{
  "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-2026-63968",
    "sourceURL": "https://www.cve.org/CVERecord?id=CVE-2026-63968",
    "idYear": 2026,
    "status": "PUBLISHED",
    "publishedAt": "2026-07-19T14:55:55.620Z",
    "updatedAt": "2026-10-19T20:17:59.162Z",
    "importedAt": "2026-10-24T01:58:25.636Z",
    "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: fix possible infinite loop in fib6_select_path()",
      "summary": "In the Linux kernel, the following vulnerability has been resolved:\n\nipv6: fix possible infinite loop in fib6_select_path()\n\nFound while auditing the same pattern Sashiko reported in\nrt6_fill_node() [1]. Apply the same fix as\ncommit f8d8ce1b515a (\"ipv6: fix possible infinite loop in fib6_info_uses_dev()\").\n\nWriters holding tb6_lock can list_del_rcu(&first->fib6_siblings)\nwithout waiting for RCU readers; first->fib6_siblings.next then\nstill points into the old ring and this softirq-side walker never\nreaches &first->fib6_siblings as its terminator. fib6_purge_rt()\nalways WRITE_ONCE()s first->fib6_nsiblings to 0 before\nlist_del_rcu(), so an inside-loop check is a reliable detach signal.\n\n[1] https://sashiko.dev/#/patchset/20260526020227.4857-1-jiayuan.chen%40linux.dev",
      "affected": [
        {
          "vendor": "Linux",
          "product": "Linux",
          "defaultStatus": "unaffected",
          "versions": [
            {
              "version": "d0ec61c9f3583b76aebdbb271f5c0d3fcccd48b2",
              "status": "affected",
              "versionType": "git",
              "lessThan": "3948a7d92f7678e89e1776bb2d169afcad63b1ae"
            },
            {
              "version": "52da02521ede55fb86546c3fffd9377b3261b91f",
              "status": "affected",
              "versionType": "git",
              "lessThan": "c87cd3cb309634bc8f50a54e2079424f219ac21f"
            },
            {
              "version": "34a949e7a0869dfa31a40416d2a56973fae1807b",
              "status": "affected",
              "versionType": "git",
              "lessThan": "0f7b73c3452635de83b8711b31abdda8e49aad7b"
            },
            {
              "version": "d9ccb18f83ea2bb654289b6ecf014fd267cc988b",
              "status": "affected",
              "versionType": "git",
              "lessThan": "ab9a10969a907b472a0196d999c08ff7144172e3"
            },
            {
              "version": "d9ccb18f83ea2bb654289b6ecf014fd267cc988b",
              "status": "affected",
              "versionType": "git",
              "lessThan": "9b9d5bd6e3d4c9cecab5407604b690684b2532d2"
            },
            {
              "version": "d9ccb18f83ea2bb654289b6ecf014fd267cc988b",
              "status": "affected",
              "versionType": "git",
              "lessThan": "9c7da87c2dc860bb17ca1ece942495d28b1ce3b9"
            },
            {
              "version": "11edcd026012ac18acee0f1514db3ed1b160fc6f",
              "status": "affected",
              "versionType": "git"
            },
            {
              "version": "6.1.128",
              "status": "affected",
              "versionType": "semver",
              "lessThan": "6.1.176"
            },
            {
              "version": "6.6.75",
              "status": "affected",
              "versionType": "semver",
              "lessThan": "6.6.143"
            },
            {
              "version": "6.12.2",
              "status": "affected",
              "versionType": "semver",
              "lessThan": "6.12.93"
            },
            {
              "version": "6.11.11",
              "status": "affected",
              "versionType": "semver",
              "lessThan": "6.12"
            }
          ]
        },
        {
          "vendor": "Linux",
          "product": "Linux",
          "defaultStatus": "affected",
          "versions": [
            {
              "version": "6.13",
              "status": "affected"
            },
            {
              "version": "0",
              "status": "unaffected",
              "versionType": "semver",
              "lessThan": "6.13"
            },
            {
              "version": "6.1.176",
              "status": "unaffected",
              "versionType": "semver",
              "lessThanOrEqual": "6.1.*"
            },
            {
              "version": "6.6.143",
              "status": "unaffected",
              "versionType": "semver",
              "lessThanOrEqual": "6.6.*"
            },
            {
              "version": "6.12.93",
              "status": "unaffected",
              "versionType": "semver",
              "lessThanOrEqual": "6.12.*"
            },
            {
              "version": "6.18.35",
              "status": "unaffected",
              "versionType": "semver",
              "lessThanOrEqual": "6.18.*"
            },
            {
              "version": "7.0.12",
              "status": "unaffected",
              "versionType": "semver",
              "lessThanOrEqual": "7.0.*"
            },
            {
              "version": "7.1",
              "status": "unaffected",
              "versionType": "original_commit_for_fix",
              "lessThanOrEqual": "*"
            }
          ]
        }
      ]
    }
  }
}