# CVE-2021-41229: bluetooth: BlueZ is a Bluetooth protocol stack for Linux

CVE-2021-41229 is fixed in 14 products on 1 platform, first by bluetooth 5.53-0ubuntu3.4, released November 12, 2021. It is not reported as exploited. Patch Radar priority: Routine.

- Web page: https://patchblox.com/security/cve/CVE-2021-41229
- Priority: Routine
- CVSS: 6.5 (Low)
- EPSS: 0.0118
- CISA KEV: not listed
- Exploited (vendor report): no
- Publicly disclosed: no
- Published: Nov 12, 2021

## Description

BlueZ is a Bluetooth protocol stack for Linux. In affected versions avulnerability exists in sdp_cstate_alloc_buf which allocates memory whichwill always be hung in the singly linked list of cstates and will not befreed. This will cause a memory leak over time. The data can be a verylarge object, which can be caused by an attacker continuously sending sdppackets and this may cause the service of the target device to crash.

## Where it's fixed

| Platform | Product | Fixed in | Fix | Released |
|---|---|---|---|---|
| Linux | bluetooth Ubuntu 18.04.6 LTS (bionic) | 5.48-0ubuntu3.6 | [bluetooth 5.48-0ubuntu3.6](https://patchblox.com/security/data/fix/linux/ubuntu-bionic-bluetooth-5.48-0ubuntu3.6.md) | Nov 29, 2021 |
| Linux | bluetooth Ubuntu 20.04 LTS (focal) | 5.53-0ubuntu3.4 | [bluetooth 5.53-0ubuntu3.4](https://patchblox.com/security/data/fix/linux/ubuntu-focal-bluetooth-5.53-0ubuntu3.4.md) | Nov 12, 2021 |
| Linux | bluetooth Ubuntu 22.04.1 LTS (jammy) | 5.62-0ubuntu2 | [bluetooth 5.62-0ubuntu2](https://patchblox.com/security/data/fix/linux/ubuntu-jammy-bluetooth-5.62-0ubuntu2.md) | Nov 12, 2021 |
| Linux | bluetooth Ubuntu 24.10 (oracular) | 5.62-0ubuntu2 | [bluetooth 5.62-0ubuntu2](https://patchblox.com/security/data/fix/linux/ubuntu-oracular-bluetooth-5.62-0ubuntu2.md) | Jan 16, 2026 |
| Linux | bluetooth Ubuntu 25.04 (plucky) | 5.62-0ubuntu2 | [bluetooth 5.62-0ubuntu2](https://patchblox.com/security/data/fix/linux/ubuntu-plucky-bluetooth-5.62-0ubuntu2.md) | Jan 16, 2026 |
| Linux | bluez Debian 12.15 (bookworm) | 5.62-2 | [DEBIAN-CVE-2021-41229](https://patchblox.com/security/data/fix/linux/debian-cve-2021-41229.md) | Nov 12, 2021 |
| Linux | bluez Debian 13.5 (trixie) | 5.62-2 | [DEBIAN-CVE-2021-41229](https://patchblox.com/security/data/fix/linux/debian-cve-2021-41229.md) | Nov 12, 2021 |
| Linux | bluez Debian 14 | 5.62-2 | [DEBIAN-CVE-2021-41229](https://patchblox.com/security/data/fix/linux/debian-cve-2021-41229.md) | Nov 12, 2021 |
| Linux | bluez RHEL 8 | 0:5.56-3.el8 | [RHSA-2022:2081](https://patchblox.com/security/data/fix/linux/rhsa-2022-2081.md) | May 10, 2022 |
