An issue was discovered in the NDIS Usermode IO driver (RtkIOAC60.sys, version 6.0.5600.16348) allowing local authenticated attackers to send a crafted IOCTL request to the driver to cause a denial of service.

Realtek NDIS driver rt640x64.sys, file version 10.1.505.2015, fails to do any size checking on an input buffer from user space, which the driver assumes has a size greater than zero bytes. To exploit this vulnerability, an attacker must send an IRP with a system buffer size of 0.