Linux Kernel Apple AIC IRQ Chip Refcount Leak Vulnerability

A refcount leak vulnerability has been fixed in the Linux kernel's Apple AIC IRQ chip handling. The issue arose because the function 'build_fiq_affinityof_find_node_by_phandle()' returned a node pointer with an incremented reference count, which was not properly decremented when the node was no longer needed. This oversight led to a memory management issue, allowing for a potential refcount leak.

Impact

Exploitation of this vulnerability could lead to a refcount leak, causing memory management issues that could be exploited for arbitrary code execution or to cause a denial-of-service condition.