{
  "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-2026-23405",
    "sourceURL": "https://www.cve.org/CVERecord?id=CVE-2026-23405",
    "idYear": 2026,
    "status": "PUBLISHED",
    "publishedAt": "2026-04-01T08:36:35.697Z",
    "updatedAt": "2026-05-11T22:06:16.436Z",
    "importedAt": "2026-10-24T01:58:02.025Z",
    "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": "apparmor: fix: limit the number of levels of policy namespaces",
      "summary": "In the Linux kernel, the following vulnerability has been resolved:\n\napparmor: fix: limit the number of levels of policy namespaces\n\nCurrently the number of policy namespaces is not bounded relying on\nthe user namespace limit. However policy namespaces aren't strictly\ntied to user namespaces and it is possible to create them and nest\nthem arbitrarily deep which can be used to exhaust system resource.\n\nHard cap policy namespaces to the same depth as user namespaces.",
      "affected": [
        {
          "vendor": "Linux",
          "product": "Linux",
          "defaultStatus": "unaffected",
          "versions": [
            {
              "version": "c88d4c7b049e87998ac0a9f455aa545cc895ef92",
              "status": "affected",
              "versionType": "git",
              "lessThan": "6b396cc2f0365e684fc1d3547d18ef79fcee225d"
            },
            {
              "version": "c88d4c7b049e87998ac0a9f455aa545cc895ef92",
              "status": "affected",
              "versionType": "git",
              "lessThan": "87d0cecc900e55d55fc4dbfb43ac93e269c7a5b3"
            },
            {
              "version": "c88d4c7b049e87998ac0a9f455aa545cc895ef92",
              "status": "affected",
              "versionType": "git",
              "lessThan": "b1226e37eb3754d389721c135db6107db94c7a72"
            },
            {
              "version": "c88d4c7b049e87998ac0a9f455aa545cc895ef92",
              "status": "affected",
              "versionType": "git",
              "lessThan": "3f8699b3ee0c04b4b9bc27b82cd89a40e81e1d2e"
            },
            {
              "version": "c88d4c7b049e87998ac0a9f455aa545cc895ef92",
              "status": "affected",
              "versionType": "git",
              "lessThan": "853ce31ca72097d23991a06876a2ccb5cb64b603"
            },
            {
              "version": "c88d4c7b049e87998ac0a9f455aa545cc895ef92",
              "status": "affected",
              "versionType": "git",
              "lessThan": "d42b2b6bb77ca40ee34ab74ad79305840b5f315d"
            },
            {
              "version": "c88d4c7b049e87998ac0a9f455aa545cc895ef92",
              "status": "affected",
              "versionType": "git",
              "lessThan": "7b6495ead2c611647f6b11441a852324e3eb8616"
            },
            {
              "version": "c88d4c7b049e87998ac0a9f455aa545cc895ef92",
              "status": "affected",
              "versionType": "git",
              "lessThan": "306039414932c80f8420695a24d4fe10c84ccfb2"
            }
          ]
        },
        {
          "vendor": "Linux",
          "product": "Linux",
          "defaultStatus": "affected",
          "versions": [
            {
              "version": "2.6.36",
              "status": "affected"
            },
            {
              "version": "0",
              "status": "unaffected",
              "versionType": "semver",
              "lessThan": "2.6.36"
            },
            {
              "version": "5.10.253",
              "status": "unaffected",
              "versionType": "semver",
              "lessThanOrEqual": "5.10.*"
            },
            {
              "version": "5.15.203",
              "status": "unaffected",
              "versionType": "semver",
              "lessThanOrEqual": "5.15.*"
            },
            {
              "version": "6.1.169",
              "status": "unaffected",
              "versionType": "semver",
              "lessThanOrEqual": "6.1.*"
            },
            {
              "version": "6.6.130",
              "status": "unaffected",
              "versionType": "semver",
              "lessThanOrEqual": "6.6.*"
            },
            {
              "version": "6.12.77",
              "status": "unaffected",
              "versionType": "semver",
              "lessThanOrEqual": "6.12.*"
            },
            {
              "version": "6.18.18",
              "status": "unaffected",
              "versionType": "semver",
              "lessThanOrEqual": "6.18.*"
            },
            {
              "version": "6.19.8",
              "status": "unaffected",
              "versionType": "semver",
              "lessThanOrEqual": "6.19.*"
            },
            {
              "version": "7.0",
              "status": "unaffected",
              "versionType": "original_commit_for_fix",
              "lessThanOrEqual": "*"
            }
          ]
        }
      ]
    }
  }
}