CVE-2026-98456

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

Bluetooth: mgmt: fix race in read_unconf_index_list()

read_unconf_index_list() counts unconfigured controllers before allocating

its response, then checks the device flags again while filling it.

hci_dev_list_lock stabilizes list membership, but it does not serialize the

per-device flags. During asynchronous controller setup, the worker can set

HCI_UNCONFIGURED and clear HCI_SETUP between the two passes. A controller

omitted from the allocation count can then become eligible for the fill

pass, causing an out-of-bounds write to rp->index[].

Allocate space for every device on hci_dev_list. Since list membership

cannot change while hci_dev_list_lock is held, the response remains large

enough regardless of flag transitions. The reported count and response

length still include only eligible unconfigured controllers.