CVE-2021-31613: Zh-Jieli AC6901 Firmware

Medium severity, CVSS 6.5. EPSS: 0.6% chance of exploitation in the next 30 days.

The Bluetooth Classic implementation on Zhuhai Jieli AC690X and AC692X devices does not properly handle the reception of a truncated LMP packet during the LMP auto rate procedure, allowing attackers in radio range to immediately crash (and restart) a device via a crafted LMP packet.

Affected products

• Zh-Jieli AC6901 Firmware: affected versions not specified
• Zh-Jieli AC6921 Firmware: affected versions not specified
• Zh-Jieli AC6925 Firmware: affected versions not specified
• Zh-Jieli AC6926 Firmware: affected versions not specified
• Zh-Jieli AC6928 Firmware: affected versions not specified

Published 2021-09-07. Last modified 2026-06-17.