How severe is CVE-2021-41229?

CVE-2021-41229 has a CVSS 3.x base score of 4.3, rated medium severity. It is exploitable over an adjacent network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is none, integrity none, and availability low.

Is CVE-2021-41229 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (62nd percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2021-41229?

CVE-2021-41229 primarily affects Bluez. In total, 3 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.

How do I fix CVE-2021-41229?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.

When was CVE-2021-41229 published?

CVE-2021-41229 was published on 2021-11-12 and last updated on 2026-06-17.

CVE-2021-41229

CVE-2021-41229 is a medium-severity vulnerability in Bluez with a CVSS 3.x base score of 4.3. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-401.

Key facts

Severity: Medium (CVSS 3.x base score 4.3)
CVSS v2: 3.3
EPSS exploit prediction: 1% (62nd percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-401
Affected product: Bluez
Published: 2021-11-12
Last modified: 2026-06-17

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.

Frequently asked questions

What is CVE-2021-41229?: 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.
How severe is CVE-2021-41229?: CVE-2021-41229 has a CVSS 3.x base score of 4.3, rated medium severity. It is exploitable over an adjacent network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is none, integrity none, and availability low.
Is CVE-2021-41229 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (62nd percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2021-41229?: CVE-2021-41229 primarily affects Bluez. In total, 3 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
How do I fix CVE-2021-41229?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
When was CVE-2021-41229 published?: CVE-2021-41229 was published on 2021-11-12 and last updated on 2026-06-17.

References

Affected products (3)

cpe:2.3:a:bluez:bluez:5.58:*:*:*:*:*:*:*
cpe:2.3:o:debian:debian_linux:9.0:*:*:*:*:*:*:*
cpe:2.3:o:debian:debian_linux:10.0:*:*:*:*:*:*:*

More vulnerabilities in Bluez

CVE-2021-43400 — Critical (CVSS 9.1): An issue was discovered in gatt-database.c in BlueZ 5.61. A use-after-free can occur when a client disconnects during…
CVE-2024-8805 — High (CVSS 8.8): BlueZ HID over GATT Profile Improper Access Control Remote Code Execution Vulnerability. This vulnerability allows…
CVE-2022-39177 — High (CVSS 8.8): BlueZ before 5.59 allows physically proximate attackers to cause a denial of service because malformed and invalid…
CVE-2022-39176 — High (CVSS 8.8): BlueZ before 5.59 allows physically proximate attackers to obtain sensitive information because profiles/audio/avrcp.c…
CVE-2022-0204 — High (CVSS 8.8): A heap overflow vulnerability was found in bluez in versions prior to 5.63. An attacker with local network access could…
CVE-2019-8922 — High (CVSS 8.8): A heap-based buffer overflow was discovered in bluetoothd in BlueZ through 5.48. There isn't any check on whether there…

All CVEs affecting Bluez →

Other CWE-401 (Missing Release of Memory after Effective Lifetime) vulnerabilities

CVE-2026-46289 — Critical (CVSS 9.8): In the Linux kernel, the following vulnerability has been resolved: lib/scatterlist: fix length calculations in…
CVE-2022-0742 — Critical (CVSS 9.1): Memory leak in icmp6 implementation in Linux Kernel 5.13+ allows a remote attacker to DoS a host by making it go…
CVE-2024-25450 — High (CVSS 8.8): imlib2 v1.9.1 was discovered to mishandle memory allocation in the function init_imlib_fonts().
CVE-2023-33718 — High (CVSS 8.8): mp4v2 v2.1.3 was discovered to contain a memory leak via MP4File::ReadString() at mp4file_io.cpp
CVE-2021-40633 — High (CVSS 8.8): A memory leak (out-of-memory) in gif2rgb in util/gif2rgb.c in giflib 5.1.4 allows remote attackers trigger an out of…
CVE-2021-3492 — High (CVSS 8.8): Shiftfs, an out-of-tree stacking file system included in Ubuntu Linux kernels, did not properly handle faults occurring…

Browse all CWE-401 (Missing Release of Memory after Effective Lifetime) vulnerabilities →