{"schema":"threatline.record/2","record":{"id":"CVE-2026-98013","aliases":[],"summary":"net/sched: fq_pie: clamp quantum in change path","details":"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","categories":["Operating systems"],"product":"Linux","vendor":"Linux","ecosystem":null,"affected_ranges":[{"source":"CVE List","source_url":"https://www.cve.org/CVERecord?id=CVE-2026-98013","source_modified_at":"2026-10-19T09:12:18.653Z","fetched_at":"2026-10-23T18:45:31.882637Z","product":"Linux","vendor":"Linux","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"}],"defaultStatus":"unaffected"},{"source":"CVE List","source_url":"https://www.cve.org/CVERecord?id=CVE-2026-98013","source_modified_at":"2026-10-19T09:12:18.653Z","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-2026-98013","source_modified_at":"2026-10-19T09:12:18.653Z","fetched_at":"2026-10-23T18:45:31.882637Z","package":{"name":"Linux","ecosystem":null},"version":"749aaebc1eb92ce2f38fd3caf68a2f99686d84ef","basis":"first unaffected version stated in the CVE record"},{"source":"CVE List","source_url":"https://www.cve.org/CVERecord?id=CVE-2026-98013","source_modified_at":"2026-10-19T09:12:18.653Z","fetched_at":"2026-10-23T18:45:31.882637Z","package":{"name":"Linux","ecosystem":null},"version":"8fd98e56c41f79278eeb67512c28d7abc175bcf4","basis":"first unaffected version stated in the CVE record"},{"source":"CVE List","source_url":"https://www.cve.org/CVERecord?id=CVE-2026-98013","source_modified_at":"2026-10-19T09:12:18.653Z","fetched_at":"2026-10-23T18:45:31.882637Z","package":{"name":"Linux","ecosystem":null},"version":"215df1e953ae72a09d425ec188e054058ae23dc9","basis":"first unaffected version stated in the CVE record"},{"source":"CVE List","source_url":"https://www.cve.org/CVERecord?id=CVE-2026-98013","source_modified_at":"2026-10-19T09:12:18.653Z","fetched_at":"2026-10-23T18:45:31.882637Z","package":{"name":"Linux","ecosystem":null},"version":"6655b56e2801008566c594ef231f6c7b3f716c61","basis":"first unaffected version stated in the CVE record"},{"source":"CVE List","source_url":"https://www.cve.org/CVERecord?id=CVE-2026-98013","source_modified_at":"2026-10-19T09:12:18.653Z","fetched_at":"2026-10-23T18:45:31.882637Z","package":{"name":"Linux","ecosystem":null},"version":"4864f58c53eb47257d55e01f47d4a9f355f7f970","basis":"first unaffected version stated in the CVE record"}],"cvss":null,"severity":null,"kev":{"listed":false},"epss":{"probability":0.00176,"percentile":0.06836,"score_date":"2026-10-23"},"published_at":"2026-09-25T10:23:36.527Z","modified_at":"2026-10-19T09:12:18.653Z","provenance":[{"source":"CVE List","url":"https://www.cve.org/CVERecord?id=CVE-2026-98013","fetched_at":"2026-10-23T18:45:31.882637Z","source_modified_at":"2026-10-19T09:12:18.653Z"},{"source":"EPSS","url":"https://api.first.org/data/v1/epss?cve=CVE-2026-98013","fetched_at":"2026-10-23T18:42:43.628194Z","source_modified_at":"2026-10-23"}],"sources":["CVE List","EPSS"],"references":[{"source":"CVE List","url":"https://git.kernel.org/stable/c/ff4f3a0f3abd2ded467931d7da7984a68a768e0b"},{"source":"CVE List","url":"https://git.kernel.org/stable/c/749aaebc1eb92ce2f38fd3caf68a2f99686d84ef"},{"source":"CVE List","url":"https://git.kernel.org/stable/c/8fd98e56c41f79278eeb67512c28d7abc175bcf4"},{"source":"CVE List","url":"https://git.kernel.org/stable/c/215df1e953ae72a09d425ec188e054058ae23dc9"},{"source":"CVE List","url":"https://git.kernel.org/stable/c/f90fe65b977e7aa9eb302230a09eb18f8c32ceaa"},{"source":"CVE List","url":"https://git.kernel.org/stable/c/c11e3a39807eb5a200445ae9082843ab86800415"},{"source":"CVE List","url":"https://git.kernel.org/stable/c/6655b56e2801008566c594ef231f6c7b3f716c61"},{"source":"CVE List","url":"https://git.kernel.org/stable/c/4864f58c53eb47257d55e01f47d4a9f355f7f970"}],"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":"2026-10-19T09:12:18.653Z","content_hash":"1cfd833bbd85e6dce85f169b06b276df06e5a32300fb17c17ac28bf87c519c37"}}