CVE-2026-46021

In the Linux kernel, the following vulnerability has been resolved:

thermal: core: Fix thermal zone governor cleanup issues

If thermal_zone_device_register_with_trips() fails after adding

a thermal governor to the thermal zone being registered, the

governor is not removed from it as appropriate which may lead to

a memory leak.

In turn, thermal_zone_device_unregister() calls thermal_set_governor()

without acquiring the thermal zone lock beforehand which may race with

a governor update via sysfs and may lead to a use-after-free in that

case.

Address these issues by adding two thermal_set_governor() calls, one to

thermal_release() to remove the governor from the given thermal zone,

and one to the thermal zone registration error path to cover failures

preceding the thermal zone device registration.