{
  "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-2026-98011",
    "sourceURL": "https://www.cve.org/CVERecord?id=CVE-2026-98011",
    "idYear": 2026,
    "status": "PUBLISHED",
    "publishedAt": "2026-09-25T10:23:35.338Z",
    "updatedAt": "2026-10-19T09:12:16.718Z",
    "importedAt": "2026-10-24T01:58:41.756Z",
    "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/sched: hhf: clamp quantum in change and init paths",
      "summary": "In the Linux kernel, the following vulnerability has been resolved:\n\nnet/sched: hhf: clamp quantum in change and init paths\n\nhhf_change() accepts any quantum from userspace, including 1. With a\ncrafted size table qdisc_pkt_len reaches ~2 GiB, so quantum=1 makes\nthe deficit-refill loop spin ~2^31 times under the qdisc lock\n(a soft lockup / denial of service).\n\nAdd max(256U, ...) in hhf_change() matching fq_codel_change(). Clamp\nhhf_init() to [256, 1<<20] matching the siblings, and remove the old\nfallback that only set quantum=256 on overflow.\n\nConditions to recreate the bug:\n  CONFIG_NET_SCH_HHF=y. Requires CAP_NET_ADMIN (namespace-local via\n  unshare -Urn suffices).\n\n  tc qdisc add dev dummy0 root hhf\n  tc qdisc change dev dummy0 root hhf quantum 1 stab data 32768 size_log 15 cell_log 0",
      "affected": [
        {
          "vendor": "Linux",
          "product": "Linux",
          "defaultStatus": "unaffected",
          "versions": [
            {
              "version": "10239edf86f137ce4c39b62ea9575e8053c549a0",
              "status": "affected",
              "versionType": "git",
              "lessThan": "a328698d046098e6f55b3b1460cac6bab577be58"
            },
            {
              "version": "10239edf86f137ce4c39b62ea9575e8053c549a0",
              "status": "affected",
              "versionType": "git",
              "lessThan": "c364ad3ab3c8a6bce469a5cbf02881ab1324c5da"
            },
            {
              "version": "10239edf86f137ce4c39b62ea9575e8053c549a0",
              "status": "affected",
              "versionType": "git",
              "lessThan": "2c6dd9fc86d446a03728c43f3b96d9ae29aa058f"
            },
            {
              "version": "10239edf86f137ce4c39b62ea9575e8053c549a0",
              "status": "affected",
              "versionType": "git",
              "lessThan": "6570f326a6a96bedf3d1d1dab6acc9f8c29104ec"
            },
            {
              "version": "10239edf86f137ce4c39b62ea9575e8053c549a0",
              "status": "affected",
              "versionType": "git",
              "lessThan": "1113b674307ffddd402524bd1fd9d7d5629b705b"
            },
            {
              "version": "10239edf86f137ce4c39b62ea9575e8053c549a0",
              "status": "affected",
              "versionType": "git",
              "lessThan": "2e77947bbf6c166e76c038663832d0914418f761"
            },
            {
              "version": "10239edf86f137ce4c39b62ea9575e8053c549a0",
              "status": "affected",
              "versionType": "git",
              "lessThan": "0898c6f9fa9ce2632ae88bd0f34a878ccc6335af"
            },
            {
              "version": "10239edf86f137ce4c39b62ea9575e8053c549a0",
              "status": "affected",
              "versionType": "git",
              "lessThan": "eb56a495f59baf6cad5ed80e3ffb9078098b1346"
            }
          ]
        },
        {
          "vendor": "Linux",
          "product": "Linux",
          "defaultStatus": "affected",
          "versions": [
            {
              "version": "3.14",
              "status": "affected"
            },
            {
              "version": "0",
              "status": "unaffected",
              "versionType": "semver",
              "lessThan": "3.14"
            },
            {
              "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": "6.6.158",
              "status": "unaffected",
              "versionType": "semver",
              "lessThanOrEqual": "6.6.*"
            },
            {
              "version": "6.12.111",
              "status": "unaffected",
              "versionType": "semver",
              "lessThanOrEqual": "6.12.*"
            },
            {
              "version": "6.18.53",
              "status": "unaffected",
              "versionType": "semver",
              "lessThanOrEqual": "6.18.*"
            },
            {
              "version": "7.2.7",
              "status": "unaffected",
              "versionType": "semver",
              "lessThanOrEqual": "7.2.*"
            },
            {
              "version": "7.3",
              "status": "unaffected",
              "versionType": "original_commit_for_fix",
              "lessThanOrEqual": "*"
            }
          ]
        }
      ]
    }
  }
}