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CVE-2026-53254

kernel: Bluetooth: RFCOMM: validate skb length in MCC handlers

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Severity

Moderate

Red Hat Product Security

7

CVSS 3.1

Review impact separately from score.

Published · June 25, 2026

Updated · September 23, 2026

Description

A flaw was found in the Linux kernel's Bluetooth RFCOMM (Radio Frequency Communication) subsystem. A malicious remote device could exploit this vulnerability by sending specially crafted, truncated Multiplexing Control Channel (MCC) frames. This lack of proper validation of incoming data length before processing could lead to out-of-bounds reads, potentially resulting in information disclosure or a denial of service.

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 · 7
CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H

CWE-1284 · Improper Validation of Specified Quantity in Input