| Linux | bluez Ubuntu 18.04.6 LTS (bionic) | 5.48-0ubuntu3.6 | [bluez 5.48-0ubuntu3.6](https://patchblox.com/security/data/fix/linux/ubuntu-bionic-bluez-5.48-0ubuntu3.6.md) | Nov 29, 2021 |
| Linux | bluez Ubuntu 20.04 LTS (focal) | 5.53-0ubuntu3.4 | [bluez 5.53-0ubuntu3.4](https://patchblox.com/security/data/fix/linux/ubuntu-focal-bluez-5.53-0ubuntu3.4.md) | Nov 12, 2021 |
| Linux | bluez Ubuntu 22.04.1 LTS (jammy) | 5.62-0ubuntu2 | [bluez 5.62-0ubuntu2](https://patchblox.com/security/data/fix/linux/ubuntu-jammy-bluez-5.62-0ubuntu2.md) | Nov 12, 2021 |
| Linux | bluez Ubuntu 24.10 (oracular) | 5.62-0ubuntu2 | [bluez 5.62-0ubuntu2](https://patchblox.com/security/data/fix/linux/ubuntu-oracular-bluez-5.62-0ubuntu2.md) | Jan 16, 2026 |
| Linux | bluez Ubuntu 25.04 (plucky) | 5.62-0ubuntu2 | [bluez 5.62-0ubuntu2](https://patchblox.com/security/data/fix/linux/ubuntu-plucky-bluez-5.62-0ubuntu2.md) | Jan 16, 2026 |
| Linux | bluez almalinux 8 | 5.56-3.el8 | [ALSA-2022:2081](https://patchblox.com/security/data/fix/linux/alsa-2022-2081.md) | May 10, 2022 |
| Linux | bluez ol 8 | 0:5.56-3.el8 | [ELSA-2022-2081](https://patchblox.com/security/data/fix/linux/elsa-2022-2081.md) | May 17, 2022 |
| Linux | bluez rocky 8 | 0:5.56-3.el8 | [RLSA-2022:2081](https://patchblox.com/security/data/fix/linux/rlsa-2022-2081.md) | May 10, 2022 |
| Linux | bluez-cups RHEL 8 | 0:5.56-3.el8 | [RHSA-2022:2081](https://patchblox.com/security/data/fix/linux/rhsa-2022-2081.md) | May 10, 2022 |
| Linux | bluez-cups Ubuntu 18.04.6 LTS (bionic) | 5.48-0ubuntu3.6 | [bluez-cups 5.48-0ubuntu3.6](https://patchblox.com/security/data/fix/linux/ubuntu-bionic-bluez-cups-5.48-0ubuntu3.6.md) | Nov 29, 2021 |
| Linux | bluez-cups Ubuntu 20.04 LTS (focal) | 5.53-0ubuntu3.4 | [bluez-cups 5.53-0ubuntu3.4](https://patchblox.com/security/data/fix/linux/ubuntu-focal-bluez-cups-5.53-0ubuntu3.4.md) | Nov 12, 2021 |
| Linux | bluez-cups Ubuntu 22.04.1 LTS (jammy) | 5.62-0ubuntu2 | [bluez-cups 5.62-0ubuntu2](https://patchblox.com/security/data/fix/linux/ubuntu-jammy-bluez-cups-5.62-0ubuntu2.md) | Nov 12, 2021 |
| Linux | bluez-cups Ubuntu 24.10 (oracular) | 5.62-0ubuntu2 | [bluez-cups 5.62-0ubuntu2](https://patchblox.com/security/data/fix/linux/ubuntu-oracular-bluez-cups-5.62-0ubuntu2.md) | Jan 16, 2026 |
| Linux | bluez-cups Ubuntu 25.04 (plucky) | 5.62-0ubuntu2 | [bluez-cups 5.62-0ubuntu2](https://patchblox.com/security/data/fix/linux/ubuntu-plucky-bluez-cups-5.62-0ubuntu2.md) | Jan 16, 2026 |
