CVE-2026-99009

kernel: Bluetooth: RFCOMM: connect the session socket without rfcomm_mutex

Loading…

Severity

Moderate

Red Hat Product Security

4.7

CVSS 3.1

Review impact separately from score.

Published · October 23, 2026

Updated · October 29, 2026

Description

A flaw was found in the Linux kernel's Bluetooth Radio Frequency Communication (RFCOMM) subsystem. A circular locking dependency can occur when an RFCOMM connection is initiated while a Bluetooth link is undergoing authentication or encryption. A local user can exploit this issue to trigger a deadlock, resulting in a system hang and a Denial of Service (DoS).

CVSS score applicability

The CVSS score(s) listed for this vulnerability do not reflect the associated product's status, and are included for informational purposes to better understand the severity of this vulnerability.

Mitigation

No mitigation is specified in collected source.

CVSS / CWE

CVSS 3.1 · 4.7
CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:N/I:N/A:H

CWE-833 · Deadlock