Former AC Milan coach Leonardo would discuss any offer to become Brazil's new boss but insists no talks have taken place so far.
Speculation is rife that Leonardo will succeed Dunga, whose contract was not renewed following Brazil's disappointing World Cup campaign.
The 40-year-old has held only one managerial position, quitting Milan at the end of the last Serie A season after just a year in charge.
He admits it might not be the right time to take charge of Brazil but knows it would be a difficult position to turn down.
"Honestly I don't know anything," he told Sky Italia. "I have never spoken with the Federation, the only thing I know is that which comes out in the press.
"I don't know if you can say no or yes. I'm not looking for a job, I'm looking for a dream. I have decided to make myself available to everyone.
"If I had to choose my path, maybe this would not be the right time. It's been 20 years that I've been outside Brazil.
"I have decided to make myself available. If nothing happens, I will decide after that what I will do.
"I'm giving my availability because it is the first time I have spoken. I haven't spoken in Brazil because it didn't seem to me to be the right moment."
Brazil's hopes of a sixth World Cup triumph ended at the quarter-final stage in South Africa as they let slip a 1-0 half-time lead to suffer a shock 2-1 loss to Holland, who beat Uruguay tonight to reach the final.
Leonardo feels the whole system of management of the national team needs changing before the country host football's showpiece event in four years' time.
The Brazilian spent many years as a club executive and scout at Milan before taking charge at the San Siro and would prefer a role more similar to that rather than a coaching position.
He added: "I think it is a particular moment for Brazil, it was a premature elimination that was not expected by anybody.
"There are very important years ahead because Brazil will host the World Cup finals after 64 years.
"There are so many things to build, maybe certain concepts and certain values also have to be mended, to organise an event which everyone is looking forward to with great joy.
"I don't know what will happen. I think my story has confused Brazil a bit. My story was very much linked to directorship and the management aspect, which is what I like and I've always done. Then last year I was on the bench and this confused me a bit too.
"The bench is a very dangerous virus. Milan gave me the unique opportunity to do both things. There are many good coaches who could coach Brazil."
Leonardo had moderate success at Milan, leading the team into next season's Champions League with a third-place finish in Serie A but the side did not win any trophies.
They were knocked out of the Coppa Italia by Udinese earlier this year and suffered a heavy defeat at the hands of Manchester United in the Champions League.
Leonardo earned 60 caps for Brazil, helping them to the World Cup trophy in 1994 and the final four years later where they lost out to hosts France.