Red Hat, Ubuntu, and Arch Linux patch Linux kernel exploit

[Updated: Jan. 25] -- Red Hat, Canonical, and Arch Linux have released patches for a vulnerability in Linux kernels 2.6.39 and above that enables attackers to gain root access on a system. Proof-of-concept exploit code was posted last week after & CVE-2012-0056& was exposed -- thanks to Linus Torvalds announcing a kernel patch before Linux distro projects had had time to apply it....