CVE-2021-41229 MEDIUM

CVE-2021-41229: Memory leak in BlueZ

Vendor Bluez
Product bluez
Weakness CWE-400
Published November 12, 2021
Last update November 4, 2025

CVSS base score

4.3/10
Attack vector Adjacent
Attack complexity Low
Privileges required None
User interaction None
Confidentiality None
Integrity None

CVSS vector

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

What the vulnerability does

01Description

BlueZ is a Bluetooth protocol stack for Linux. In affected versions a vulnerability exists in sdp_cstate_alloc_buf which allocates memory which will always be hung in the singly linked list of cstates and will not be freed. This will cause a memory leak over time. The data can be a very large object, which can be caused by an attacker continuously sending sdp packets and this may cause the service of the target device to crash.

Key dates

02Disclosure timeline

November 12, 2021 CVE published
November 4, 2025 Record updated