Few days ago Ubuntu announced that there is a serious security issue in the kernel from version 6.06, 8.04, 8.10, 9.04 and 9.10 . 7.xx versions are not affected. Canonical has been recommended as a solution to update the kernel of its various versions.Today i show you how to upgrade the kernel the safe way in Ubuntu and LinuxMint. I tested this tutorial on Ubuntu 9.10 karmic koala and LinuxMint 8 helena .