Buffer overflow in Bluez
CVE-2026-19774
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.
Vulnerability class: Buffer Overflow
CVSS v3 metric
CVSS v3 base score 7.1 (High). Vector: CVSS:3.0/AV:A/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:H.
Affected products
- Bluez — versions b138a0849ba26310c3f40e78037565ce274d8737
Weakness classification (CWE)
References
- zdi-disclosures@trendmicro.com (x_research-advisory)
- zdi-disclosures@trendmicro.com (vendor-advisory)
Frequently asked questions
- What is CVE-2026-19774?
- CVE-2026-19774 is a high-severity vulnerability in Bluez, classified under Stack-based Buffer Overflow. CVSS score: 7.1/10. Published 2026-09-15.
- How severe is CVE-2026-19774?
- High severity. CVSS v3 base score is 7.1 out of 10.