CVE-2026-98736

kernel: Bluetooth: hci_conn: Lock parent access during enhanced SCO setup

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Severity

Moderate

Red Hat Product Security

4.7

CVSS 3.1

Review impact separately from score.

Published · October 18, 2026

Updated · October 23, 2026

Description

A flaw was found in the Linux kernel's Bluetooth subsystem. A race condition occurs during enhanced Synchronous Connection-Oriented (SCO) link setup due to missing locking when accessing parent connection structures. A local user or adjacent attacker could exploit this timing window by concurrently disconnecting the link, causing a use-after-free condition. This flaw could lead to a Denial of Service (DoS) via a system crash or potentially arbitrary code execution.

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-825 · Expired Pointer Dereference