{
  "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-2025-21759",
    "sourceURL": "https://www.cve.org/CVERecord?id=CVE-2025-21759",
    "idYear": 2025,
    "status": "PUBLISHED",
    "publishedAt": "2025-02-27T02:18:12.994Z",
    "updatedAt": "2026-10-03T10:55:25.159Z",
    "importedAt": "2026-10-24T01:57:29.455Z",
    "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": "ipv6: mcast: extend RCU protection in igmp6_send()",
      "summary": "In the Linux kernel, the following vulnerability has been resolved:\n\nipv6: mcast: extend RCU protection in igmp6_send()\n\nigmp6_send() can be called without RTNL or RCU being held.\n\nExtend RCU protection so that we can safely fetch the net pointer\nand avoid a potential UAF.\n\nNote that we no longer can use sock_alloc_send_skb() because\nipv6.igmp_sk uses GFP_KERNEL allocations which can sleep.\n\nInstead use alloc_skb() and charge the net->ipv6.igmp_sk\nsocket under RCU protection.",
      "affected": [
        {
          "vendor": "Linux",
          "product": "Linux",
          "defaultStatus": "unaffected",
          "versions": [
            {
              "version": "b8ad0cbc58f703972e9e37c4e2a8081dd7e6a551",
              "status": "affected",
              "versionType": "git",
              "lessThan": "638e8fe3563a82f298fe537a28d5342a97278cf1"
            },
            {
              "version": "b8ad0cbc58f703972e9e37c4e2a8081dd7e6a551",
              "status": "affected",
              "versionType": "git",
              "lessThan": "6901bbb169e3add6c037218d996790cef6b3d650"
            },
            {
              "version": "b8ad0cbc58f703972e9e37c4e2a8081dd7e6a551",
              "status": "affected",
              "versionType": "git",
              "lessThan": "7e0a818ecc4d62e7fb668ea02de0bfe8ba0b7dff"
            },
            {
              "version": "b8ad0cbc58f703972e9e37c4e2a8081dd7e6a551",
              "status": "affected",
              "versionType": "git",
              "lessThan": "81b25a07ebf53f9ef4ca8f3d96a8ddb94561dd5a"
            },
            {
              "version": "b8ad0cbc58f703972e9e37c4e2a8081dd7e6a551",
              "status": "affected",
              "versionType": "git",
              "lessThan": "0bf8e2f3768629d437a32cb824149e6e98254381"
            },
            {
              "version": "b8ad0cbc58f703972e9e37c4e2a8081dd7e6a551",
              "status": "affected",
              "versionType": "git",
              "lessThan": "8e92d6a413feaf968a33f0b439ecf27404407458"
            },
            {
              "version": "b8ad0cbc58f703972e9e37c4e2a8081dd7e6a551",
              "status": "affected",
              "versionType": "git",
              "lessThan": "087c1faa594fa07a66933d750c0b2610aa1a2946"
            }
          ]
        },
        {
          "vendor": "Linux",
          "product": "Linux",
          "defaultStatus": "affected",
          "versions": [
            {
              "version": "2.6.26",
              "status": "affected"
            },
            {
              "version": "0",
              "status": "unaffected",
              "versionType": "semver",
              "lessThan": "2.6.26"
            },
            {
              "version": "5.10.271",
              "status": "unaffected",
              "versionType": "semver",
              "lessThanOrEqual": "5.10.*"
            },
            {
              "version": "5.15.222",
              "status": "unaffected",
              "versionType": "semver",
              "lessThanOrEqual": "5.15.*"
            },
            {
              "version": "6.1.189",
              "status": "unaffected",
              "versionType": "semver",
              "lessThanOrEqual": "6.1.*"
            },
            {
              "version": "6.6.79",
              "status": "unaffected",
              "versionType": "semver",
              "lessThanOrEqual": "6.6.*"
            },
            {
              "version": "6.12.16",
              "status": "unaffected",
              "versionType": "semver",
              "lessThanOrEqual": "6.12.*"
            },
            {
              "version": "6.13.4",
              "status": "unaffected",
              "versionType": "semver",
              "lessThanOrEqual": "6.13.*"
            },
            {
              "version": "6.14",
              "status": "unaffected",
              "versionType": "original_commit_for_fix",
              "lessThanOrEqual": "*"
            }
          ]
        }
      ]
    }
  }
}