| Linux | bluez-cups almalinux 8 | 5.56-3.el8 | [ALSA-2022:2081](https://patchblox.com/security/data/fix/linux/alsa-2022-2081.md) | May 10, 2022 |
| Linux | bluez-cups ol 8 | 0:5.56-3.el8 | [ELSA-2022-2081](https://patchblox.com/security/data/fix/linux/elsa-2022-2081.md) | May 17, 2022 |
| Linux | bluez-hcidump Ubuntu 18.04.6 LTS (bionic) | 5.48-0ubuntu3.6 | [bluez-hcidump 5.48-0ubuntu3.6](https://patchblox.com/security/data/fix/linux/ubuntu-bionic-bluez-hcidump-5.48-0ubuntu3.6.md) | Nov 29, 2021 |
| Linux | bluez-hcidump Ubuntu 20.04 LTS (focal) | 5.53-0ubuntu3.4 | [bluez-hcidump 5.53-0ubuntu3.4](https://patchblox.com/security/data/fix/linux/ubuntu-focal-bluez-hcidump-5.53-0ubuntu3.4.md) | Nov 12, 2021 |
| Linux | bluez-hcidump Ubuntu 22.04.1 LTS (jammy) | 5.62-0ubuntu2 | [bluez-hcidump 5.62-0ubuntu2](https://patchblox.com/security/data/fix/linux/ubuntu-jammy-bluez-hcidump-5.62-0ubuntu2.md) | Nov 12, 2021 |
| Linux | bluez-hcidump Ubuntu 24.10 (oracular) | 5.62-0ubuntu2 | [bluez-hcidump 5.62-0ubuntu2](https://patchblox.com/security/data/fix/linux/ubuntu-oracular-bluez-hcidump-5.62-0ubuntu2.md) | Jan 16, 2026 |
| Linux | bluez-hcidump Ubuntu 25.04 (plucky) | 5.62-0ubuntu2 | [bluez-hcidump 5.62-0ubuntu2](https://patchblox.com/security/data/fix/linux/ubuntu-plucky-bluez-hcidump-5.62-0ubuntu2.md) | Jan 16, 2026 |
| Linux | bluez-hid2hci RHEL 8 | 0:5.56-3.el8 | [RHSA-2022:2081](https://patchblox.com/security/data/fix/linux/rhsa-2022-2081.md) | May 10, 2022 |
| Linux | bluez-hid2hci almalinux 8 | 5.56-3.el8 | [ALSA-2022:2081](https://patchblox.com/security/data/fix/linux/alsa-2022-2081.md) | May 10, 2022 |
| Linux | bluez-hid2hci ol 8 | 0:5.56-3.el8 | [ELSA-2022-2081](https://patchblox.com/security/data/fix/linux/elsa-2022-2081.md) | May 17, 2022 |
| Linux | bluez-libs RHEL 8 | 0:5.56-3.el8 | [RHSA-2022:2081](https://patchblox.com/security/data/fix/linux/rhsa-2022-2081.md) | May 10, 2022 |
| Linux | bluez-libs almalinux 8 | 5.56-3.el8 | [ALSA-2022:2081](https://patchblox.com/security/data/fix/linux/alsa-2022-2081.md) | May 10, 2022 |
| Linux | bluez-libs ol 8 | 0:5.56-3.el8 | [ELSA-2022-2081](https://patchblox.com/security/data/fix/linux/elsa-2022-2081.md) | May 17, 2022 |
| Linux | bluez-libs-devel RHEL 8 | 0:5.56-3.el8 | [RHSA-2022:2081](https://patchblox.com/security/data/fix/linux/rhsa-2022-2081.md) | May 10, 2022 |
| Linux | bluez-libs-devel almalinux 8 | 5.56-3.el8 | [ALSA-2022:2081](https://patchblox.com/security/data/fix/linux/alsa-2022-2081.md) | May 10, 2022 |
