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

CVE-2022-49715

What is CVE-2022-49715?

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.

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References