# CVE-2026-80186: bluez: A stack-based buffer overflow vulnerability exists in BlueZ, the Linux Bluetooth protocol stack

CVE-2026-80186 is fixed in 25 products on 1 platform, first by bluetooth 5.48-0ubuntu3.9+esm3, released September 6, 2026. It is not reported as exploited. Patch Radar priority: High.

- Web page: https://patchblox.com/security/cve/CVE-2026-80186
- Priority: High
- CVSS: 7.6 (high)
- EPSS: 0.0050
- CISA KEV: not listed
- Exploited (vendor report): no
- Publicly disclosed: no
- Published: Aug 25, 2026

## Description

A stack-based buffer overflow vulnerability exists in BlueZ, the Linux Bluetooth protocol stack. A remote user within Bluetooth radio range can send a specially crafted Extended Inquiry Response (EIR) packet that causes a buffer overflow when the target device performs Bluetooth discovery. This vulnerability can lead to a Denial of Service (DoS) by crashing the bluetoothd service and may allow for arbitrary code execution.

## Where it's fixed

| Platform | Product | Fixed in | Fix | Released |
|---|---|---|---|---|
| Linux | bluetooth Ubuntu 18.04.6 LTS (bionic) | 5.48-0ubuntu3.9+esm3 | [bluetooth 5.48-0ubuntu3.9+esm3](https://patchblox.com/security/data/fix/linux/ubuntu-bionic-bluetooth-5.48-0ubuntu3.9-esm3.md) | Sep 6, 2026 |
| Linux | bluetooth Ubuntu 20.04 LTS (focal) | 5.53-0ubuntu3.9+esm1 | [bluetooth 5.53-0ubuntu3.9+esm1](https://patchblox.com/security/data/fix/linux/ubuntu-focal-bluetooth-5.53-0ubuntu3.9-esm1.md) | Oct 12, 2026 |
| Linux | bluetooth Ubuntu 22.04.1 LTS (jammy) | 5.64-0ubuntu1.5 | [bluetooth 5.64-0ubuntu1.5](https://patchblox.com/security/data/fix/linux/ubuntu-jammy-bluetooth-5.64-0ubuntu1.5.md) | Oct 12, 2026 |
| Linux | bluetooth Ubuntu 24.04.5 LTS (noble) | 5.72-0ubuntu5.7 | [bluetooth 5.72-0ubuntu5.7](https://patchblox.com/security/data/fix/linux/ubuntu-noble-bluetooth-5.72-0ubuntu5.7.md) | Oct 12, 2026 |
| Linux | bluetooth Ubuntu 26.04.1 LTS (resolute) | 5.85-4ubuntu0.3 | [bluetooth 5.85-4ubuntu0.3](https://patchblox.com/security/data/fix/linux/ubuntu-resolute-bluetooth-5.85-4ubuntu0.3.md) | Sep 15, 2026 |
| Linux | bluez Debian 14 | 5.87-3 | [DEBIAN-CVE-2026-80186](https://patchblox.com/security/data/fix/linux/debian-cve-2026-80186.md) | Sep 12, 2026 |
| Linux | bluez Ubuntu 18.04.6 LTS (bionic) | 5.48-0ubuntu3.9+esm3 | [bluez 5.48-0ubuntu3.9+esm3](https://patchblox.com/security/data/fix/linux/ubuntu-bionic-bluez-5.48-0ubuntu3.9-esm3.md) | Sep 6, 2026 |
| Linux | bluez Ubuntu 20.04 LTS (focal) | 5.53-0ubuntu3.9+esm1 | [bluez 5.53-0ubuntu3.9+esm1](https://patchblox.com/security/data/fix/linux/ubuntu-focal-bluez-5.53-0ubuntu3.9-esm1.md) | Oct 12, 2026 |
