In the Linux kernel, the following vulnerability has been resolved: Input: uinput - zero-initialize uinputffuploadcompat to avoid info leak Struct ffeffectcompat is embedded twice inside uinputffuploadcompat, contains internal padding. In particular, there is a hole after struct ffreplay to satisfy alignment requirements for the following union member. Without clearing the structure, copytouser() may leak stack data to userspace. Initialize ffup_compat to zero before filling valid fields.