From whatswithjeff.com: "Just recently, it was discovered that there was a major vulnerability in smartphones and tablets that are powered by a Samsung Exynos 4 SoC processor. Specifically, the Exynos 4210 and the newer Exynos 4412 mobile processors. This is a serious security flaw, even if your phone is not rooted. Why? because the flaw is in the kernel and it can give any app root access/permission without you even knowing it."