| Linux | bluez Ubuntu 22.04.1 LTS (jammy) | 5.64-0ubuntu1.5 | [bluez 5.64-0ubuntu1.5](https://patchblox.com/security/data/fix/linux/ubuntu-jammy-bluez-5.64-0ubuntu1.5.md) | Oct 12, 2026 |
| Linux | bluez Ubuntu 24.04.5 LTS (noble) | 5.72-0ubuntu5.7 | [bluez 5.72-0ubuntu5.7](https://patchblox.com/security/data/fix/linux/ubuntu-noble-bluez-5.72-0ubuntu5.7.md) | Oct 12, 2026 |
| Linux | bluez Ubuntu 26.04.1 LTS (resolute) | 5.85-4ubuntu0.3 | [bluez 5.85-4ubuntu0.3](https://patchblox.com/security/data/fix/linux/ubuntu-resolute-bluez-5.85-4ubuntu0.3.md) | Sep 15, 2026 |
| Linux | bluez amzn 2023 | 5.62-2.amzn2023.0.6 | [ALAS2023-2026-2146](https://patchblox.com/security/data/fix/linux/alas2023-2026-2146.md) | Sep 14, 2026 |
| Linux | bluez-cups Ubuntu 18.04.6 LTS (bionic) | 5.48-0ubuntu3.9+esm3 | [bluez-cups 5.48-0ubuntu3.9+esm3](https://patchblox.com/security/data/fix/linux/ubuntu-bionic-bluez-cups-5.48-0ubuntu3.9-esm3.md) | Sep 6, 2026 |
| Linux | bluez-cups Ubuntu 20.04 LTS (focal) | 5.53-0ubuntu3.9+esm1 | [bluez-cups 5.53-0ubuntu3.9+esm1](https://patchblox.com/security/data/fix/linux/ubuntu-focal-bluez-cups-5.53-0ubuntu3.9-esm1.md) | Oct 12, 2026 |
| Linux | bluez-cups Ubuntu 22.04.1 LTS (jammy) | 5.64-0ubuntu1.5 | [bluez-cups 5.64-0ubuntu1.5](https://patchblox.com/security/data/fix/linux/ubuntu-jammy-bluez-cups-5.64-0ubuntu1.5.md) | Oct 12, 2026 |
| Linux | bluez-cups Ubuntu 24.04.5 LTS (noble) | 5.72-0ubuntu5.7 | [bluez-cups 5.72-0ubuntu5.7](https://patchblox.com/security/data/fix/linux/ubuntu-noble-bluez-cups-5.72-0ubuntu5.7.md) | Oct 12, 2026 |
| Linux | bluez-cups Ubuntu 26.04.1 LTS (resolute) | 5.85-4ubuntu0.3 | [bluez-cups 5.85-4ubuntu0.3](https://patchblox.com/security/data/fix/linux/ubuntu-resolute-bluez-cups-5.85-4ubuntu0.3.md) | Sep 15, 2026 |
| Linux | bluez-cups amzn 2023 | 5.62-2.amzn2023.0.6 | [ALAS2023-2026-2146](https://patchblox.com/security/data/fix/linux/alas2023-2026-2146.md) | Sep 14, 2026 |
| Linux | bluez-cups-debuginfo amzn 2023 | 5.62-2.amzn2023.0.6 | [ALAS2023-2026-2146](https://patchblox.com/security/data/fix/linux/alas2023-2026-2146.md) | Sep 14, 2026 |
| Linux | bluez-debuginfo amzn 2023 | 5.62-2.amzn2023.0.6 | [ALAS2023-2026-2146](https://patchblox.com/security/data/fix/linux/alas2023-2026-2146.md) | Sep 14, 2026 |
| Linux | bluez-debugsource amzn 2023 | 5.62-2.amzn2023.0.6 | [ALAS2023-2026-2146](https://patchblox.com/security/data/fix/linux/alas2023-2026-2146.md) | Sep 14, 2026 |
| Linux | bluez-deprecated amzn 2023 | 5.62-2.amzn2023.0.6 | [ALAS2023-2026-2146](https://patchblox.com/security/data/fix/linux/alas2023-2026-2146.md) | Sep 14, 2026 |
