Name: CVE-2021-34148: Undefined Security Weakness
Creator: Rapid7
Published: 2021-09-07T00:00:00.000Z
License: https://www.rapid7.com/legal/website-terms-of-use/
Keywords: CVE, CVE-2021-34148, CVSS 6.5, EPSS 0.00101

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.

CVSS Details

CVSS 3.1 Base Score: 6.5
CVSS 3.1 Vector: (CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H)

Covered by Rapid7

Product	Vendor Advisory	Solution File	Added	Published
Debian	—	Upgrade bluez-firmware	Jul 30, 2024	Sep 7, 2021
Ubuntu	—	No solution exists	Jun 26, 2025	Sep 7, 2021

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CVSS Details

Covered by Rapid7

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