CVE-2021-41229

Name: CVE-2021-41229
Creator: NVD / NIST
Published: 2021-11-12T23:15:08.857+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

MEDIUMCVSS 6.5/10EPSS 1.10%

Last modified Jun 17, 2026

CVE-2021-41229 is a medium-severity vulnerability rated 6.5/10 on the CVSS scale. 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. EPSS estimates a 1.10% chance of exploitation in the next 30 days.

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.

Metrics

CVSS 3.1

6.5/10

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

EPSS Probability

1.10%

61.5th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

Affected Software

Vendor	Product	Versions
Bluez	Bluez	5.58
Debian	Debian Linux	9.0
Debian	Debian Linux	10.0

References

https://github.com/bluez/bluez/security/advisories/GHSA-3fqg-r8j5-f5xqExploit, Third Party Advisory
https://lists.debian.org/debian-lts-announce/2021/11/msg00022.htmlMailing List, Third Party Advisory
https://lists.debian.org/debian-lts-announce/2022/10/msg00026.htmlMailing List, Third Party Advisory
https://security.netapp.com/advisory/ntap-20211203-0004/Third Party Advisory
https://github.com/bluez/bluez/security/advisories/GHSA-3fqg-r8j5-f5xqExploit, Third Party Advisory
https://lists.debian.org/debian-lts-announce/2021/11/msg00022.htmlMailing List, Third Party Advisory
https://lists.debian.org/debian-lts-announce/2022/10/msg00026.htmlMailing List, Third Party Advisory
https://lists.debian.org/debian-lts-announce/2024/09/msg00022.html
https://security.netapp.com/advisory/ntap-20211203-0004/Third Party Advisory

Timeline

Published: Nov 12, 2021
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2021-41229?

How severe is CVE-2021-41229?

CVE-2021-41229 has a CVSS score of 6.5/10 (MEDIUM severity). The EPSS model estimates a 1.10% probability of exploitation in the next 30 days.

How do I fix CVE-2021-41229?

Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2021-41229?

Run a free Strix scan to check your systems for this vulnerability.

Scan your code now

Source: NVD / NIST