{
    "dataType": "CVE_RECORD",
    "dataVersion": "5.2",
    "cveMetadata": {
        "cveId": "CVE-2026-98013",
        "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "state": "PUBLISHED",
        "assignerShortName": "Linux",
        "dateReserved": "2026-09-25T10:19:56.069Z",
        "datePublished": "2026-09-25T10:23:36.527Z",
        "dateUpdated": "2026-10-19T09:12:18.653Z"
    },
    "containers": {
        "cna": {
            "providerMetadata": {
                "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
                "shortName": "Linux",
                "dateUpdated": "2026-10-19T09:12:18.653Z"
            },
            "descriptions": [
                {
                    "lang": "en",
                    "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nnet/sched: fq_pie: clamp quantum in change path\n\nfq_pie_change() accepts any quantum value from userspace, including 1.\nWith a crafted size table qdisc_pkt_len reaches ~2 GiB, so quantum=1\nmakes the deficit-refill loop spin ~2^31 times under the qdisc lock\n(a soft lockup / denial of service).\n\nAdd max(256U, ...) matching fq_codel_change().\n\nConditions to recreate the bug:\n  CONFIG_NET_SCH_FQ_PIE=y. Requires CAP_NET_ADMIN (namespace-local via\n  unshare -Urn suffices).\n\n  tc qdisc add dev dummy0 root fq_pie\n  tc qdisc change dev dummy0 root fq_pie quantum 1 stab data 32768 size_log 15 cell_log 0"
                }
            ],
            "affected": [
                {
                    "product": "Linux",
                    "vendor": "Linux",
                    "defaultStatus": "unaffected",
                    "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
                    "programFiles": [
                        "net/sched/sch_fq_pie.c"
                    ],
                    "versions": [
                        {
                            "version": "ec97ecf1ebe485a17cd8395a5f35e6b80b57665a",
                            "lessThan": "ff4f3a0f3abd2ded467931d7da7984a68a768e0b",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "ec97ecf1ebe485a17cd8395a5f35e6b80b57665a",
                            "lessThan": "749aaebc1eb92ce2f38fd3caf68a2f99686d84ef",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "ec97ecf1ebe485a17cd8395a5f35e6b80b57665a",
                            "lessThan": "8fd98e56c41f79278eeb67512c28d7abc175bcf4",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "ec97ecf1ebe485a17cd8395a5f35e6b80b57665a",
                            "lessThan": "215df1e953ae72a09d425ec188e054058ae23dc9",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "ec97ecf1ebe485a17cd8395a5f35e6b80b57665a",
                            "lessThan": "f90fe65b977e7aa9eb302230a09eb18f8c32ceaa",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "ec97ecf1ebe485a17cd8395a5f35e6b80b57665a",
                            "lessThan": "c11e3a39807eb5a200445ae9082843ab86800415",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "ec97ecf1ebe485a17cd8395a5f35e6b80b57665a",
                            "lessThan": "6655b56e2801008566c594ef231f6c7b3f716c61",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "ec97ecf1ebe485a17cd8395a5f35e6b80b57665a",
                            "lessThan": "4864f58c53eb47257d55e01f47d4a9f355f7f970",
                            "status": "affected",
                            "versionType": "git"
                        }
                    ]
                },
                {
                    "product": "Linux",
                    "vendor": "Linux",
                    "defaultStatus": "affected",
                    "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
                    "programFiles": [
                        "net/sched/sch_fq_pie.c"
                    ],
                    "versions": [
                        {
                            "version": "5.6",
                            "status": "affected"
                        },
                        {
                            "version": "0",
                            "lessThan": "5.6",
                            "status": "unaffected",
                            "versionType": "semver"
                        },
                        {
                            "version": "5.10.271",
                            "lessThanOrEqual": "5.10.*",
                            "status": "unaffected",
                            "versionType": "semver"
                        },
                        {
                            "version": "5.15.222",
                            "lessThanOrEqual": "5.15.*",
                            "status": "unaffected",
                            "versionType": "semver"
                        },
                        {
                            "version": "6.1.189",
                            "lessThanOrEqual": "6.1.*",
                            "status": "unaffected",
                            "versionType": "semver"
                        },
                        {
                            "version": "6.6.158",
                            "lessThanOrEqual": "6.6.*",
                            "status": "unaffected",
                            "versionType": "semver"
                        },
                        {
                            "version": "6.12.111",
                            "lessThanOrEqual": "6.12.*",
                            "status": "unaffected",
