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CVE-2021-41229

Memory leak in BlueZ

Published: Nov 12, 2021Updated: Nov 4, 2025 Sources: CVE List NVD BDUCWE-400
NVD MITRE
4.3CVSSMEDIUM
EPSS Score
1.1%
Top 38.6%
CISA KEV
Not in KEV
Exploits
No Known Exploits
Remediation
Patch Available

Description

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.

CVSS Vector Breakdown

AV:AAC:LPR:NUI:NS:UC:NI:NA:L
Exploitability
AV:AAttack Vector
Adjacent
AC:LAttack Complexity
Low
PR:NPrivileges Required
None
UI:NUser Interaction
None
Scope
S:UScope
Unchanged
Impact
C:NConfidentiality
None
I:NIntegrity
None
A:LAvailability
Low
Open in CVSS calculator →

Weaknesses

CWE-400CWE-401

Affected Products

bluezbluez
Mixed
Operating Systems / linux-distro
debian linuxdebian
On-premOS
Operating Systems / linux-distro
UbuntuCanonical Ltd.
On-premOS
Operating Systems / linux-distro
Astra Linux Special EditionООО «РусБИТех-Астра»
On-premOS
Operating Systems / linux-distro
SUSE Linux Enterprise Server for SAP ApplicationsNovell Inc.
On-premOS
Operating Systems / linux-distro
bluezoss-projectGBOperating Systemsaka bluez-libs, bluez-utils
debianoss-projectGBOperating Systemsaka debian gnu/linux
canonical ltd.commercialGBOperating Systemsaka canonical
ооо «русбитех-астра»commercialRUOperating Systemsaka rusbitech-astra
novell inc.commercialUSOperating Systems
and 9 more affected products View all →

Attack Graph

Products CVE Techniques Tactics

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Exploitability

Official Patch Available

MITRE ATT&CK

1 technique
Impact
View detailed technique mapping

References

https://github.com/bluez/bluez/security/advisories/GHSA-3fqg-r8j5-f5xq
github.com
https://lists.debian.org/debian-lts-announce/2021/11/msg00022.html
lists.debian.org
https://lists.debian.org/debian-lts-announce/2022/10/msg00026.html
lists.debian.org
and 17 more references View all →

Timeline

Published
Nov 12, 2021
Last Updated
Nov 4, 2025

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