Medium · published May 27, 2026
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.
| Product | Versions | Fixed in |
|---|---|---|
| linux/linux_kernel | ≥ 4.2, < 6.6.140 | 6.6.140 |
| linux/linux_kernel | ≥ 6.7, < 6.12.86 | 6.12.86 |
| linux/linux_kernel | ≥ 6.13, < 6.18.27 | 6.18.27 |
| linux/linux_kernel | ≥ 6.19, < 7.0.4 | 7.0.4 |