CVE-2020-10690

Name of the Vulnerable Software and Affected Versions Linux kernel versions prior to 5.5

Description The issue is caused by a use-after-free due to a race condition between the release of ptp clock and cdev while resource deallocation. This occurs when a high-privileged process allocates a ptp device file and goes to sleep, and during this time, the underlying device is removed. As the process wakes up to terminate and clean all attached files, the system crashes due to the cdev structure being invalid, as it has already been freed.

Recommendations For Linux kernel versions prior to 5.5, update to version 5.5 or later to resolve the issue. As a temporary workaround, consider restricting access to ptp device files to minimize the risk of exploitation.