Linux Kernel RCU Read Protection Vulnerability in procfs for BCM Operations

A vulnerability in the Linux kernel related to the handling of procfs content for BCM operations has been addressed. When procfs data is generated for a BCM operation that is in the process of being removed, the output may contain unreliable information due to a use-after-free condition. This issue arises because the removal process lacks proper read-side synchronization. The vulnerability has been resolved by adding the necessary RCU read lock, ensuring that list entries are correctly managed under RCU protection.

Impact

The vulnerability could lead to a use-after-free condition, allowing for the potential execution of arbitrary code or causing a denial-of-service by crashing the system.