{"schema":"threatline.record/2","record":{"id":"CVE-2026-98009","aliases":[],"summary":"net/sched: ets: clamp quantum in parse and fallback paths","details":"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","categories":["Operating systems"],"product":"Linux","vendor":"Linux","ecosystem":null,"affected_ranges":[{"source":"CVE List","source_url":"https://www.cve.org/CVERecord?id=CVE-2026-98009","source_modified_at":"2026-10-19T09:12:14.751Z","fetched_at":"2026-10-23T18:45:31.882637Z","product":"Linux","vendor":"Linux","versions":[{"version":"dcc68b4d8084e1ac9af0d4022d6b1aff6a139a33","lessThan":"440b66cc7b56ea38e9b878ae88da91992efaa4c4","status":"affected","versionType":"git"},{"version":"dcc68b4d8084e1ac9af0d4022d6b1aff6a139a33","lessThan":"4ef8664eafafc8db68a1d52601f17dc008a223b7","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"}],"defaultStatus":"unaffected"},{"source":"CVE List","source_url":"https://www.cve.org/CVERecord?id=CVE-2026-98009","source_modified_at":"2026-10-19T09:12:14.751Z","fetched_at":"2026-10-23T18:45:31.882637Z","product":"Linux","vendor":"Linux","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"}],"defaultStatus":"affected"}],"fixed_versions":[{"source":"CVE List","source_url":"https://www.cve.org/CVERecord?id=CVE-2026-98009","source_modified_at":"2026-10-19T09:12:14.751Z","fetched_at":"2026-10-23T18:45:31.882637Z","package":{"name":"Linux","ecosystem":null},"version":"440b66cc7b56ea38e9b878ae88da91992efaa4c4","basis":"first unaffected version stated in the CVE record"},{"source":"CVE List","source_url":"https://www.cve.org/CVERecord?id=CVE-2026-98009","source_modified_at":"2026-10-19T09:12:14.751Z","fetched_at":"2026-10-23T18:45:31.882637Z","package":{"name":"Linux","ecosystem":null},"version":"4ef8664eafafc8db68a1d52601f17dc008a223b7","basis":"first unaffected version stated in the CVE record"},{"source":"CVE List","source_url":"https://www.cve.org/CVERecord?id=CVE-2026-98009","source_modified_at":"2026-10-19T09:12:14.751Z","fetched_at":"2026-10-23T18:45:31.882637Z","package":{"name":"Linux","ecosystem":null},"version":"8b8d782c3b96376217087767dcf662cd3d25f226","basis":"first unaffected version stated in the CVE record"},{"source":"CVE 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List","url":"https://git.kernel.org/stable/c/440b66cc7b56ea38e9b878ae88da91992efaa4c4"},{"source":"CVE List","url":"https://git.kernel.org/stable/c/4ef8664eafafc8db68a1d52601f17dc008a223b7"},{"source":"CVE List","url":"https://git.kernel.org/stable/c/8b8d782c3b96376217087767dcf662cd3d25f226"},{"source":"CVE List","url":"https://git.kernel.org/stable/c/226d2702e74a570f5bfae6115b4706da4b94e5cf"},{"source":"CVE List","url":"https://git.kernel.org/stable/c/99ae477b892e203a37985ebc56f0063e072f7f4b"},{"source":"CVE List","url":"https://git.kernel.org/stable/c/8f80b113dea0bed3c1a31a4224b72775cd9ec52d"},{"source":"CVE List","url":"https://git.kernel.org/stable/c/de22c30ec5598aca8797f02082d2ee1358dfa3ff"},{"source":"CVE List","url":"https://git.kernel.org/stable/c/1c38487f46b243bfeefec0c0c86023a3904f2214"}],"locations":[],"motoko_assessment":{"status":"requires_architecture_review","automatic_remediation":false},"cve_state":"PUBLISHED","classification":{"method":"product-first software-layer rules","rules_version":"2.1","matched_on":"product","confidence":"heuristic","reviewed":false},"change_timestamp":"2026-10-19T09:12:14.751Z","content_hash":"88f8df2f0f190df257e3a2b9e3338b8029456c90a8f2149fda9fed5ff772ab7a"}}