Refcount Leak in Linux Kernel's IRQ Chip Management by Arm Ltd.

CVE-2022-49715

Summary

A vulnerability affecting the Linux kernel's IRQ chip management was identified, specifically involving GICv3. The function of_find_node_by_phandle() succeeds in returning a node pointer with its reference count incremented; however, if not properly managed, this can lead to a reference count leak. A missing call to of_node_put() can result in memory management issues, potentially destabilizing the kernel environment. This issue has been resolved with an update, ensuring proper reference management within the IRQ chip infrastructure.

References