                            "versionType": "semver"
                        },
                        {
                            "version": "6.18.53",
                            "lessThanOrEqual": "6.18.*",
                            "status": "unaffected",
                            "versionType": "semver"
                        },
                        {
                            "version": "7.2.7",
                            "lessThanOrEqual": "7.2.*",
                            "status": "unaffected",
                            "versionType": "semver"
                        },
                        {
                            "version": "7.3",
                            "lessThanOrEqual": "*",
                            "status": "unaffected",
                            "versionType": "original_commit_for_fix"
                        }
                    ]
                }
            ],
            "cpeApplicability": [
                {
                    "nodes": [
                        {
                            "operator": "OR",
                            "negate": false,
                            "cpeMatch": [
                                {
                                    "vulnerable": true,
                                    "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                                    "versionStartIncluding": "5.6",
                                    "versionEndExcluding": "5.10.271"
                                },
                                {
                                    "vulnerable": true,
                                    "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                                    "versionStartIncluding": "5.6",
                                    "versionEndExcluding": "5.15.222"
                                },
                                {
                                    "vulnerable": true,
                                    "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                                    "versionStartIncluding": "5.6",
                                    "versionEndExcluding": "6.1.189"
                                },
                                {
                                    "vulnerable": true,
                                    "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                                    "versionStartIncluding": "5.6",
                                    "versionEndExcluding": "6.6.158"
                                },
                                {
                                    "vulnerable": true,
                                    "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                                    "versionStartIncluding": "5.6",
                                    "versionEndExcluding": "6.12.111"
                                },
                                {
                                    "vulnerable": true,
                                    "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                                    "versionStartIncluding": "5.6",
                                    "versionEndExcluding": "6.18.53"
                                },
                                {
                                    "vulnerable": true,
                                    "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                                    "versionStartIncluding": "5.6",
                                    "versionEndExcluding": "7.2.7"
                                },
                                {
                                    "vulnerable": true,
                                    "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                                    "versionStartIncluding": "5.6",
                                    "versionEndExcluding": "7.3"
                                }
                            ]
                        }
                    ]
                }
            ],
            "references": [
                {
                    "url": "https://git.kernel.org/stable/c/ff4f3a0f3abd2ded467931d7da7984a68a768e0b"
                },
                {
                    "url": "https://git.kernel.org/stable/c/749aaebc1eb92ce2f38fd3caf68a2f99686d84ef"
                },
                {
                    "url": "https://git.kernel.org/stable/c/8fd98e56c41f79278eeb67512c28d7abc175bcf4"
                },
                {
                    "url": "https://git.kernel.org/stable/c/215df1e953ae72a09d425ec188e054058ae23dc9"
                },
                {
                    "url": "https://git.kernel.org/stable/c/f90fe65b977e7aa9eb302230a09eb18f8c32ceaa"
                },
                {
                    "url": "https://git.kernel.org/stable/c/c11e3a39807eb5a200445ae9082843ab86800415"
                },
                {
                    "url": "https://git.kernel.org/stable/c/6655b56e2801008566c594ef231f6c7b3f716c61"
                },
                {
                    "url": "https://git.kernel.org/stable/c/4864f58c53eb47257d55e01f47d4a9f355f7f970"
                }
            ],
            "title": "net/sched: fq_pie: clamp quantum in change path",
            "x_generator": {
                "engine": "bippy-1.2.0"
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    }
}