What is CVE-2026-80186?

CVE-2026-80186 is a high-severity vulnerability in Red Hat Enterprise Linux 10, classified under Buffer Copy without Checking Size of Input (Classic Buffer Overflow). CVSS score: 7.6/10. Published 2026-08-25.

How severe is CVE-2026-80186?

High severity. CVSS v3 base score is 7.6 out of 10.

Buffer overflow in Red Hat Enterprise Linux 10

CVE-2026-80186

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.

Vulnerability class: Buffer Overflow

Published 2026-08-25 · last modified 2026-08-28.

CVSS v3 metric

CVSS v3 base score 7.6 (High). Vector: CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:H.

EPSS exploit prediction

EPSS: 0.005 (41.0th percentile), scored 2026-10-10.

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 41st percentile — 41.0% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.004 · newest: 0.005 · change: +0.001

Affected products

Weakness classification (CWE)

CWE-120 — Buffer Copy without Checking Size of Input (Classic Buffer Overflow)

References

access.redhat.com/security/cve/CVE-2026-80186 (vdb-entry)
bugzilla.redhat.com/show_bug.cgi (issue-tracking)
github.com/bluez/bluez/security/advisories/GHSA-68h6-5qgp-3975

Frequently asked questions

What is CVE-2026-80186?: CVE-2026-80186 is a high-severity vulnerability in Red Hat Enterprise Linux 10, classified under Buffer Copy without Checking Size of Input (Classic Buffer Overflow). CVSS score: 7.6/10. Published 2026-08-25.
How severe is CVE-2026-80186?: High severity. CVSS v3 base score is 7.6 out of 10.