{
  "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-2023-3609",
    "sourceURL": "https://www.cve.org/CVERecord?id=CVE-2023-3609",
    "idYear": 2023,
    "status": "PUBLISHED",
    "publishedAt": "2023-07-21T20:47:12.172Z",
    "updatedAt": "2026-10-14T20:55:31.437Z",
    "importedAt": "2026-10-24T01:56:58.683Z",
    "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": "Use-after-free in Linux kernel's net/sched: cls_u32 component",
      "summary": "A use-after-free vulnerability in the Linux kernel's net/sched: cls_u32 component can be exploited to achieve local privilege escalation.\n\n\n\nIf tcf_change_indev() fails, u32_set_parms() will immediately return an error after incrementing or decrementing the reference counter in tcf_bind_filter(). If an attacker can control the reference counter and set it to zero, they can cause the reference to be freed, leading to a use-after-free vulnerability.\n\n\n\nWe recommend upgrading past commit 04c55383fa5689357bcdd2c8036725a55ed632bc.",
      "affected": [
        {
          "vendor": "Linux",
          "product": "Kernel",
          "packageName": "kernel",
          "platforms": [
            "Linux"
          ],
          "defaultStatus": "unaffected",
          "versions": [
            {
              "version": "4.14.0",
              "status": "affected",
              "versionType": "semver",
              "lessThan": "4.14.322"
            },
            {
              "version": "4.15.0",
              "status": "affected",
              "versionType": "semver",
              "lessThan": "4.19.291"
            },
            {
              "version": "4.20.0",
              "status": "affected",
              "versionType": "semver",
              "lessThan": "5.4.248"
            },
            {
              "version": "5.5.0",
              "status": "affected",
              "versionType": "semver",
              "lessThan": "5.10.185"
            },
            {
              "version": "5.11.0",
              "status": "affected",
              "versionType": "semver",
              "lessThan": "5.15.118"
            },
            {
              "version": "5.16.0",
              "status": "affected",
              "versionType": "semver",
              "lessThan": "6.1.35"
            },
            {
              "version": "6.2.0",
              "status": "affected",
              "versionType": "semver",
              "lessThan": "6.3.9"
            },
            {
              "version": "6.4.0",
              "status": "unaffected",
              "versionType": "semver"
            },
            {
              "version": "04c55383fa5689357bcdd2c8036725a55ed632bc",
              "status": "unaffected",
              "versionType": "git"
            }
          ]
        }
      ]
    }
  }
}