kernel: vmwgfx: use-after-free in vmw_cmd_res_check

A use-after-free vulnerability was found in the Linux kernel's vmwgfx driver in vmwcmdrescheck. This flaw allows a local, unprivileged attacker with access to either /dev/dri/card0 or /dev/dri/rendererD128, who can issue an ioctl on the resulting file descriptor, to crash the system, causing a...