| Linux | bluez-deprecated-debuginfo amzn 2023 | 5.62-2.amzn2023.0.6 | [ALAS2023-2026-2146](https://patchblox.com/security/data/fix/linux/alas2023-2026-2146.md) | Sep 14, 2026 |
| Linux | bluez-hcidump Ubuntu 18.04.6 LTS (bionic) | 5.48-0ubuntu3.9+esm3 | [bluez-hcidump 5.48-0ubuntu3.9+esm3](https://patchblox.com/security/data/fix/linux/ubuntu-bionic-bluez-hcidump-5.48-0ubuntu3.9-esm3.md) | Sep 6, 2026 |
| Linux | bluez-hcidump Ubuntu 20.04 LTS (focal) | 5.53-0ubuntu3.9+esm1 | [bluez-hcidump 5.53-0ubuntu3.9+esm1](https://patchblox.com/security/data/fix/linux/ubuntu-focal-bluez-hcidump-5.53-0ubuntu3.9-esm1.md) | Oct 12, 2026 |
| Linux | bluez-hcidump Ubuntu 22.04.1 LTS (jammy) | 5.64-0ubuntu1.5 | [bluez-hcidump 5.64-0ubuntu1.5](https://patchblox.com/security/data/fix/linux/ubuntu-jammy-bluez-hcidump-5.64-0ubuntu1.5.md) | Oct 12, 2026 |
| Linux | bluez-hcidump Ubuntu 24.04.5 LTS (noble) | 5.72-0ubuntu5.7 | [bluez-hcidump 5.72-0ubuntu5.7](https://patchblox.com/security/data/fix/linux/ubuntu-noble-bluez-hcidump-5.72-0ubuntu5.7.md) | Oct 12, 2026 |
| Linux | bluez-hcidump Ubuntu 26.04.1 LTS (resolute) | 5.85-4ubuntu0.3 | [bluez-hcidump 5.85-4ubuntu0.3](https://patchblox.com/security/data/fix/linux/ubuntu-resolute-bluez-hcidump-5.85-4ubuntu0.3.md) | Sep 15, 2026 |
| Linux | bluez-hid2hci amzn 2023 | 5.62-2.amzn2023.0.6 | [ALAS2023-2026-2146](https://patchblox.com/security/data/fix/linux/alas2023-2026-2146.md) | Sep 14, 2026 |
| Linux | bluez-hid2hci-debuginfo amzn 2023 | 5.62-2.amzn2023.0.6 | [ALAS2023-2026-2146](https://patchblox.com/security/data/fix/linux/alas2023-2026-2146.md) | Sep 14, 2026 |
| Linux | bluez-libs amzn 2023 | 5.62-2.amzn2023.0.6 | [ALAS2023-2026-2146](https://patchblox.com/security/data/fix/linux/alas2023-2026-2146.md) | Sep 14, 2026 |
| Linux | bluez-libs-debuginfo amzn 2023 | 5.62-2.amzn2023.0.6 | [ALAS2023-2026-2146](https://patchblox.com/security/data/fix/linux/alas2023-2026-2146.md) | Sep 14, 2026 |
| Linux | bluez-libs-devel amzn 2023 | 5.62-2.amzn2023.0.6 | [ALAS2023-2026-2146](https://patchblox.com/security/data/fix/linux/alas2023-2026-2146.md) | Sep 14, 2026 |
| Linux | bluez-libs-devel-debuginfo amzn 2023 | 5.62-2.amzn2023.0.6 | [ALAS2023-2026-2146](https://patchblox.com/security/data/fix/linux/alas2023-2026-2146.md) | Sep 14, 2026 |
| Linux | bluez-mesh amzn 2023 | 5.62-2.amzn2023.0.6 | [ALAS2023-2026-2146](https://patchblox.com/security/data/fix/linux/alas2023-2026-2146.md) | Sep 14, 2026 |
| Linux | bluez-mesh-debuginfo amzn 2023 | 5.62-2.amzn2023.0.6 | [ALAS2023-2026-2146](https://patchblox.com/security/data/fix/linux/alas2023-2026-2146.md) | Sep 14, 2026 |
