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.
https://github.com/bluez/bluez/security/advisories/GHSA-3fqg-r8j5-f5xq
https://lists.debian.org/debian-lts-announce/2021/11/msg00022.html
Source: MITRE
Published: 2021-11-12
Updated: 2022-04-25
Type: CWE-401
Base Score: 3.3
Vector: AV:A/AC:L/Au:N/C:N/I:N/A:P
Impact Score: 2.9
Exploitability Score: 6.5
Severity: LOW
Base Score: 6.5
Vector: CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Impact Score: 3.6
Exploitability Score: 2.8
Severity: MEDIUM