VULNERABILITY INTELLIGENCE

CVE-2021-31785

CVSS score6.5 MEDIUM

EPSS probability0.44%

CISA KEVNot currently listed

Published2021-09-07

Last modified2026-06-17

CVSS vectorCVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

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.

Weakness classification

nvd@nist.gov: CWE-667

Primary references

cve@mitre.org — Technical Description, Third Party Advisory
cve@mitre.org — Third Party Advisory
cve@mitre.org — Broken Link, Vendor Advisory
af854a3a-2127-422b-91ae-364da2661108 — Technical Description, Third Party Advisory
af854a3a-2127-422b-91ae-364da2661108 — Third Party Advisory
af854a3a-2127-422b-91ae-364da2661108 — Broken Link, Vendor Advisory