CVE-2021-3329 CRITICAL

CVE-2021-3329: DOS: Incorrect handling of the initial HCI ACL_MTU handshake packet leads to crash of bluetooth host layer

Vendor Zephyrproject-Rtos
Product zephyr
Weakness CWE-703
Published February 26, 2023
Last update March 11, 2025
View on NVD All CVEs

CVSS base score

9.6/10
Attack vector Adjacent
Attack complexity Low
Privileges required None
User interaction None
Confidentiality Low
Integrity High

CVSS vector

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

What the vulnerability does

01Description

Lack of proper validation in HCI Host stack initialization can cause a crash of the bluetooth stack

Key dates

02Disclosure timeline

February 26, 2023 CVE published
March 11, 2025 Record updated