CVE-2026-63871
kernel: Bluetooth: ISO: Fix data-race on iso_pi fields in hci_get_route calls
Severity
ModerateRed Hat Product Security
CVSS 3.1
Review impact separately from score.
Published · July 19, 2026
Updated · October 29, 2026
Description
A flaw was found in the Linux kernel's Bluetooth ISO subsystem. This vulnerability, a data-race, occurs because certain functions access socket-related data without proper synchronization. Specifically, iso_connect_bis(), iso_connect_cis(), iso_listen_bis(), and iso_conn_big_sync() can read critical fields while they are being modified by other operations like connect() or setsockopt(). This concurrent access can lead to unpredictable system behavior and potential integrity issues.
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 · 4.8CVSS:3.1/AV:A/AC:H/PR:L/UI:N/S:U/C:N/I:N/A:H
CWE-820 · Missing Synchronization