CVE-2026-43482

kernel: sched_ext: Disable preemption between scx_claim_exit() and kicking helper work

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Severity

Unknown

Red Hat Product Security

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CVSS

Review impact separately from score.

Published · May 13, 2026

Updated · June 28, 2026

Description

A flaw was found in the Linux kernel's sched_ext component. If a task is preempted between the scx_claim_exit() function and the subsequent helper work activation, and the BPF (Berkeley Packet Filter) scheduler fails to reschedule it, the system can become unresponsive. This can lead to a denial of service, as tasks stop being dispatched and the system wedges.

Mitigation

No mitigation is specified in collected source.

CVSS / CWE

CWE-368 · Context Switching Race Condition