{
  "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-2023-53224",
    "sourceURL": "https://www.cve.org/CVERecord?id=CVE-2023-53224",
    "idYear": 2023,
    "status": "PUBLISHED",
    "publishedAt": "2025-09-15T14:21:53.061Z",
    "updatedAt": "2026-05-11T19:40:39.797Z",
    "importedAt": "2026-10-24T01:57:03.413Z",
    "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": "ext4: Fix function prototype mismatch for ext4_feat_ktype",
      "summary": "In the Linux kernel, the following vulnerability has been resolved:\n\next4: Fix function prototype mismatch for ext4_feat_ktype\n\nWith clang's kernel control flow integrity (kCFI, CONFIG_CFI_CLANG),\nindirect call targets are validated against the expected function\npointer prototype to make sure the call target is valid to help mitigate\nROP attacks. If they are not identical, there is a failure at run time,\nwhich manifests as either a kernel panic or thread getting killed.\n\next4_feat_ktype was setting the \"release\" handler to \"kfree\", which\ndoesn't have a matching function prototype. Add a simple wrapper\nwith the correct prototype.\n\nThis was found as a result of Clang's new -Wcast-function-type-strict\nflag, which is more sensitive than the simpler -Wcast-function-type,\nwhich only checks for type width mismatches.\n\nNote that this code is only reached when ext4 is a loadable module and\nit is being unloaded:\n\n CFI failure at kobject_put+0xbb/0x1b0 (target: kfree+0x0/0x180; expected type: 0x7c4aa698)\n ...\n RIP: 0010:kobject_put+0xbb/0x1b0\n ...\n Call Trace:\n  <TASK>\n  ext4_exit_sysfs+0x14/0x60 [ext4]\n  cleanup_module+0x67/0xedb [ext4]",
      "affected": [
        {
          "vendor": "Linux",
          "product": "Linux",
          "defaultStatus": "unaffected",
          "versions": [
            {
              "version": "b99fee58a20ab8e0557cce87b6f187e325993142",
              "status": "affected",
              "versionType": "git",
              "lessThan": "2b69cdd9f9a7f596e3dd31f05f9852940d177924"
            },
            {
              "version": "b99fee58a20ab8e0557cce87b6f187e325993142",
              "status": "affected",
              "versionType": "git",
              "lessThan": "99e3fd21f8fc975c95e8cf76fbf6a3d2656f8f71"
            },
            {
              "version": "b99fee58a20ab8e0557cce87b6f187e325993142",
              "status": "affected",
              "versionType": "git",
              "lessThan": "1ba10d3640e9783dad811fe4e24d55465c37c64d"
            },
            {
              "version": "b99fee58a20ab8e0557cce87b6f187e325993142",
              "status": "affected",
              "versionType": "git",
              "lessThan": "c98077f7598a562f51051eec043be0cb3e1b1b5e"
            },
            {
              "version": "b99fee58a20ab8e0557cce87b6f187e325993142",
              "status": "affected",
              "versionType": "git",
              "lessThan": "0a1394e07c5d6bf1bfc25db8589ff1b1bfb6f46a"
            },
            {
              "version": "b99fee58a20ab8e0557cce87b6f187e325993142",
              "status": "affected",
              "versionType": "git",
              "lessThan": "94d8de83286fb1827340eba35b61c308f6b46ead"
            },
            {
              "version": "b99fee58a20ab8e0557cce87b6f187e325993142",
              "status": "affected",
              "versionType": "git",
              "lessThan": "118901ad1f25d2334255b3d50512fa20591531cd"
            }
          ]
        },
        {
          "vendor": "Linux",
          "product": "Linux",
          "defaultStatus": "affected",
          "versions": [
            {
              "version": "4.16",
              "status": "affected"
            },
            {
              "version": "0",
              "status": "unaffected",
              "versionType": "semver",
              "lessThan": "4.16"
            },
            {
              "version": "4.19.274",
              "status": "unaffected",
              "versionType": "semver",
              "lessThanOrEqual": "4.19.*"
            },
            {
              "version": "5.4.233",
              "status": "unaffected",
              "versionType": "semver",
              "lessThanOrEqual": "5.4.*"
            },
            {
              "version": "5.10.170",
              "status": "unaffected",
              "versionType": "semver",
              "lessThanOrEqual": "5.10.*"
            },
            {
              "version": "5.15.96",
              "status": "unaffected",
              "versionType": "semver",
              "lessThanOrEqual": "5.15.*"
            },
            {
              "version": "6.1.14",
              "status": "unaffected",
              "versionType": "semver",
              "lessThanOrEqual": "6.1.*"
            },
            {
              "version": "6.2.1",
              "status": "unaffected",
              "versionType": "semver",
              "lessThanOrEqual": "6.2.*"
            },
            {
              "version": "6.3",
              "status": "unaffected",
              "versionType": "original_commit_for_fix",
              "lessThanOrEqual": "*"
            }
          ]
        }
      ]
    }
  }
}