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.
Advisories

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Fixes

Solution

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Workaround

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History

Tue, 03 Nov 2026 14:00:00 +0000

Type Values Removed Values Added
First Time appeared Linux linux
Vendors & Products Linux linux

Tue, 03 Nov 2026 12:00:00 +0000

Type Values Removed Values Added
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.
Title sched_ext: Wait for SCX_OPSS_DISPATCHING before moving tasks off DSQs
First Time appeared Linux
Linux linux Kernel
CPEs cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*
Vendors & Products Linux
Linux linux Kernel
References

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cve-icon MITRE

Status: PUBLISHED

Assigner: Linux

Published:

Updated: 2026-11-03T11:48:18.333Z

Reserved: 2026-09-25T10:25:14.404Z

Link: CVE-2026-99269

cve-icon Vulnrichment

No data.

cve-icon NVD

Status : Received

Published: 2026-11-03T12:17:34.117

Modified: 2026-11-03T12:17:34.117

Link: CVE-2026-99269

cve-icon Redhat

No data.

cve-icon OpenCVE Enrichment

Updated: 2026-11-03T13:45:13Z

Weaknesses

No weakness.