| Linux | bluez-libs-devel ol 8 | 0:5.56-3.el8 | [ELSA-2022-2081](https://patchblox.com/security/data/fix/linux/elsa-2022-2081.md) | May 17, 2022 |
| Linux | bluez-meshd Ubuntu 22.04.1 LTS (jammy) | 5.62-0ubuntu2 | [bluez-meshd 5.62-0ubuntu2](https://patchblox.com/security/data/fix/linux/ubuntu-jammy-bluez-meshd-5.62-0ubuntu2.md) | Nov 12, 2021 |
| Linux | bluez-meshd Ubuntu 24.10 (oracular) | 5.62-0ubuntu2 | [bluez-meshd 5.62-0ubuntu2](https://patchblox.com/security/data/fix/linux/ubuntu-oracular-bluez-meshd-5.62-0ubuntu2.md) | Jan 16, 2026 |
| Linux | bluez-meshd Ubuntu 25.04 (plucky) | 5.62-0ubuntu2 | [bluez-meshd 5.62-0ubuntu2](https://patchblox.com/security/data/fix/linux/ubuntu-plucky-bluez-meshd-5.62-0ubuntu2.md) | Jan 16, 2026 |
| Linux | bluez-obexd RHEL 8 | 0:5.56-3.el8 | [RHSA-2022:2081](https://patchblox.com/security/data/fix/linux/rhsa-2022-2081.md) | May 10, 2022 |
| Linux | bluez-obexd Ubuntu 18.04.6 LTS (bionic) | 5.48-0ubuntu3.6 | [bluez-obexd 5.48-0ubuntu3.6](https://patchblox.com/security/data/fix/linux/ubuntu-bionic-bluez-obexd-5.48-0ubuntu3.6.md) | Nov 29, 2021 |
| Linux | bluez-obexd Ubuntu 20.04 LTS (focal) | 5.53-0ubuntu3.4 | [bluez-obexd 5.53-0ubuntu3.4](https://patchblox.com/security/data/fix/linux/ubuntu-focal-bluez-obexd-5.53-0ubuntu3.4.md) | Nov 12, 2021 |
| Linux | bluez-obexd Ubuntu 22.04.1 LTS (jammy) | 5.62-0ubuntu2 | [bluez-obexd 5.62-0ubuntu2](https://patchblox.com/security/data/fix/linux/ubuntu-jammy-bluez-obexd-5.62-0ubuntu2.md) | Nov 12, 2021 |
| Linux | bluez-obexd Ubuntu 24.10 (oracular) | 5.62-0ubuntu2 | [bluez-obexd 5.62-0ubuntu2](https://patchblox.com/security/data/fix/linux/ubuntu-oracular-bluez-obexd-5.62-0ubuntu2.md) | Jan 16, 2026 |
| Linux | bluez-obexd Ubuntu 25.04 (plucky) | 5.62-0ubuntu2 | [bluez-obexd 5.62-0ubuntu2](https://patchblox.com/security/data/fix/linux/ubuntu-plucky-bluez-obexd-5.62-0ubuntu2.md) | Jan 16, 2026 |
| Linux | bluez-obexd almalinux 8 | 5.56-3.el8 | [ALSA-2022:2081](https://patchblox.com/security/data/fix/linux/alsa-2022-2081.md) | May 10, 2022 |
| Linux | bluez-obexd ol 8 | 0:5.56-3.el8 | [ELSA-2022-2081](https://patchblox.com/security/data/fix/linux/elsa-2022-2081.md) | May 17, 2022 |
| Linux | bluez-source Ubuntu 24.10 (oracular) | 5.62-0ubuntu2 | [bluez-source 5.62-0ubuntu2](https://patchblox.com/security/data/fix/linux/ubuntu-oracular-bluez-source-5.62-0ubuntu2.md) | Jan 16, 2026 |
| Linux | bluez-source Ubuntu 25.04 (plucky) | 5.62-0ubuntu2 | [bluez-source 5.62-0ubuntu2](https://patchblox.com/security/data/fix/linux/ubuntu-plucky-bluez-source-5.62-0ubuntu2.md) | Jan 16, 2026 |
