{
    "dataType": "CVE_RECORD",
    "dataVersion": "5.2",
    "cveMetadata": {
        "cveId": "CVE-2026-98009",
        "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "state": "PUBLISHED",
        "assignerShortName": "Linux",
        "dateReserved": "2026-09-25T10:19:56.068Z",
        "datePublished": "2026-09-25T10:23:34.144Z",
        "dateUpdated": "2026-10-19T09:12:14.751Z"
    },
    "containers": {
        "cna": {
            "providerMetadata": {
                "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
                "shortName": "Linux",
                "dateUpdated": "2026-10-19T09:12:14.751Z"
            },
            "descriptions": [
                {
                    "lang": "en",
                    "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nnet/sched: ets: clamp quantum in parse and fallback paths\n\nets_qdisc_change() falls back to psched_mtu() with no floor for bands\nwithout an explicit quantum. With a crafted size table qdisc_pkt_len\nreaches ~2 GiB, so a zero psched_mtu on a headerless device makes the\ndeficit-refill loop spin under the qdisc lock.\n\nMove the floor into ets_quantum_parse() so explicitly configured quanta\nare also clamped to [256, 1<<20], not just the fallback path.\n\nConditions to recreate the bug:\n  CONFIG_NET_SCH_ETS=y. Requires CAP_NET_ADMIN (namespace-local via\n  unshare -Urn suffices).\n\n  tc qdisc add dev dummy0 root ets bands 3 strict 2 quanta 1 1"
                }
            ],
            "affected": [
                {
                    "product": "Linux",
                    "vendor": "Linux",
                    "defaultStatus": "unaffected",
                    "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
                    "programFiles": [
                        "net/sched/sch_ets.c"
                    ],
                    "versions": [
                        {
                            "version": "dcc68b4d8084e1ac9af0d4022d6b1aff6a139a33",
                            "lessThan": "440b66cc7b56ea38e9b878ae88da91992efaa4c4",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
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                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "dcc68b4d8084e1ac9af0d4022d6b1aff6a139a33",
                            "lessThan": "8b8d782c3b96376217087767dcf662cd3d25f226",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "dcc68b4d8084e1ac9af0d4022d6b1aff6a139a33",
                            "lessThan": "226d2702e74a570f5bfae6115b4706da4b94e5cf",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "dcc68b4d8084e1ac9af0d4022d6b1aff6a139a33",
                            "lessThan": "99ae477b892e203a37985ebc56f0063e072f7f4b",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "dcc68b4d8084e1ac9af0d4022d6b1aff6a139a33",
                            "lessThan": "8f80b113dea0bed3c1a31a4224b72775cd9ec52d",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "dcc68b4d8084e1ac9af0d4022d6b1aff6a139a33",
                            "lessThan": "de22c30ec5598aca8797f02082d2ee1358dfa3ff",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "dcc68b4d8084e1ac9af0d4022d6b1aff6a139a33",
                            "lessThan": "1c38487f46b243bfeefec0c0c86023a3904f2214",
                            "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_ets.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": [
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                                    "vulnerable": true,
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            "references": [
                {
                    "url": "https://git.kernel.org/stable/c/440b66cc7b56ea38e9b878ae88da91992efaa4c4"
                },
                {
                    "url": "https://git.kernel.org/stable/c/4ef8664eafafc8db68a1d52601f17dc008a223b7"
                },
                {
                    "url": "https://git.kernel.org/stable/c/8b8d782c3b96376217087767dcf662cd3d25f226"
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                {
                    "url": "https://git.kernel.org/stable/c/226d2702e74a570f5bfae6115b4706da4b94e5cf"
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                    "url": "https://git.kernel.org/stable/c/99ae477b892e203a37985ebc56f0063e072f7f4b"
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                },
                {
                    "url": "https://git.kernel.org/stable/c/de22c30ec5598aca8797f02082d2ee1358dfa3ff"
                },
                {
                    "url": "https://git.kernel.org/stable/c/1c38487f46b243bfeefec0c0c86023a3904f2214"
                }
            ],
            "title": "net/sched: ets: clamp quantum in parse and fallback paths",
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}