{
  "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-2026-63971",
    "sourceURL": "https://www.cve.org/CVERecord?id=CVE-2026-63971",
    "idYear": 2026,
    "status": "PUBLISHED",
    "publishedAt": "2026-07-19T14:55:57.792Z",
    "updatedAt": "2026-10-19T20:17:59.440Z",
    "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": "sctp: fix race between sctp_wait_for_connect and peeloff",
      "summary": "In the Linux kernel, the following vulnerability has been resolved:\n\nsctp: fix race between sctp_wait_for_connect and peeloff\n\nsctp_wait_for_connect() drops and re-acquires the socket lock while\nwaiting for the association to reach ESTABLISHED state. During this\nwindow, another thread can peeloff the association to a new socket via\ngetsockopt(SCTP_SOCKOPT_PEELOFF), changing asoc->base.sk. After\nre-acquiring the old socket lock, sctp_wait_for_connect() returns\nsuccess without noticing the migration — the caller then accesses\nthe association under the wrong lock in sctp_datamsg_from_user().\n\nAdd the same sk != asoc->base.sk check that sctp_wait_for_sndbuf()\nalready has, returning an error if the association was migrated while\nwe slept.",
      "affected": [
        {
          "vendor": "Linux",
          "product": "Linux",
          "defaultStatus": "unaffected",
          "versions": [
            {
              "version": "668c9beb9020d5834ee9e43c208190a07d2b1928",
              "status": "affected",
              "versionType": "git",
              "lessThan": "0e0d5bc76fd4267a71334fcc8f1a5fbcf997845d"
            },
            {
              "version": "668c9beb9020d5834ee9e43c208190a07d2b1928",
              "status": "affected",
              "versionType": "git",
              "lessThan": "bcfeac79af740735ace44008b4a11b8e5add20f5"
            },
            {
              "version": "668c9beb9020d5834ee9e43c208190a07d2b1928",
              "status": "affected",
              "versionType": "git",
              "lessThan": "8e9b56051d24540cfbf39194618708c4a7633549"
            },
            {
              "version": "668c9beb9020d5834ee9e43c208190a07d2b1928",
              "status": "affected",
              "versionType": "git",
              "lessThan": "634a9af8a26a84d8b0d7b3b643204b344b42d9fb"
            },
            {
              "version": "668c9beb9020d5834ee9e43c208190a07d2b1928",
              "status": "affected",
              "versionType": "git",
              "lessThan": "7d2038d4b80166f7bead8d07eba3b97405816c21"
            },
            {
              "version": "668c9beb9020d5834ee9e43c208190a07d2b1928",
              "status": "affected",
              "versionType": "git",
              "lessThan": "68667ee4c7dadf7f63167234e2a1af09b3f7874e"
            },
            {
              "version": "668c9beb9020d5834ee9e43c208190a07d2b1928",
              "status": "affected",
              "versionType": "git",
              "lessThan": "6140cfa721451fa6e18e134e709703c2bf34d0fb"
            },
            {
              "version": "668c9beb9020d5834ee9e43c208190a07d2b1928",
              "status": "affected",
              "versionType": "git",
              "lessThan": "f14fe6395a8b3d961a61e138ad7b36ba3626dd4e"
            }
          ]
        },
        {
          "vendor": "Linux",
          "product": "Linux",
          "defaultStatus": "affected",
          "versions": [
            {
              "version": "4.16",
              "status": "affected"
            },
            {
              "version": "0",
              "status": "unaffected",
              "versionType": "semver",
              "lessThan": "4.16"
            },
            {
              "version": "5.10.259",
              "status": "unaffected",
              "versionType": "semver",
              "lessThanOrEqual": "5.10.*"
            },
            {
              "version": "5.15.210",
              "status": "unaffected",
              "versionType": "semver",
              "lessThanOrEqual": "5.15.*"
            },
            {
              "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": "*"
            }
          ]
        }
      ]
    }
  }
}