CVE-2026-81039 Bluetooth Host connection reservation leak when multiple connectable advertising sets share an identity

The Bluetooth host pre-allocates a btconn object a "reservation" from the fixed aclconns pool for every connectable advertising set it starts, in leadvstartaddconn in subsys/bluetooth/host/adv.c. When an incoming peripheral connection completes, findpendingconnect in subsys/bluetooth/host/hcicore...