CVE-2021-31785

MEDIUM

Actions ATS2815 and ATS2819 Firmware - Denial of Service via LMP Packet Deadlock

Title source: llm
STIX 2.1

Description

The Bluetooth Classic implementation on Actions ATS2815 and ATS2819 chipsets does not properly handle the reception of multiple LMP_host_connection_req packets, allowing attackers in radio range to trigger a denial of service (deadlock) of the device via crafted LMP packets. Manual user intervention is required to restart the device and restore Bluetooth communication.

References (3)

Core 3
Core References
Broken Link, Vendor Advisory x_refsource_misc
https://www.actions-semi.com/index.php?id=3581&siteId=4
Third Party Advisory x_refsource_misc
https://launchstudio.bluetooth.com/ListingDetails/76427
Technical Description, Third Party Advisory x_refsource_misc
https://dl.packetstormsecurity.net/papers/general/braktooth.pdf

Scores

CVSS v3 6.5
EPSS 0.0043
EPSS Percentile 34.1%
Attack Vector ADJACENT_NETWORK
CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Details

CWE
CWE-667
Status published
Products (5)
actions-semi/ats2815_firmware
actions-semi/ats2819_firmware
actions-semi/ats2819p_firmware
actions-semi/ats2819s_firmware
actions-semi/ats2819t_firmware
Published Sep 07, 2021
Tracked Since Feb 18, 2026