Linux Kernel Refcount Leak Vulnerability in UART Driver

A refcount leak vulnerability has been identified in the Linux kernel's UART driver, specifically within the 'ucc_uart.c' file. The issue arises in the 'soc_info()' function, where 'of_find_node_by_type()' returns a node pointer with an incremented refcount. The vulnerability occurs because the refcount is not properly decremented when the node is no longer needed, leading to a memory management issue.

Impact

Exploitation of this vulnerability causes a refcount leak, which can lead to memory management problems such as use-after-free conditions or memory exhaustion.