CVE-2026-11368 Use-after-free in Bluetooth host ATT TX completion on disconnect mid-transfer

The Bluetooth host ATT layer subsys/bluetooth/host/att.c associates each in-flight ATT TX buffer with its owning channel via the static txmetadatastorage array data-attchan = chan. When a buffer's last reference is dropped, its net-buf destroy callback defers the completion handling to the system...