CVE-2026-43122
Description
AI Translation Available
In the Linux kernel, the following vulnerability has been resolved:
ACPI: processor: Update cpuidle driver check in __acpi_processor_start()
Commit 7a8c994cbb2d ('ACPI: processor: idle: Optimize ACPI idle
driver registration') moved the ACPI idle driver registration to
acpi_processor_driver_init() and acpi_processor_power_init() does
not register an idle driver any more.
Accordingly, the cpuidle driver check in __acpi_processor_start() needs
to be updated to avoid calling acpi_processor_power_init() without a
cpuidle driver, in which case the registration of the cpuidle device
in that function would lead to a NULL pointer dereference in
__cpuidle_register_device().
https://git.kernel.org/stable/c/0089ce1c056aee547115bdc25c223f8f88c08498
https://git.kernel.org/stable/c/68f38f648e4b5bed2aeadd2f711e25302e6490f8
https://git.kernel.org/stable/c/6cfed39c2ce64ac024bbde458a9727105e0b8c66