CVE-2026-99269
Description
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.
How to fix
- Linux Linuxcc2839946328c1618b3870d521b32bb9483d49d0, 2935062be77113c1c4565ca9d0c72180449aafee or later
Affected products
| Product | Affected versions | Fixed in |
|---|---|---|
| Linux Linux | ebf1ccff79c43f860cbd2f9d6cfab9a462d0cb2d ≤ v < cc2839946328c1618b3870d521b32bb9483d49d0, ebf1ccff79c43f860cbd2f9d6cfab9a462d0cb2d ≤ v < 2935062be77113c1c4565ca9d0c72180449aafee, 7.1 | cc2839946328c1618b3870d521b32bb9483d49d0, 2935062be77113c1c4565ca9d0c72180449aafee |
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