{"schema":"threatline.record/2","record":{"id":"CVE-2026-98010","aliases":[],"summary":"net/sched: drr: clamp quantum in change class","details":"In the Linux kernel, the following vulnerability has been resolved:\n\nnet/sched: drr: clamp quantum in change class\n\ndrr_change_class() rejects explicit quantum==0 but falls back to\npsched_mtu() with no floor. With a crafted size table qdisc_pkt_len\nreaches ~2 GiB, so quantum=1 (or a zero psched_mtu on a headerless\ndevice) makes the deficit-refill loop spin under the qdisc lock.\n\nAdd clamp_t(u32, quantum, 256, 1<<20) after the zero reject and on the\nfallback path. The explicit-zero reject is preserved.\n\nConditions to recreate the bug:\n  CONFIG_NET_SCH_DRR=y. Requires CAP_NET_ADMIN (namespace-local via\n  unshare -Urn suffices).\n\n  tc qdisc add dev dummy0 root drr\n  tc class add dev dummy0 parent 1: classid 1:1 drr quantum 1","categories":["Operating systems"],"product":"Linux","vendor":"Linux","ecosystem":null,"affected_ranges":[{"source":"CVE List","source_url":"https://www.cve.org/CVERecord?id=CVE-2026-98010","source_modified_at":"2026-10-19T09:12:15.743Z","fetched_at":"2026-10-23T18:45:31.882637Z","product":"Linux","vendor":"Linux","versions":[{"version":"13d2a1d2b032de08d7dcab6a1edcd47802681f96","lessThan":"e2297bbf9cf6ece86f1d1f8c683517a994990f9e","status":"affected","versionType":"git"},{"version":"13d2a1d2b032de08d7dcab6a1edcd47802681f96","lessThan":"560794ee6e040b6e1c4ac2b3c8909f341a4596ee","status":"affected","versionType":"git"},{"version":"13d2a1d2b032de08d7dcab6a1edcd47802681f96","lessThan":"23fea7e6736b2e1c6f6f2f05cccf33d36834da73","status":"affected","versionType":"git"},{"version":"13d2a1d2b032de08d7dcab6a1edcd47802681f96","lessThan":"b464affe9f9dfe41ac48930c376e3fb8596651b0","status":"affected","versionType":"git"},{"version":"13d2a1d2b032de08d7dcab6a1edcd47802681f96","lessThan":"dc8b374214ef5bba4882bbd95b361e42555cfc0d","status":"affected","versionType":"git"},{"version":"13d2a1d2b032de08d7dcab6a1edcd47802681f96","lessThan":"d43cded350fe1218493ad3d37a276aff14108ae6","status":"affected","versionType":"git"},{"version":"13d2a1d2b032de08d7dcab6a1edcd47802681f96","lessThan":"8f756ae1c87414ce9cc21b30e6e4c036d6e9e80b","status":"affected","versionType":"git"},{"version":"13d2a1d2b032de08d7dcab6a1edcd47802681f96","lessThan":"8382abec0f1568d0a5590d75a3df92f23fcf5196","status":"affected","versionType":"git"}],"defaultStatus":"unaffected"},{"source":"CVE List","source_url":"https://www.cve.org/CVERecord?id=CVE-2026-98010","source_modified_at":"2026-10-19T09:12:15.743Z","fetched_at":"2026-10-23T18:45:31.882637Z","product":"Linux","vendor":"Linux","versions":[{"version":"2.6.29","status":"affected"},{"version":"0","lessThan":"2.6.29","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-2026-98010","source_modified_at":"2026-10-19T09:12:15.743Z","fetched_at":"2026-10-23T18:45:31.882637Z","package":{"name":"Linux","ecosystem":null},"version":"560794ee6e040b6e1c4ac2b3c8909f341a4596ee","basis":"first unaffected version stated in the CVE record"},{"source":"CVE List","source_url":"https://www.cve.org/CVERecord?id=CVE-2026-98010","source_modified_at":"2026-10-19T09:12:15.743Z","fetched_at":"2026-10-23T18:45:31.882637Z","package":{"name":"Linux","ecosystem":null},"version":"23fea7e6736b2e1c6f6f2f05cccf33d36834da73","basis":"first unaffected version stated in the CVE record"},{"source":"CVE List","source_url":"https://www.cve.org/CVERecord?id=CVE-2026-98010","source_modified_at":"2026-10-19T09:12:15.743Z","fetched_at":"2026-10-23T18:45:31.882637Z","package":{"name":"Linux","ecosystem":null},"version":"8f756ae1c87414ce9cc21b30e6e4c036d6e9e80b","basis":"first unaffected version stated in the CVE record"},{"source":"CVE List","source_url":"https://www.cve.org/CVERecord?id=CVE-2026-98010","source_modified_at":"2026-10-19T09:12:15.743Z","fetched_at":"2026-10-23T18:45:31.882637Z","package":{"name":"Linux","ecosystem":null},"version":"8382abec0f1568d0a5590d75a3df92f23fcf5196","basis":"first unaffected version stated in the CVE record"}],"cvss":null,"severity":null,"kev":{"listed":false},"epss":{"probability":0.00176,"percentile":0.06837,"score_date":"2026-10-23"},"published_at":"2026-09-25T10:23:34.738Z","modified_at":"2026-10-19T09:12:15.743Z","provenance":[{"source":"CVE List","url":"https://www.cve.org/CVERecord?id=CVE-2026-98010","fetched_at":"2026-10-23T18:45:31.882637Z","source_modified_at":"2026-10-19T09:12:15.743Z"},{"source":"EPSS","url":"https://api.first.org/data/v1/epss?cve=CVE-2026-98010","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/e2297bbf9cf6ece86f1d1f8c683517a994990f9e"},{"source":"CVE List","url":"https://git.kernel.org/stable/c/560794ee6e040b6e1c4ac2b3c8909f341a4596ee"},{"source":"CVE List","url":"https://git.kernel.org/stable/c/23fea7e6736b2e1c6f6f2f05cccf33d36834da73"},{"source":"CVE List","url":"https://git.kernel.org/stable/c/b464affe9f9dfe41ac48930c376e3fb8596651b0"},{"source":"CVE List","url":"https://git.kernel.org/stable/c/dc8b374214ef5bba4882bbd95b361e42555cfc0d"},{"source":"CVE List","url":"https://git.kernel.org/stable/c/d43cded350fe1218493ad3d37a276aff14108ae6"},{"source":"CVE List","url":"https://git.kernel.org/stable/c/8f756ae1c87414ce9cc21b30e6e4c036d6e9e80b"},{"source":"CVE List","url":"https://git.kernel.org/stable/c/8382abec0f1568d0a5590d75a3df92f23fcf5196"}],"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":"2026-10-19T09:12:15.743Z","content_hash":"9c9288c43bc7e21bf5f6a7cf3e02bc89a747047a744ec99b8b90c06789c918ab"}}