CVE-2023-53673

kernel: Bluetooth: hci_event: call disconnect callback before deleting conn

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Severity

Moderate

Red Hat Product Security

7.8

CVSS 3.1

Review impact separately from score.

Published · October 7, 2025

Updated · August 5, 2026

Description

A flaw was found in the Linux kernel in which a callback is not called when a Bluetooth peripheral is disconnected. This flaw leads to a use-after-free, which an attacker could use to escalate their privileges, corrupt system memory, or otherwise cause a denial of service.

Statement

This flaw has been fixed in RHEL versions 9.4 and later.

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 · 7.8
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

CWE-416 · Use After Free