CVE-2024-36932

In the Linux kernel, the following vulnerability has been resolved:<br /> <br /> thermal/debugfs: Prevent use-after-free from occurring after cdev removal<br /> <br /> Since thermal_debug_cdev_remove() does not run under cdev-&gt;lock, it can<br /> run in parallel with thermal_debug_cdev_state_update() and it may free<br /> the struct thermal_debugfs object used by the latter after it has been<br /> checked against NULL.<br /> <br /> If that happens, thermal_debug_cdev_state_update() will access memory<br /> that has been freed already causing the kernel to crash.<br /> <br /> Address this by using cdev-&gt;lock in thermal_debug_cdev_remove() around<br /> the cdev-&gt;debugfs value check (in case the same cdev is removed at the<br /> same time in two different threads) and its reset to NULL.<br /> <br /> Cc :6.8+ # 6.8+