| Linux | bluez-meshd Ubuntu 22.04.1 LTS (jammy) | 5.64-0ubuntu1.5 | [bluez-meshd 5.64-0ubuntu1.5](https://patchblox.com/security/data/fix/linux/ubuntu-jammy-bluez-meshd-5.64-0ubuntu1.5.md) | Oct 12, 2026 |
| Linux | bluez-meshd Ubuntu 24.04.5 LTS (noble) | 5.72-0ubuntu5.7 | [bluez-meshd 5.72-0ubuntu5.7](https://patchblox.com/security/data/fix/linux/ubuntu-noble-bluez-meshd-5.72-0ubuntu5.7.md) | Oct 12, 2026 |
| Linux | bluez-meshd Ubuntu 26.04.1 LTS (resolute) | 5.85-4ubuntu0.3 | [bluez-meshd 5.85-4ubuntu0.3](https://patchblox.com/security/data/fix/linux/ubuntu-resolute-bluez-meshd-5.85-4ubuntu0.3.md) | Sep 15, 2026 |
| Linux | bluez-obexd Ubuntu 18.04.6 LTS (bionic) | 5.48-0ubuntu3.9+esm3 | [bluez-obexd 5.48-0ubuntu3.9+esm3](https://patchblox.com/security/data/fix/linux/ubuntu-bionic-bluez-obexd-5.48-0ubuntu3.9-esm3.md) | Sep 6, 2026 |
| Linux | bluez-obexd Ubuntu 20.04 LTS (focal) | 5.53-0ubuntu3.9+esm1 | [bluez-obexd 5.53-0ubuntu3.9+esm1](https://patchblox.com/security/data/fix/linux/ubuntu-focal-bluez-obexd-5.53-0ubuntu3.9-esm1.md) | Oct 12, 2026 |
| Linux | bluez-obexd Ubuntu 22.04.1 LTS (jammy) | 5.64-0ubuntu1.5 | [bluez-obexd 5.64-0ubuntu1.5](https://patchblox.com/security/data/fix/linux/ubuntu-jammy-bluez-obexd-5.64-0ubuntu1.5.md) | Oct 12, 2026 |
| Linux | bluez-obexd Ubuntu 24.04.5 LTS (noble) | 5.72-0ubuntu5.7 | [bluez-obexd 5.72-0ubuntu5.7](https://patchblox.com/security/data/fix/linux/ubuntu-noble-bluez-obexd-5.72-0ubuntu5.7.md) | Oct 12, 2026 |
| Linux | bluez-obexd Ubuntu 26.04.1 LTS (resolute) | 5.85-4ubuntu0.3 | [bluez-obexd 5.85-4ubuntu0.3](https://patchblox.com/security/data/fix/linux/ubuntu-resolute-bluez-obexd-5.85-4ubuntu0.3.md) | Sep 15, 2026 |
| Linux | bluez-obexd amzn 2023 | 5.62-2.amzn2023.0.6 | [ALAS2023-2026-2146](https://patchblox.com/security/data/fix/linux/alas2023-2026-2146.md) | Sep 14, 2026 |
| Linux | bluez-obexd-debuginfo amzn 2023 | 5.62-2.amzn2023.0.6 | [ALAS2023-2026-2146](https://patchblox.com/security/data/fix/linux/alas2023-2026-2146.md) | Sep 14, 2026 |
| Linux | bluez-source Ubuntu 24.04.5 LTS (noble) | 5.72-0ubuntu5.7 | [bluez-source 5.72-0ubuntu5.7](https://patchblox.com/security/data/fix/linux/ubuntu-noble-bluez-source-5.72-0ubuntu5.7.md) | Oct 12, 2026 |
| Linux | bluez-source Ubuntu 26.04.1 LTS (resolute) | 5.85-4ubuntu0.3 | [bluez-source 5.85-4ubuntu0.3](https://patchblox.com/security/data/fix/linux/ubuntu-resolute-bluez-source-5.85-4ubuntu0.3.md) | Sep 15, 2026 |
