CVE-2026-43119

A flaw was found in the Linux kernel Bluetooth HCI synchronous command infrastructure. Several paths read or wrote hdev->req_status without coordination while __hci_cmd_sync_sk() updates it under req_lock, and different workqueues could run those paths concurrently—creating data races that break wait/event correctness. Upstream documents the races and uses READ_ONCE()/WRITE_ONCE() on all concurrent accesses to hdev->req_status.

Red Hat acknowledges the upstream Linux kernel correction for «Bluetooth» as described in COMMENT_ZERO. Fixes are delivered through standard kernel errata for supported products. Operational exposure depends on whether this subsystem or driver is active in your configuration.

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.

To mitigate this issue, prevent the bluetooth module from being loaded. See https://access.redhat.com/solutions/41278 for instructions.