HOMEVULNERABILITIESCVE-2021-41229
MEDIUM

CVE-2021-41229

CWE-400Published: November 12, 2021· Updated: Jun 17, 2026

6.5
CVSS v3.1

Official 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.

NVD Source

Technical Analysis

CVE-2021-41229 requires adjacent network access, limiting remote exploitation but still posing risk in shared or local network environments.

The vulnerability requires no privileges and no user interaction, making it a prime target for automated exploitation campaigns and worm-like propagation.

A successful exploit results in availability disruption (denial of service), with a CVSS base score of 6.5.

CVSS v3.1 Vector Breakdown

Exploitability
Attack VectorAdjacent
Attack ComplexityLow
Privileges Req.None
User InteractionNone
ScopeUnchanged
Impact
ConfidentialityNone
IntegrityNone
AvailabilityHigh
CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Affected Vendors & Products

bluez1 product(s)
bluez
Debian1 product(s)
debian linux
Source: NVD CPE · 3 total CPE entries

Exploit & PoC Resources

NO KNOWN EXPLOITNo public exploit confirmed at this time
Exploit-DB
Offensive Security exploit database
GitHub PoC Search
Community PoC repositories
Rapid7 / Metasploit
Metasploit module search
PacketStorm
Security advisories & exploits
NVD Detail
Official NIST entry
MITRE CVE
CVE Program entry
External links open in a new tab. Always verify in a controlled environment before use.

Official Patches & Advisories

ADVISORYhttps://github.com/bluez/bluez/security/advisories/GHSA-3fqg-r8j5-f5xq
ADVISORYhttps://lists.debian.org/debian-lts-announce/2021/11/msg00022.html
ADVISORYhttps://lists.debian.org/debian-lts-announce/2022/10/msg00026.html
ADVISORYhttps://security.netapp.com/advisory/ntap-20211203-0004/
ADVISORYhttps://github.com/bluez/bluez/security/advisories/GHSA-3fqg-r8j5-f5xq
ADVISORYhttps://lists.debian.org/debian-lts-announce/2021/11/msg00022.html
ADVISORYhttps://lists.debian.org/debian-lts-announce/2022/10/msg00026.html
ADVISORYhttps://security.netapp.com/advisory/ntap-20211203-0004/

All References (9)

→
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

Quick Facts

CVE IDCVE-2021-41229
CVSS Score6.5 / 10
SeverityMEDIUM
WeaknessCWE-400
CISA KEVNo
Affected2 vendor(s)
PublishedNov 12, 2021

Related CVEs (CWE-400)

CVE-2024-39462
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CVE-2023-30769
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CVE-2024-36543
9.8
CVE-2022-48716
9.8
CVE-2023-28507
9.8
CVE-2018-19282
9.8

Recommended Actions

  • →Apply vendor patches immediately
  • →Monitor CVE-2021-41229 in threat intel feeds
  • →Review IDS/IPS signatures for exploitation attempts
Data sourced from NVD (NIST), CISA KEV, and EPSS (FIRST). Analysis generated by CTIWATCH.COM. CVE data is provided under the NVD usage policy.
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