CVE-2026-53251

kernel: Bluetooth: ISO: Fix not releasing hdev reference on iso_conn_big_sync

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Severity

Low

Red Hat Product Security

5.5

CVSS 3.1

Review impact separately from score.

Published · June 25, 2026

Updated · October 29, 2026

Description

A flaw was found in the Linux kernel's Bluetooth subsystem. The hci_get_route() function, used in the ISO (Isochronous Stream) connection handling, fails to release a reference-counted hci_dev pointer. This resource leak could lead to a Denial of Service (DoS) condition.

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 · 5.5
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

CWE-772 · Missing Release of Resource after Effective Lifetime