VULNERABILITY INTELLIGENCE

CVE-2021-34148

CVSS score6.5 MEDIUM

EPSS probability0.58%

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 in the Cypress WICED BT stack through 2.9.0 for CYW20735B1 devices does not properly handle the reception of LMP_max_slot with a greater ACL Length after completion of the LMP setup procedure, allowing attackers in radio range to trigger a denial of service (firmware crash) via a crafted LMP packet.

Weakness classification

nvd@nist.gov: NVD-CWE-noinfo

Primary references

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