CVE-2026-43122

A flaw was found in the Linux kernel's Advanced Configuration and Power Interface (ACPI) cpuidle driver. Due to an update in the `__acpi_processor_start()` function, a NULL pointer dereference can occur if `acpi_processor_power_init()` is called without a cpuidle driver. This vulnerability could allow a local attacker to trigger a system crash, leading to a denial of service (DoS).