| Linux | bluez-test-scripts Ubuntu 24.10 (oracular) | 5.62-0ubuntu2 | [bluez-test-scripts 5.62-0ubuntu2](https://patchblox.com/security/data/fix/linux/ubuntu-oracular-bluez-test-scripts-5.62-0ubuntu2.md) | Jan 16, 2026 |
| Linux | bluez-test-scripts Ubuntu 25.04 (plucky) | 5.62-0ubuntu2 | [bluez-test-scripts 5.62-0ubuntu2](https://patchblox.com/security/data/fix/linux/ubuntu-plucky-bluez-test-scripts-5.62-0ubuntu2.md) | Jan 16, 2026 |
| Linux | bluez-test-tools Ubuntu 24.10 (oracular) | 5.62-0ubuntu2 | [bluez-test-tools 5.62-0ubuntu2](https://patchblox.com/security/data/fix/linux/ubuntu-oracular-bluez-test-tools-5.62-0ubuntu2.md) | Jan 16, 2026 |
| Linux | bluez-test-tools Ubuntu 25.04 (plucky) | 5.62-0ubuntu2 | [bluez-test-tools 5.62-0ubuntu2](https://patchblox.com/security/data/fix/linux/ubuntu-plucky-bluez-test-tools-5.62-0ubuntu2.md) | Jan 16, 2026 |
| Linux | bluez-tests Ubuntu 18.04.6 LTS (bionic) | 5.48-0ubuntu3.6 | [bluez-tests 5.48-0ubuntu3.6](https://patchblox.com/security/data/fix/linux/ubuntu-bionic-bluez-tests-5.48-0ubuntu3.6.md) | Nov 29, 2021 |
| Linux | bluez-tests Ubuntu 20.04 LTS (focal) | 5.53-0ubuntu3.4 | [bluez-tests 5.53-0ubuntu3.4](https://patchblox.com/security/data/fix/linux/ubuntu-focal-bluez-tests-5.53-0ubuntu3.4.md) | Nov 12, 2021 |
| Linux | bluez-tests Ubuntu 22.04.1 LTS (jammy) | 5.62-0ubuntu2 | [bluez-tests 5.62-0ubuntu2](https://patchblox.com/security/data/fix/linux/ubuntu-jammy-bluez-tests-5.62-0ubuntu2.md) | Nov 12, 2021 |
| Linux | libbluetooth3 Ubuntu 18.04.6 LTS (bionic) | 5.48-0ubuntu3.6 | [libbluetooth3 5.48-0ubuntu3.6](https://patchblox.com/security/data/fix/linux/ubuntu-bionic-libbluetooth3-5.48-0ubuntu3.6.md) | Nov 29, 2021 |
| Linux | libbluetooth3 Ubuntu 20.04 LTS (focal) | 5.53-0ubuntu3.4 | [libbluetooth3 5.53-0ubuntu3.4](https://patchblox.com/security/data/fix/linux/ubuntu-focal-libbluetooth3-5.53-0ubuntu3.4.md) | Nov 12, 2021 |
| Linux | libbluetooth3 Ubuntu 22.04.1 LTS (jammy) | 5.62-0ubuntu2 | [libbluetooth3 5.62-0ubuntu2](https://patchblox.com/security/data/fix/linux/ubuntu-jammy-libbluetooth3-5.62-0ubuntu2.md) | Nov 12, 2021 |
| Linux | libbluetooth3 Ubuntu 24.10 (oracular) | 5.62-0ubuntu2 | [libbluetooth3 5.62-0ubuntu2](https://patchblox.com/security/data/fix/linux/ubuntu-oracular-libbluetooth3-5.62-0ubuntu2.md) | Jan 16, 2026 |
| Linux | libbluetooth3 Ubuntu 25.04 (plucky) | 5.62-0ubuntu2 | [libbluetooth3 5.62-0ubuntu2](https://patchblox.com/security/data/fix/linux/ubuntu-plucky-libbluetooth3-5.62-0ubuntu2.md) | Jan 16, 2026 |

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