Vulnerability in Linux

[ Description ]Official 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.

[ Fixes ]Fixes and patches

No fix or interim patch is linked from our sources yet. Check the vendor references below and limit exposure of affected systems until a fix is available.

[ Advisories ]Government CERT advisories

• BSI CERT-Bund2 Nov 2026WID-SEC-2026-4302

  Linux Kernel: Multiple vulnerabilities allow an unspecified attack Translated from German

  Risk mediumCVE-2026-99237CVE-2026-99264CVE-2026-99220+50 more CVEs

[ References ]References

• git.kernel.org/stable/c/2935062be77113c1c4565ca9d0c72180449aafee
• git.kernel.org/stable/c/cc2839946328c1618b3870d521b32bb9483d49d0