Home / mailings

PDF

[USN-8908-2] BlueZ regression

Posted on 14 October 2026
Ubuntu Security

==========================================================================Ubuntu Security Notice USN-8908-2
October 13, 2026

bluez regression
==========================================================================
A security issue affects these releases of Ubuntu and its derivatives:

- Ubuntu 26.04 LTS
- Ubuntu 24.04 LTS
- Ubuntu 22.04 LTS
- Ubuntu 20.04 LTS

Summary:

USN-8908-1 introduced a regression in BlueZ

Software Description:
- bluez: Bluetooth tools and daemons

Details:

USN-8908-1 fixed vulnerabilities in BlueZ. Unfortunately, that update introduced a
regression in the A2DP profile: cached remote stream endpoints were no
longer loaded at startup, which could cause Bluetooth audio devices to
fail to reconnect automatically or to fall back to low-quality audio
profiles. This update fixes the problem.

We apologize for the inconvenience.

Original advisory details:

Michael Bommarito discovered that BlueZ incorrectly handled codec
capability storage in the A2DP profile. An attacker could possibly
use this issue to cause a stack buffer overflow, resulting in a denial
of service or arbitrary code execution. This issue only affected Ubuntu
20.04 LTS, Ubuntu 22.04 LTS, Ubuntu 24.04 LTS and Ubuntu 26.04 LTS.
(CVE-2026-19774)

It was discovered that BlueZ incorrectly handled packet length validation.
An attacker could possibly use this issue to read out of bounds memory,
causing a crash or exposing sensitive information. (CVE-2026-75032)

It was discovered that BlueZ incorrectly handled crafted XML input. An
attacker could possibly use this issue to crash BlueZ, resulting in a
denial of service. (CVE-2026-80185)

It was discovered that BlueZ incorrectly parsed remote names from Extended
Inquiry Response data. An attacker could possibly use this issue to cause a
stack buffer overflow, resulting in a denial of service or arbitrary code
execution. (CVE-2026-80186)

Alexandro Calo discovered that BlueZ incorrectly parsed certain responses
in the AVRCP profile. An attacker could possibly use this issue to access
out of bounds memory, causing a crash or exposing sensitive information.
(CVE-2026-85218)

Update instructions:

The problem can be corrected by updating your system to the following
package versions:

Ubuntu 26.04 LTS
bluez 5.85-4ubuntu0.4

Ubuntu 24.04 LTS
bluez 5.72-0ubuntu5.8

Ubuntu 22.04 LTS
bluez 5.64-0ubuntu1.6

Ubuntu 20.04 LTS
bluez 5.53-0ubuntu3.9+esm2
Available with Ubuntu Pro

In general, a standard system update will make all the necessary changes.

References:
https://ubuntu.com/security/notices/USN-8908-2
https://ubuntu.com/security/notices/USN-8908-1
https://launchpad.net/bugs/2170509
CVE-2026-19774

Package Information:
https://launchpad.net/ubuntu/+source/bluez/5.85-4ubuntu0.4
https://launchpad.net/ubuntu/+source/bluez/5.72-0ubuntu5.8
https://launchpad.net/ubuntu/+source/bluez/5.64-0ubuntu1.6

--===============1708540943171460598==Content-Type: application/pgp-signature; name="signature.asc"
Content-Description: OpenPGP digital signature

 

TOP