# CVE-2026-80186: Bluez: stack overflow in name2utf8 causes dos and potential code execution

Status: published. Published: 2026-08-25. Updated: 2026-11-04.

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.

## Remediation

- workaround: Mitigation for this issue is either not available or the currently available options do not meet the Red Hat Product Security criteria comprising ease of use and deployment, applicability to widespread installation base, or stability. (source: CNA: redhat)

## Affected products and versions

- Red Hat / Red Hat Enterprise Linux 10 (bluez): Version range not reported. Source: CNA: redhat
- Red Hat / Red Hat Enterprise Linux 6 (bluez): Version range not reported. Source: CNA: redhat
- Red Hat / Red Hat Enterprise Linux 7 (bluez): Version range not reported. Source: CNA: redhat
- Red Hat / Red Hat Enterprise Linux 8 (bluez): Version range not reported. Source: CNA: redhat
- Red Hat / Red Hat Enterprise Linux 9 (bluez): Version range not reported. Source: CNA: redhat

## Severity and prioritization

- CVSS 3.1: 7.6 (high); CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:H; source: CNA: redhat

- CISA KEV: No listing in collected sources

- EPSS: 0.50% as of 2026-11-04; percentile 43.03%

- SSVC: exploitation none; automatable no; technical impact partial; source ADP: CISA-ADP

- Weaknesses: CWE-120

## Exploit evidence

No exploit evidence in collected sources. This is not proof of no exploitation.

## References

- https://access.redhat.com/security/cve/CVE-2026-80186 (CNA: redhat; vdb-entry, x_refsource_REDHAT)

- https://bugzilla.redhat.com/show_bug.cgi?id=2524132 (CNA: redhat; issue-tracking, x_refsource_REDHAT)

- https://github.com/bluez/bluez/security/advisories/GHSA-68h6-5qgp-3975 (CNA: redhat)

## Provenance

- CNA: redhat: https://www.cve.org/CVERecord?id=CVE-2026-80186; retrieved 2026-11-05; source updated 2026-11-04

- FIRST EPSS: https://api.first.org/data/v1/epss?cve=CVE-2026-80186; retrieved 2026-11-05; source updated Not reported

Revision: 912548e4ef92d541b724ff7f9f7103b95cb4f43f394ab26afa7b85ab96f1297f

Canonical: https://y2.dev/cve/CVE-2026-80186

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