CVE-2026-99269
sched_ext: Wait for SCX_OPSS_DISPATCHING before moving tasks off DSQs
In the Linux kernel, the following vulnerability has been resolved: sched_ext: Wait for SCX_OPSS_DISPATCHING before moving tasks off DSQs A task can be found on a non-local DSQ while the CPU which dispatched it is still running ops.dequeue() and hasn't cleared SCX_OPSS_DISPATCHING. The DSQ consume and move paths don't wait for the dispatch to finish and can operate on the task concurrently with the dispatcher. Call scx_wait_dispatching() in scx_move_local_task_to_local_dsq(), unlink_dsq_and_switch_rq_lock() and move_task_between_dsqs() before they operate on the task. In scx_move_local_task_to_local_dsq(), wait before scx_resolve_local_dsq() as it may update p->scx.flags.
Fixes and workarounds
No remediation reported in collected sources.
Missing remediation information is not evidence that no patch exists.
Affected products and versions
| Product | Versions | Authority |
|---|---|---|
| Linux Linux |
≥ ebf1ccff79c43f860cbd2f9d6cfab9a462d0cb2d; < cc2839946328c1618b3870d521b32bb9483d49d0 (affected, git) ≥ ebf1ccff79c43f860cbd2f9d6cfab9a462d0cb2d; < 2935062be77113c1c4565ca9d0c72180449aafee (affected, git) Other versions: unaffected |
CNA: Linux |
| Linux Linux |
7.1 (affected) ≥ 0; < 7.1 (unaffected, semver) ≥ 7.2.14; ≤ 7.2.* (unaffected, semver) ≥ 7.3; ≤ * (unaffected, original_commit_for_fix) Other versions: affected |
CNA: Linux |
Version ranges are source assertions. Check the vendor advisory and your installed configuration before determining exposure.
CVSS assessments
No CVSS assessment reported. An unscored record is not a low-severity determination.
Exploit evidence
No exploit evidence in collected sources. This is not proof of no exploitation.
References
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