CVE-2026-31734
kernel: sched_ext: Fix is_bpf_migration_disabled() false negative on non-PREEMPT_RCU
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Severity
UnknownRed Hat Product Security
CVSS
Review impact separately from score.
Published · May 1, 2026
Updated · June 28, 2026
Description
A flaw was found in the Linux kernel's sched_ext component. An incorrect check for migration-disabled tasks on systems without CONFIG_PREEMPT_RCU enabled could lead to a task being dispatched to a remote CPU. This can trigger an scx_error in task_can_run_on_remote_rq(), resulting in a Denial of Service.
Mitigation
No mitigation is specified in collected source.
CVSS / CWE
CWE-372 · Incomplete Internal State Distinction