Broadcom firmware before summer 2014 on Nexus 5 BCM4335C0 2012-12-11, Raspberry Pi 3 BCM43438A1 2014-06-02, and unspecifed other devices does not properly restrict LMP commnds and executes certain memory contents upon receiving an LMP command, as demonstrated by executing an HCI command.
https://www.broadcom.com/support/resources/product-security-center
https://support.apple.com/kb/HT210348
https://source.android.com/security/bulletin/2019-05-01
https://seclists.org/bugtraq/2019/Aug/21