Vulnerability · Published Sep 15, 2026 · Assigned by zdi
CVE-2026-19774BlueZ A2DP Stack-based Buffer Overflow Remote Code Execution Vulnerability
High 7.1
In plain English
A high-severity stack buffer overflow in BlueZ from BlueZ. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.3% (higher than 19% of all known vulnerabilities). Fixed versions are available - upgrade the affected package.
Official description
BlueZ A2DP Stack-based Buffer Overflow Remote Code Execution Vulnerability. This vulnerability allows network-adjacent attackers to execute arbitrary code on affected installations of BlueZ. An attacker must first obtain the ability to pair a malicious Bluetooth device with the target system in order to exploit this vulnerability. The specific flaw exists within the handling of the stream endpoints. The issue results from the lack of proper validation of the length of user-supplied data prior to copying it to a fixed-length stack-based buffer. An attacker can leverage this vulnerability to execute code in the context of root. Was ZDI-CAN-29429.
Affected packages & fixed versions
| Ecosystem | Package | Fixed in | Advisory |
|---|---|---|---|
| Debian:12 | bluez | no fix listed | DEBIAN-CVE-2026-19774 |
| Debian:13 | bluez | no fix listed | DEBIAN-CVE-2026-19774 |
| Debian:14 | bluez | 5.87-1 | DEBIAN-CVE-2026-19774 |
| Ubuntu:22.04:LTS | bluez | 5.64-0ubuntu1.5 | USN-8908-1 |
| Ubuntu:22.04:LTS | bluez | 5.64-0ubuntu1.6 | USN-8908-2 |
| Ubuntu:22.04:LTS | bluez | 5.64-0ubuntu1.5 | UBUNTU-CVE-2026-19774 |
| Ubuntu:24.04:LTS | bluez | 5.72-0ubuntu5.8 | USN-8908-2 |
| Ubuntu:24.04:LTS | bluez | 5.72-0ubuntu5.7 | UBUNTU-CVE-2026-19774 |
| Ubuntu:24.04:LTS | bluez | 5.72-0ubuntu5.7 | USN-8908-1 |
| Ubuntu:26.04:LTS | bluez | 5.85-4ubuntu0.3 | UBUNTU-CVE-2026-19774 |
| Ubuntu:26.04:LTS | bluez | 5.85-4ubuntu0.3 | USN-8908-1 |
| Ubuntu:26.04:LTS | bluez | 5.85-4ubuntu0.4 | USN-8908-2 |
| Ubuntu:26.10 | bluez | no fix listed | UBUNTU-CVE-2026-19774 |
Affected products (as reported)
Weakness: CWE-121 · Vector: CVSS:3.0/AV:A/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:H
References
- ZDI-26-589 x_research-advisory
- vendor-provided URL vendor-advisory