This whitepaper discusses BRAKTOOTH, a family of new security vulnerabilities in commercial BT stacks that range from denial of service (DoS) via firmware crashes and deadlocks in commodity hardware to arbitrary code execution (ACE) in certain IoTs.
You can download it from the following link: https://packetstormsecurity.com/files/download/164037/braktooth.pdf
Source: https://packetstormsecurity.com/files/164037/BRAKTOOTH-Causing-Havoc-On-Bluetooth-Link-Manager.html