CVE-2026-31539

Description

In the Linux kernel, the following vulnerability has been resolved: smb: smbdirect: introduce smbdirect_socket.recv_io.credits.available The logic off managing recv credits by counting posted recv_io and granted credits is racy. Thats because the peer might already consumed a credit, but between receiving the incoming recv at the hardware and processing the completion in the recv_done functions we likely have a window where we grant credits, which dont really exist. So we better have a decicated counter for the available credits, which will be incremented when we posted new recv buffers and drained when we grant the credits to the peer.