{
  "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-2026-68338",
    "sourceURL": "https://www.cve.org/CVERecord?id=CVE-2026-68338",
    "idYear": 2026,
    "status": "PUBLISHED",
    "publishedAt": "2026-08-10T12:03:14.549Z",
    "updatedAt": "2026-10-19T21:09:05.428Z",
    "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": "net/packet: avoid fanout hook re-registration after unregister",
      "summary": "In the Linux kernel, the following vulnerability has been resolved:\n\nnet/packet: avoid fanout hook re-registration after unregister\n\npacket_set_ring() temporarily detaches a socket from packet delivery while\nreconfiguring its ring. It records the previous running state, clears\npo->num, unregisters the protocol hook when needed, drops po->bind_lock,\nand later restores po->num and re-registers the hook from the saved\nwas_running value.\n\nThat unlocked window can race with NETDEV_UNREGISTER. The notifier can\nobserve the socket as not running, skip __unregister_prot_hook(), and\ninvalidate the per-socket binding by setting po->ifindex to -1 and clearing\npo->prot_hook.dev. A one-member fanout group can still retain its shared\nfanout hook device pointer. When packet_set_ring() resumes, re-registering\nsolely from the stale was_running state can re-add the fanout hook after\nthe device has been unregistered.\n\nTreat po->ifindex == -1 as an invalidated binding after reacquiring\npo->bind_lock. This is distinct from ifindex 0, the normal\nunbound/wildcard state: ifindex -1 marks an existing device binding that\nwas invalidated when the device was unregistered. Restore po->num as\nbefore, but do not re-register the hook if device unregister already\ndetached the socket.",
      "affected": [
        {
          "vendor": "Linux",
          "product": "Linux",
          "defaultStatus": "unaffected",
          "versions": [
            {
              "version": "dc99f600698dcac69b8f56dda9a8a00d645c5ffc",
              "status": "affected",
              "versionType": "git",
              "lessThan": "acb40ebfa5c4d62f84339fcbf713f2a9fd033a71"
            },
            {
              "version": "dc99f600698dcac69b8f56dda9a8a00d645c5ffc",
              "status": "affected",
              "versionType": "git",
              "lessThan": "c820f4b7f2fa38f8769db0d0cefdd94e2721504d"
            },
            {
              "version": "dc99f600698dcac69b8f56dda9a8a00d645c5ffc",
              "status": "affected",
              "versionType": "git",
              "lessThan": "4628efbdc7affd094181f5263e65c1062e31f15f"
            },
            {
              "version": "dc99f600698dcac69b8f56dda9a8a00d645c5ffc",
              "status": "affected",
              "versionType": "git",
              "lessThan": "80ec024d53a05c60ad1d08968dcf745f10c1665c"
            },
            {
              "version": "dc99f600698dcac69b8f56dda9a8a00d645c5ffc",
              "status": "affected",
              "versionType": "git",
              "lessThan": "0a052e0808e015e68144a9877e6ef42b952c49fa"
            },
            {
              "version": "dc99f600698dcac69b8f56dda9a8a00d645c5ffc",
              "status": "affected",
              "versionType": "git",
              "lessThan": "1bc55c29cd85818e9052f17deb287d5a11fb817f"
            },
            {
              "version": "dc99f600698dcac69b8f56dda9a8a00d645c5ffc",
              "status": "affected",
              "versionType": "git",
              "lessThan": "a885387dae7986a55bae5c77a15bdd447f64e9b9"
            },
            {
              "version": "dc99f600698dcac69b8f56dda9a8a00d645c5ffc",
              "status": "affected",
              "versionType": "git",
              "lessThan": "50aff80475abd3533eef4320477037e6fcc6b56e"
            }
          ]
        },
        {
          "vendor": "Linux",
          "product": "Linux",
          "defaultStatus": "affected",
          "versions": [
            {
              "version": "3.1",
              "status": "affected"
            },
            {
              "version": "0",
              "status": "unaffected",
              "versionType": "semver",
              "lessThan": "3.1"
            },
            {
              "version": "5.10.265",
              "status": "unaffected",
              "versionType": "semver",
              "lessThanOrEqual": "5.10.*"
            },
            {
              "version": "5.15.216",
              "status": "unaffected",
              "versionType": "semver",
              "lessThanOrEqual": "5.15.*"
            },
            {
              "version": "6.1.183",
              "status": "unaffected",
              "versionType": "semver",
              "lessThanOrEqual": "6.1.*"
            },
            {
              "version": "6.6.148",
              "status": "unaffected",
              "versionType": "semver",
              "lessThanOrEqual": "6.6.*"
            },
            {
              "version": "6.12.101",
              "status": "unaffected",
              "versionType": "semver",
              "lessThanOrEqual": "6.12.*"
            },
            {
              "version": "6.18.42",
              "status": "unaffected",
              "versionType": "semver",
              "lessThanOrEqual": "6.18.*"
            },
            {
              "version": "7.1.6",
              "status": "unaffected",
              "versionType": "semver",
              "lessThanOrEqual": "7.1.*"
            },
            {
              "version": "7.2",
              "status": "unaffected",
              "versionType": "original_commit_for_fix",
              "lessThanOrEqual": "*"
            }
          ]
        }
      ]
    }
  }
}