In the Linux kernel, the following vulnerability has been resolved: wifi: avoid kernel-infoleak from struct iwpoint struct iwpoint has a 32bit hole on 64bit arches. struct iwpoint { void _user pointer; / Pointer to the data (in user space) / __u16 length; / number of fields or size in bytes / __u16 flags; / Optional params */ }; Make sure to zero the structure to avoid disclosing 32bits of kernel data to user space.