{"schema":"threatline.record/2","record":{"id":"CVE-2026-98865","aliases":[],"summary":"sched_ext: Don't run ops.dequeue() with a DSQ lock held","details":"In the Linux kernel, the following vulnerability has been resolved:\n\nsched_ext: Don't run ops.dequeue() with a DSQ lock held\n\nops.dequeue() is invoked with the source user DSQ's lock still held on\nthe consume and move paths (scx_consume_dispatch_q(),\nmove_task_between_dsqs()). A BPF scheduler which locks the source user\nDSQ from ops.dequeue() - e.g. by iterating it with bpf_iter_scx_dsq -\nself-deadlocks.\n\nops.dequeue() can only call the \"any\" kfuncs and none of them can lock a\nbuiltin DSQ, so the global and bypass paths can't deadlock; however,\nall DSQ locks share one lockdep class, so iterating any user DSQ from\nops.dequeue() on those paths trips the recursion check.\n\nMove the invocation after the DSQ unlock on all three paths.\nSCX_TASK_IN_CUSTODY is cleared under the lock serializing the transfer\nso that the callback is invoked exactly once.","categories":["Operating systems"],"product":"Linux","vendor":"Linux","ecosystem":null,"affected_ranges":[{"source":"CVE List","source_url":"https://www.cve.org/CVERecord?id=CVE-2026-98865","source_modified_at":"2026-10-19T09:26:59.604Z","fetched_at":"2026-10-23T18:45:31.882637Z","product":"Linux","vendor":"Linux","versions":[{"version":"ebf1ccff79c43f860cbd2f9d6cfab9a462d0cb2d","lessThan":"fe499ae9da46e297f578d4346c4c8e338c3118db","status":"affected","versionType":"git"},{"version":"ebf1ccff79c43f860cbd2f9d6cfab9a462d0cb2d","lessThan":"cb86607ada73185f321baa7f9d94a08a3a40bbf5","status":"affected","versionType":"git"}],"defaultStatus":"unaffected"},{"source":"CVE List","source_url":"https://www.cve.org/CVERecord?id=CVE-2026-98865","source_modified_at":"2026-10-19T09:26:59.604Z","fetched_at":"2026-10-23T18:45:31.882637Z","product":"Linux","vendor":"Linux","versions":[{"version":"7.1","status":"affected"},{"version":"0","lessThan":"7.1","status":"unaffected","versionType":"semver"},{"version":"7.2.10","lessThanOrEqual":"7.2.*","status":"unaffected","versionType":"semver"},{"version":"7.3","lessThanOrEqual":"*","status":"unaffected","versionType":"original_commit_for_fix"}],"defaultStatus":"affected"}],"fixed_versions":[],"cvss":null,"severity":null,"kev":{"listed":false},"epss":{"probability":0.00168,"percentile":0.05877,"score_date":"2026-10-23"},"published_at":"2026-10-18T15:51:26.449Z","modified_at":"2026-10-19T09:26:59.604Z","provenance":[{"source":"CVE List","url":"https://www.cve.org/CVERecord?id=CVE-2026-98865","fetched_at":"2026-10-23T18:45:31.882637Z","source_modified_at":"2026-10-19T09:26:59.604Z"},{"source":"EPSS","url":"https://api.first.org/data/v1/epss?cve=CVE-2026-98865","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/fe499ae9da46e297f578d4346c4c8e338c3118db"},{"source":"CVE List","url":"https://git.kernel.org/stable/c/cb86607ada73185f321baa7f9d94a08a3a40bbf5"}],"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":"2026-10-19T09:26:59.604Z","content_hash":"891ca19fb4a03d37251facecfb41f2233f07a0e2d1c441d7ba1a31b34720d0dc"}}