| Linux | bluez-test-scripts Ubuntu 24.04.5 LTS (noble) | 5.72-0ubuntu5.7 | [bluez-test-scripts 5.72-0ubuntu5.7](https://patchblox.com/security/data/fix/linux/ubuntu-noble-bluez-test-scripts-5.72-0ubuntu5.7.md) | Oct 12, 2026 |
| Linux | bluez-test-scripts Ubuntu 26.04.1 LTS (resolute) | 5.85-4ubuntu0.3 | [bluez-test-scripts 5.85-4ubuntu0.3](https://patchblox.com/security/data/fix/linux/ubuntu-resolute-bluez-test-scripts-5.85-4ubuntu0.3.md) | Sep 15, 2026 |
| Linux | bluez-test-tools Ubuntu 24.04.5 LTS (noble) | 5.72-0ubuntu5.7 | [bluez-test-tools 5.72-0ubuntu5.7](https://patchblox.com/security/data/fix/linux/ubuntu-noble-bluez-test-tools-5.72-0ubuntu5.7.md) | Oct 12, 2026 |
| Linux | bluez-test-tools Ubuntu 26.04.1 LTS (resolute) | 5.85-4ubuntu0.3 | [bluez-test-tools 5.85-4ubuntu0.3](https://patchblox.com/security/data/fix/linux/ubuntu-resolute-bluez-test-tools-5.85-4ubuntu0.3.md) | Sep 15, 2026 |
| Linux | bluez-tests Ubuntu 18.04.6 LTS (bionic) | 5.48-0ubuntu3.9+esm3 | [bluez-tests 5.48-0ubuntu3.9+esm3](https://patchblox.com/security/data/fix/linux/ubuntu-bionic-bluez-tests-5.48-0ubuntu3.9-esm3.md) | Sep 6, 2026 |
| Linux | bluez-tests Ubuntu 20.04 LTS (focal) | 5.53-0ubuntu3.9+esm1 | [bluez-tests 5.53-0ubuntu3.9+esm1](https://patchblox.com/security/data/fix/linux/ubuntu-focal-bluez-tests-5.53-0ubuntu3.9-esm1.md) | Oct 12, 2026 |
| Linux | bluez-tests Ubuntu 22.04.1 LTS (jammy) | 5.64-0ubuntu1.5 | [bluez-tests 5.64-0ubuntu1.5](https://patchblox.com/security/data/fix/linux/ubuntu-jammy-bluez-tests-5.64-0ubuntu1.5.md) | Oct 12, 2026 |
| Linux | libbluetooth3 Ubuntu 18.04.6 LTS (bionic) | 5.48-0ubuntu3.9+esm3 | [libbluetooth3 5.48-0ubuntu3.9+esm3](https://patchblox.com/security/data/fix/linux/ubuntu-bionic-libbluetooth3-5.48-0ubuntu3.9-esm3.md) | Sep 6, 2026 |
| Linux | libbluetooth3 Ubuntu 20.04 LTS (focal) | 5.53-0ubuntu3.9+esm1 | [libbluetooth3 5.53-0ubuntu3.9+esm1](https://patchblox.com/security/data/fix/linux/ubuntu-focal-libbluetooth3-5.53-0ubuntu3.9-esm1.md) | Oct 12, 2026 |
| Linux | libbluetooth3 Ubuntu 22.04.1 LTS (jammy) | 5.64-0ubuntu1.5 | [libbluetooth3 5.64-0ubuntu1.5](https://patchblox.com/security/data/fix/linux/ubuntu-jammy-libbluetooth3-5.64-0ubuntu1.5.md) | Oct 12, 2026 |
| Linux | libbluetooth3 Ubuntu 24.04.5 LTS (noble) | 5.72-0ubuntu5.7 | [libbluetooth3 5.72-0ubuntu5.7](https://patchblox.com/security/data/fix/linux/ubuntu-noble-libbluetooth3-5.72-0ubuntu5.7.md) | Oct 12, 2026 |
| Linux | libbluetooth3 Ubuntu 26.04.1 LTS (resolute) | 5.85-4ubuntu0.3 | [libbluetooth3 5.85-4ubuntu0.3](https://patchblox.com/security/data/fix/linux/ubuntu-resolute-libbluetooth3-5.85-4ubuntu0.3.md) | Sep 15, 2026 |

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