CVE-2026-98462

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

Bluetooth: hci conn: fix CIS hold ownership on reuse

Commit 69997d50ec57 ("Bluetooth: ISO: handle bound CIS cleanup via hci conn") made hci bind cis() and hci connect cis() return a connection with one hold for the ISO layer. hci bind cis() currently takes that hold only after configuring a CIS, so its BT CONNECTED and matching BT BOUND paths return a bare lookup result. Its configuration failure path can likewise call hci conn drop() before taking a hold.

Take the hold before any state-dependent return or configuration error so every successful return follows the documented ownership contract and every error drop is balanced.

hci connect cis() also assumes hci conn link() always takes a new CIS hold before dropping the one returned by hci bind cis(). However, the helper returns an existing link without taking another hold. In that case, preserve the CIS hold for the caller and drop the redundant LE hold because the existing link already owns its parent hold. Returning early also avoids changing an existing CIS back to BT CONNECT.