CVE-2026-99008

kernel: Bluetooth: RFCOMM: Fix NULL tty_dev dereference in rfcomm_dev_shutdown

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Severity

Moderate

Red Hat Product Security

4.1

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 subsystem. When an RFCOMM (Radio Frequency Communication) terminal device fails to register properly during initialization, closing the device triggers a null pointer dereference in the shutdown handler. A local attacker could exploit this vulnerability by opening and closing the affected device, leading to a system crash 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 · 4.1
CVSS:3.1/AV:L/AC:H/PR:H/UI:N/S:U/C:N/I:N/A:H

CWE-476 · NULL Pointer Dereference