CVE-2026-80186
Bluez: stack overflow in name2utf8 causes dos and potential code execution
What happened?
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 software and versions
| Software | Version information | Fixed version |
|---|---|---|
| bluezRed Hat | Default status: affected | See vendor advisory |
| bluezRed Hat | Default status: unaffected | See vendor advisory |
| bluezRed Hat | Default status: affected | See vendor advisory |
| bluezRed Hat | Default status: affected | See vendor advisory |
| bluezRed Hat | Default status: affected | See vendor advisory |
Version information comes from the source record and can include unaffected products and exceptions. Distribution packages may contain backported fixes: an older upstream version alone does not prove a server is affected.
Is it being exploited?
This CVE was not listed in the CISA catalogue at our last retrieval. This does not establish that exploitation is absent.
How to respond
- Confirm the product, installed package version, and any configuration requirements in the vendor advisory.
- Follow the vendor’s remediation or workaround guidance in the references below. Structured fixed-version data is unavailable here; the publisher’s description may include a fix or workaround.
- Restart affected services if required, then verify the running version. Known exploitation may warrant investigation as well as patching.