Linux Kernel Refcount Leak Vulnerability in max77620 MFD Driver

A refcount leak vulnerability has been identified in the Linux kernel's max77620 multi-function device (MFD) driver. The issue arises in the function max77620_initialise_fpsof_get_child_by_name(), which returns a node pointer with an incremented reference count. The vulnerability occurs because the reference count is not properly decremented when the pointer is no longer needed, leading to a memory management issue.

Impact

Exploitation of this vulnerability causes a memory refcount leak, which can potentially lead to memory management issues or resource exhaustion.