In the Linux kernel, the following vulnerability has been resolved: sunrpc: clear XPRTSOCKUPDTIMEOUT when reset transport Since transport->sock has been set to NULL during reset transport, XPRTSOCKUPDTIMEOUT also needs to be cleared. Otherwise, the xstcpsetsockettimeouts() may be triggered in xstcpsend_request() to dereference the transport->sock that has been set to NULL.