Bluetooth Impersonation AttackS or BIAS is a security flaw that could allow attackers to impersonate a Bluetooth device. The flaw stems from how two previously paired devices handle the long term key, also known as link key, that’s used to mutually authenticate the devices and activate a secure connection between them. With most standard-compliant Bluetooth devices impacted by the flaw, the researchers said they tested the attack against as many as 30 devices, including smartphones, tablets, laptops, headphones and single-board computers such as Raspberry Pi.
Source: https://thehackernews.com/2020/05/hacking-bluetooth-vulnerability.html