CVE-2026-63976

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

Bluetooth: l2cap: clear chan->ident on ECRED reconfiguration success

l2capecredreconfrsp() returns early on success without clearing chan->ident. Every other L2CAP response handler (l2capecredconnrsp, l2capleconnectrsp, l2capconfig_rsp) clears chan->ident after a successful transaction to prevent the channel from matching subsequent responses with the recycled ident value.

A remote attacker that completed a reconfiguration as the peer can replay a failure response with the stale ident, causing the kernel to match and destroy the already-established channel via l2capchandel(chan, ECONNRESET).

Clear chan->ident for all matching channels on success, and harden the failure path by using l2capchanholdunlesszero() consistent with other L2CAP handlers (l2caplecommand_rej, __l2capgetchanbyident).