{
  "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-2026-52909",
    "sourceURL": "https://www.cve.org/CVERecord?id=CVE-2026-52909",
    "idYear": 2026,
    "status": "PUBLISHED",
    "publishedAt": "2026-06-19T14:43:33.214Z",
    "updatedAt": "2026-10-19T19:36:59.506Z",
    "importedAt": "2026-10-24T01:58:14.884Z",
    "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": "ip6_vti: set netns_immutable on the fallback device.",
      "summary": "In the Linux kernel, the following vulnerability has been resolved:\n\nip6_vti: set netns_immutable on the fallback device.\n\njohn1988 and Noam Rathaus reported that vti6_init_net() does not set the\nnetns_immutable flag on the per-netns fallback tunnel device (ip6_vti0).\n\nOther similar tunnel drivers (like ip6_tunnel, sit, ip6_gre, and ip_tunnel)\ncorrectly set this flag during their fallback device initialization to\nprevent them from being moved to another network namespace.",
      "affected": [
        {
          "vendor": "Linux",
          "product": "Linux",
          "defaultStatus": "unaffected",
          "versions": [
            {
              "version": "61220ab349485d911083d0b7990ccd3db6c63297",
              "status": "affected",
              "versionType": "git",
              "lessThan": "12acc977838c943636fb01e2f3087d2e4cc3b7cc"
            },
            {
              "version": "61220ab349485d911083d0b7990ccd3db6c63297",
              "status": "affected",
              "versionType": "git",
              "lessThan": "7f28e3948c59481f8db9c9638e204258d26b4e41"
            },
            {
              "version": "61220ab349485d911083d0b7990ccd3db6c63297",
              "status": "affected",
              "versionType": "git",
              "lessThan": "12c65e2c7fef507551bd7b52123598a761662c01"
            },
            {
              "version": "61220ab349485d911083d0b7990ccd3db6c63297",
              "status": "affected",
              "versionType": "git",
              "lessThan": "f4b6b4af7ef0661ac153c6f7eb1030aa8482c1a3"
            },
            {
              "version": "61220ab349485d911083d0b7990ccd3db6c63297",
              "status": "affected",
              "versionType": "git",
              "lessThan": "c5dbd669db5a426b3025512322e1bf2cdbe14305"
            },
            {
              "version": "61220ab349485d911083d0b7990ccd3db6c63297",
              "status": "affected",
              "versionType": "git",
              "lessThan": "ecf8904067dcba0dad86ece80874841e60317885"
            },
            {
              "version": "61220ab349485d911083d0b7990ccd3db6c63297",
              "status": "affected",
              "versionType": "git",
              "lessThan": "dcdce3bc9f08026ff3739ee7339e1bef526fc5f3"
            },
            {
              "version": "61220ab349485d911083d0b7990ccd3db6c63297",
              "status": "affected",
              "versionType": "git",
              "lessThan": "d289d5307762d1838aaece22c6b6fcad9e8865f9"
            }
          ]
        },
        {
          "vendor": "Linux",
          "product": "Linux",
          "defaultStatus": "affected",
          "versions": [
            {
              "version": "3.15",
              "status": "affected"
            },
            {
              "version": "0",
              "status": "unaffected",
              "versionType": "semver",
              "lessThan": "3.15"
            },
            {
              "version": "5.10.260",
              "status": "unaffected",
              "versionType": "semver",
              "lessThanOrEqual": "5.10.*"
            },
            {
              "version": "5.15.211",
              "status": "unaffected",
              "versionType": "semver",
              "lessThanOrEqual": "5.15.*"
            },
            {
              "version": "6.1.177",
              "status": "unaffected",
              "versionType": "semver",
              "lessThanOrEqual": "6.1.*"
            },
            {
              "version": "6.6.144",
              "status": "unaffected",
              "versionType": "semver",
              "lessThanOrEqual": "6.6.*"
            },
            {
              "version": "6.12.95",
              "status": "unaffected",
              "versionType": "semver",
              "lessThanOrEqual": "6.12.*"
            },
            {
              "version": "6.18.36",
              "status": "unaffected",
              "versionType": "semver",
              "lessThanOrEqual": "6.18.*"
            },
            {
              "version": "7.0.13",
              "status": "unaffected",
              "versionType": "semver",
              "lessThanOrEqual": "7.0.*"
            },
            {
              "version": "7.1",
              "status": "unaffected",
              "versionType": "original_commit_for_fix",
              "lessThanOrEqual": "*"
            }
          ]
        }
      ]
    }
  }
}