Vulnerability · Published Aug 25, 2026 · Assigned by redhat
CVE-2026-80186Bluez: stack overflow in name2utf8 causes dos and potential code execution
High 7.6
In plain English
A high-severity buffer overflow in Red Hat Enterprise Linux 10 from Red Hat. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.5% (higher than 43% of all known vulnerabilities). Fixed versions are available - upgrade the affected package.
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.
Affected packages & fixed versions
| Ecosystem | Package | Fixed in | Advisory |
|---|---|---|---|
| Debian:12 | bluez | no fix listed | DEBIAN-CVE-2026-80186 |
| Debian:13 | bluez | no fix listed | DEBIAN-CVE-2026-80186 |
| Debian:14 | bluez | 5.87-3 | DEBIAN-CVE-2026-80186 |
| Ubuntu:22.04:LTS | bluez | 5.64-0ubuntu1.5 | UBUNTU-CVE-2026-80186 |
| Ubuntu:22.04:LTS | bluez | 5.64-0ubuntu1.5 | USN-8908-1 |
| Ubuntu:24.04:LTS | bluez | 5.72-0ubuntu5.7 | USN-8908-1 |
| Ubuntu:24.04:LTS | bluez | 5.72-0ubuntu5.7 | UBUNTU-CVE-2026-80186 |
| Ubuntu:26.04:LTS | bluez | 5.85-4ubuntu0.3 | USN-8908-1 |
| Ubuntu:26.04:LTS | bluez | 5.85-4ubuntu0.3 | UBUNTU-CVE-2026-80186 |
| Ubuntu:26.10 | bluez | no fix listed | UBUNTU-CVE-2026-80186 |
Affected products (as reported)
| Vendor | Product | Versions |
|---|---|---|
| Red Hat | Red Hat Enterprise Linux 10 | see references |
| Red Hat | Red Hat Enterprise Linux 6 | see references |
| Red Hat | Red Hat Enterprise Linux 7 | see references |
| Red Hat | Red Hat Enterprise Linux 8 | see references |
| Red Hat | Red Hat Enterprise Linux 9 | see references |
Weakness: CWE-120 · Vector: CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:H
References
- https://access.redhat.com/security/cve/CVE-2026-80186 vdb-entry, x_refsource_REDHAT
- RHBZ#2524132 issue-tracking, x_refsource_REDHAT
- https://github.com/bluez/bluez/security/advisories/GHSA-68h6-5qgp-3975