CVE-2026-80186 Bluez: stack overflow in name2utf8 causes dos and potential code execution
Remote attackers can crash the Bluetooth service or execute arbitrary code via crafted EIR packets during discovery in BlueZ.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Local or same network only
- Victim action needed
- Not needed
- Fix
- Available
What is CVE-2026-80186?
CVE-2026-80186 is a high-severity memory corruption vulnerability in Red Hat Enterprise Linux 10, published on 25 Aug 2026. It can only be exploited from the same machine or local network, with no action from the victim.
Official 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.
Weakness: CWE-120
Which versions are affected by CVE-2026-80186?
How do I fix CVE-2026-80186?
Apply the vendor's patch.
Upgrade to the fixed version. Memory-safe languages, compiler hardening and fuzzing prevent most new cases. More about Memory corruption.
Is CVE-2026-80186 being exploited?
There is no known exploitation of CVE-2026-80186 in the wild and no public exploit code.
Sources
Also known as BELL-CVE-2026-80186, DEBIAN-CVE-2026-80186, GHSA-f784-6479-v89p, ROOT-OS-DEBIAN-11-CVE-2026-80186, ROOT-OS-DEBIAN-12-CVE-2026-80186, ROOT-OS-DEBIAN-13-CVE-2026-80186 and 1 more.