Medium severity5.7NVD Advisory· Published Sep 7, 2021· Updated Jun 17, 2026
CVE-2021-31611
CVE-2021-31611
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.
Affected products
3- Zhuhai Jieli/AC690X and AC692X devicesdescription
Patches
Vulnerability mechanics
References
4- www.zh-jieli.com/product/68-cn.htmlnvdVendor Advisory
- launchstudio.bluetooth.com/ListingDetails/19746nvdThird Party Advisory
- launchstudio.bluetooth.com/ListingDetails/58628nvdThird Party Advisory
- dl.packetstormsecurity.net/papers/general/braktooth.pdfnvdBroken Link
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