CVE-2026-74528 [HIGH] – In the Linux kernel, the following vulnerability has been resolved: Bluetooth: hci_sync:

In the Linux kernel, the following vulnerability has been resolved:

Bluetooth: hci_sync: hold conn in hci_past_sync() callback

Avoids giving freed pointers to hci_conn_valid(), which kmalloc may have
reused.

Hold refcount to avoid that.