cve/2021/CVE-2021-31611.md

### [CVE-2021-31611](https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2021-31611)
![](https://img.shields.io/static/v1?label=Product&message=n%2Fa&color=blue)
![](https://img.shields.io/static/v1?label=Version&message=n%2Fa&color=blue)
![](https://img.shields.io/static/v1?label=Vulnerability&message=n%2Fa&color=brighgreen)

### Description

The Bluetooth Classic implementation on Zhuhai Jieli AC690X and AC692X devices does not properly handle an out-of-order LMP Setup procedure that is followed by a malformed LMP packet, allowing attackers in radio range to deadlock a device via a crafted LMP packet. The user needs to manually reboot the device to restore communication.

### POC

#### Reference
- https://dl.packetstormsecurity.net/papers/general/braktooth.pdf

#### Github
- https://github.com/JeffroMF/awesome-bluetooth-security321
- https://github.com/engn33r/awesome-bluetooth-security