CVE-2021-34148 Affecting bluez-firmware package, versions *


Severity

Recommended
0.0
medium
0
10

Based on Ubuntu security rating.

Threat Intelligence

EPSS
0.1% (30th percentile)

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  • Snyk IDSNYK-UBUNTU2204-BLUEZFIRMWARE-3136453
  • published7 Apr 2025
  • disclosed7 Sept 2021

Introduced: 7 Sep 2021

CVE-2021-34148  (opens in a new tab)

How to fix?

There is no fixed version for Ubuntu:22.04 bluez-firmware.

NVD Description

Note: Versions mentioned in the description apply only to the upstream bluez-firmware package and not the bluez-firmware package as distributed by Ubuntu. See How to fix? for Ubuntu:22.04 relevant fixed versions and status.

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 Base Scores

version 3.1