tty: Fix out-of-bound vmalloc access in imageblit
This is an automated ID intended to aid in discovery of potential security vulnerabilities. The actual impact and attack plausibility have not yet been proven. This ID is fixed in Linux Kernel version v4.4.286 by commit 7e71fcedfda6f7de18f850a6b36e78d78b04476f. For more details please see the references link.