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Fencer Intel
high 7.6

CVE-2026-80186 json

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

published 2mo ago modified 7d ago also EUVD-2026-66133 , GHSA-68h6-5qgp-3975

Unreviewed: the maintainers' own advisory

Published by the maintainers on their GitHub repository bluez/bluez. GitHub has not reviewed it into the GitHub Advisory Database, so the affected packages and versions are the maintainers' word. Read the full advisory on GitHub.

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

Is CVE-2026-80186 in your stack? Fencer shows which of your repositories are affected as soon as an advisory lands, and opens the fix as a pull request.

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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
2mo ago

Exploit prediction

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

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 Intel 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.

The maintainers of bluez/bluez published their own advisory on GitHub. Reviewed sources take precedence over it.