QEMU Floppy Disk Controller fdctrl_handle_drive_specification_command Virtual Machine Escape Exploit (VENOM)

The fdctrl_handle_drive_specification_command() function in the code that emulates the Floppy Disk Controller in QEMU does not properly reset the index within a buffer when processing user-controlled data, leading to a heap-based buffer overflow in the QEMU process that runs on the Host system. An attacker running code within a Guest operating system can exploit this vulnerability in order to escape from the QEMU virtual machine and execute arbitrary code on the Host operating system. This vulnerability is also known as VENOM.