [ptp_idt82p33]\n\nWhen posix_clock_register() returns an error, the name allocated\nin dev_set_name() will be leaked, the put_device() should be used\nto give up the device reference, then the name will be freed in\nkobject_cleanup() and other memory will be freed in ptp_clock_release().",
      "affected": [
        {
          "vendor": "Linux",
          "product": "Linux",
          "defaultStatus": "unaffected",
          "versions": [
            {
              "version": "a33121e5487b424339636b25c35d3a180eaa5f5e",
              "status": "affected",
              "versionType": "git",
              "lessThan": "f1c96d8085588e1b997a96214b409ac3be20b524"
            },
            {
              "version": "a33121e5487b424339636b25c35d3a180eaa5f5e",
              "status": "affected",
              "versionType": "git",
              "lessThan": "95c0a0c5ec8839f8f21672be786e87a100319ca8"
            },
            {
              "version": "a33121e5487b424339636b25c35d3a180eaa5f5e",
              "status": "affected",
              "versionType": "git",
              "lessThan": "4225fea1cb28370086e17e82c0f69bec2779dca0"
            },
            {
              "version": "5230ef61882d2d14deb846eb6b48370694816e4c",
              "status": "affected",
              "versionType": "git"
            },
            {
              "version": "6f5e3bb7879ee1eb71c6c3cbaaffbb0da6cd7d57",
              "status": "affected",
              "versionType": "git"
            },
            {
              "version": "89e8fc989feaac00bf1a7f9a766289422e2f5768",
              "status": "affected",
              "versionType": "git"
            },
            {
              "version": "2dece4d6d13fe179ee3a5991811712725a56e2f7",
              "status": "affected",
              "versionType": "git"
            },
            {
              "version": "0393b8720128d5b39db8523e5bfbfc689f18c37c",
              "status": "affected",
              "versionType": "git"
            },
            {
              "version": "bfa2e0cd3dfda64fde43c3dca3aeba298d2fe7ad",
              "status": "affected",
              "versionType": "git"
            },
            {
              "version": "3.16.83",
              "status": "affected",
              "versionType": "semver",
              "lessThan": "3.17"
            },
            {
              "version": "4.4.224",
              "status": "affected",
              "versionType": "semver",
              "lessThan": "4.5"
            },
            {
              "version": "4.9.224",
              "status": "affected",
              "versionType": "semver",
              "lessThan": "4.10"
            },
            {
              "version": "4.14.162",
              "status": "affected",
              "versionType": "semver",
              "lessThan": "4.15"
            },
            {
              "version": "4.19.93",
              "status": "affected",
              "versionType": "semver",
              "lessThan": "4.20"
            },
            {
              "version": "5.4.8",
              "status": "affected",
              "versionType": "semver",
              "lessThan": "5.5"
            }
          ]
        },
        {
          "vendor": "Linux",
          "product": "Linux",
          "defaultStatus": "affected",
          "versions": [
            {
              "version": "5.5",
              "status": "affected"
            },
            {
              "version": "0",
              "status": "unaffected",
              "versionType": "semver",
              "lessThan": "5.5"
            },
            {
              "version": "5.10.241",
              "status": "unaffected",
              "versionType": "semver",
              "lessThanOrEqual": "5.10.*"
            },
            {
              "version": "5.14.15",
              "status": "unaffected",
              "versionType": "semver",
              "lessThanOrEqual": "5.14.*"
            },
            {
              "version": "5.15",
              "status": "unaffected",
              "versionType": "original_commit_for_fix",
              "lessThanOrEqual": "*"
            }
          ]
        }
      ]
    }
  }
}