Skip to content
Fencer Vulns
high 7.6

CVE-2026-80186 json

Bluez: stack overflow in name2utf8 causes dos and potential code execution

published 2026-08-25 2 mo ago modified 2026-11-05 4 d ago also EUVD-2026-66133

cvss
7.6
version 3.1, CNA
cisa kev
Not listed
not in CISA's catalog
epss
0.5%
EPSS 0.5% chance of exploitation in 30 days, percentile 43%
public exploits
0
none known

Summary

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.

Patch / fix

  • bluez Debian 14 5.87-3

debian advisories DEBIAN-CVE-2026-80186

  • bluez Ubuntu 22.04 LTS 5.64-0ubuntu1.5
  • bluez Ubuntu 24.04 LTS 5.72-0ubuntu5.7
  • bluez Ubuntu 26.04 LTS 5.85-4ubuntu0.3
  • bluez Ubuntu Pro 16.04 LTS 5.37-0ubuntu5.3+esm6
  • bluez Ubuntu Pro 18.04 LTS 5.48-0ubuntu3.9+esm3
  • bluez Ubuntu Pro 20.04 LTS 5.53-0ubuntu3.9+esm1

ubuntu advisories UBUNTU-CVE-2026-80186

Ubuntu security data © Canonical Ltd., from https://github.com/canonical/ubuntu-security-notices via OSV; changed: normalised to fixed package versions per release. CC BY-SA 4.0

Vendor advisories

What the vendors themselves say about their products: affected, fixed or not affected, and what to do.

red hat product security vex CVE-2026-80186 updated cvss 7.6

bluez: Stack Overflow in name2utf8 causes DoS and potential code execution

  • Red Hat Enterprise Linux 7 bluez, bluez-cups, bluez-libs, bluez-hid2hci Red Hat Enterprise Linux 8 bluez, bluez-cups, bluez-libs, bluez-obexd, bluez-hid2hci Red Hat Enterprise Linux 9 bluez, bluez-cups, bluez-libs, bluez-obexd Red Hat Enterprise Linux 10 bluez
    affected: workaround, no fix available
  • Red Hat Enterprise Linux 6 bluez, bluez-alsa, bluez-cups, bluez-libs, bluez-compat, bluez-gstreamer
    not affected: vulnerable code not present

Red Hat CSAF VEX © Red Hat, Inc., from https://security.access.redhat.com/data/csaf/v2/vex/; changed: reduced to product statuses and remediations. CC BY 4.0 · csaf

CISA SSVC

Exploitation
none
Automatable
no
Technical impact
partial
Assessed
2 mo ago

Exploit prediction

0.50% chance of exploitation in the next 30 days, higher than 43% of all scored CVEs (FIRST EPSS, 2026-11-08).

CVSS scores

assigned by version score vector
CNA 3.1 7.6 CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:H

Affected products

  • Red Hat Red Hat Enterprise Linux 10
  • Red Hat Red Hat Enterprise Linux 6
  • Red Hat Red Hat Enterprise Linux 7
  • Red Hat Red Hat Enterprise Linux 8
  • Red Hat Red Hat Enterprise Linux 9

Classification

Weakness
  • CWE-120 Buffer Copy without Checking Size of Input

References

Sources

Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.