CVE-2026-90169

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

ksmbd: free preauth sessions on connection teardown

SMB3.1.1 multichannel binding preserves the preauthentication hash in a

preauth_session between the NTLM negotiate and authenticate requests.

The binding NTLM negotiate allocates this object and returns

STATUS_MORE_PROCESSING_REQUIRED. If the client disconnects before it sends

the authenticate request, neither the authenticate nor error cleanup paths

free the object.

Release any remaining preauthentication sessions when tearing down the

connection. Initialize the list when allocating the connection so that this

cleanup is safe regardless of the negotiated dialect.