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.

Red Hat Enterprise Linux 10 Not affected kernel Red Hat Enterprise Linux 6 Not affected kernel Red Hat Enterprise Linux 7 Not affected kernel Red Hat Enterprise Linux 7 Not affected kernel-rt Red Hat Enterprise Linux 8 Not affected kernel Red Hat Enterprise Linux 8 Not affected kernel-rt Red Hat Enterprise Linux 9 Not affected kernel Red Hat Enterprise Linux 9 Not affected kernel-rt https://www.cve.org/CVERecord?id=CVE-2026-43482 https://nvd.nist.gov/vuln/detail/CVE-2026-43482 https://lore.kernel.org/linux-cve-announce/2026051348-CVE-2026-43482-8a3e@gregkh/T