The Linux/Unix host has one or more packages installed that are impacted by a vulnerability without a vendor supplied patch available.

  - sched_ext: Fix stale direct dispatch state in ddsp_dsq_id @p->scx.ddsp_dsq_id can be left set (non-     SCX_DSQ_INVALID) triggering a spurious warning in mark_direct_dispatch() when the next wakeup's     ops.select_cpu() calls scx_bpf_dsq_insert(), such as: WARNING: kernel/sched/ext.c:1273 at     scx_dsq_insert_commit+0xcd/0x140 The root cause is that ddsp_dsq_id was only cleared in     dispatch_enqueue(), which is not reached in all paths that consume or cancel a direct dispatch verdict.
    Fix it by clearing it at the right places: - direct_dispatch(): cache the direct dispatch state in local     variables and clear it before dispatch_enqueue() on the synchronous path. For the deferred path, the     direct dispatch state must remain set until process_ddsp_deferred_locals() consumes them. -     process_ddsp_deferred_locals(): cache the dispatch state in local variables and clear it before calling     dispatch_to_local_dsq(), which may migrate the task to another rq. - do_enqueue_task(): clear the dispatch     state on the enqueue path (local/global/bypass fallbacks), where the direct dispatch verdict is ignored. -     dequeue_task_scx(): clear the dispatch state after dispatch_dequeue() to handle both the deferred dispatch     cancellation and the holding_cpu race, covering all cases where a pending direct dispatch is cancelled. -     scx_disable_task(): clear the direct dispatch state when transitioning a task out of the current     scheduler. Waking tasks may have had the direct dispatch state set by the outgoing scheduler's     ops.select_cpu() and then been queued on a wake_list via ttwu_queue_wakelist(), when     SCX_OPS_ALLOW_QUEUED_WAKEUP is set. Such tasks are not on the runqueue and are not iterated by     scx_bypass(), so their direct dispatch state won't be cleared. Without this clear, any subsequent SCX     scheduler that tries to direct dispatch the task will trigger the WARN_ON_ONCE() in     mark_direct_dispatch(). (CVE-2026-31733)

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Linux Distros Unpatched Vulnerability : CVE-2026-31733

medium Nessus Plugin ID 312208

Version 1.4