{"id":"CVE-2026-99269","title":"sched_ext: Wait for SCX_OPSS_DISPATCHING before moving tasks off DSQs","summary":"In the Linux kernel, the following vulnerability has been resolved:\n\nsched_ext: Wait for SCX_OPSS_DISPATCHING before moving tasks off DSQs\n\nA task can be found on a non-local DSQ while the CPU which dispatched it\nis still running ops.deq…","severity":"high","cvss":7.8,"cvssVector":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H","cvssSource":"cna","vendor":"Linux","product":"Linux","affected":["Linux >= ebf1ccff79c43f860cbd2f9d6cfab9a462d0cb2d < cc2839946328c1618b3870d521b32bb9483d49d0","Linux >= ebf1ccff79c43f860cbd2f9d6cfab9a462d0cb2d < 2935062be77113c1c4565ca9d0c72180449aafee","Linux 7.1"],"published":"2026-11-03","updated":"2026-11-03","sourceUpdated":"2026-11-03T19:14:42.052Z","source":"CVEORG","sourceUrl":"https://www.cve.org/CVERecord?id=CVE-2026-99269","references":[{"url":"https://git.kernel.org/stable/c/cc2839946328c1618b3870d521b32bb9483d49d0"},{"url":"https://git.kernel.org/stable/c/2935062be77113c1c4565ca9d0c72180449aafee"}],"tags":["cve.org"],"epss":0.00146,"epssPercentile":0.03862,"ingestedAt":"2026-11-05T20:33:06.395Z","slug":"CVE-2026-99269","body":"## Overview\n\nIn the Linux kernel, the following vulnerability has been resolved:\n\nsched_ext: Wait for SCX_OPSS_DISPATCHING before moving tasks off DSQs\n\nA task can be found on a non-local DSQ while the CPU which dispatched it\nis still running ops.dequeue() and hasn't cleared SCX_OPSS_DISPATCHING.\nThe DSQ consume and move paths don't wait for the dispatch to finish and\ncan operate on the task concurrently with the dispatcher.\n\nCall scx_wait_dispatching() in scx_move_local_task_to_local_dsq(),\nunlink_dsq_and_switch_rq_lock() and move_task_between_dsqs() before they\noperate on the task. In scx_move_local_task_to_local_dsq(), wait before\nscx_resolve_local_dsq() as it may update p->scx.flags.\n\n## Affected\n\n- `Linux >= ebf1ccff79c43f860cbd2f9d6cfab9a462d0cb2d < cc2839946328c1618b3870d521b32bb9483d49d0`\n- `Linux >= ebf1ccff79c43f860cbd2f9d6cfab9a462d0cb2d < 2935062be77113c1c4565ca9d0c72180449aafee`\n- `Linux 7.1`\n\n## Remediation\n\nRefer to the linked advisories for vendor-supplied fixes and affected version ranges.","depth":"twilight","depthScore":43,"depthScoreParts":{"impact":42.9,"likelihood":0,"exploitation":0,"ransomware":0},"changes":[]}