CVE-2021-31611

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.

• CWE-667

• http://www.zh-jieli.com/product/68-cn.htmlVendor Advisory
• https://dl.packetstormsecurity.net/papers/general/braktooth.pdfBroken Link
• https://launchstudio.bluetooth.com/ListingDetails/19746Third Party Advisory
• https://launchstudio.bluetooth.com/ListingDetails/58628Third Party Advisory
• http://www.zh-jieli.com/product/68-cn.htmlVendor Advisory
• https://dl.packetstormsecurity.net/papers/general/braktooth.pdfBroken Link
• https://launchstudio.bluetooth.com/ListingDetails/19746Third Party Advisory
• https://launchstudio.bluetooth.com/ListingDetails/58628Third Party Advisory

Published

Sep 7, 2021

Last Modified

Jun 17, 2026

Status

Modified

• How Strix found a critical auth bypass in etcdStrix autonomously discovered a critical authentication bypass in etcd, later designated CVE-2026-33413.
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