Its something to look out for. However most of the major banks are very well capitalized. For example Goldman sachs has a balance sheet of more than 1trillion. With fed rates near zero the CLO will keep on rising as yields junkies search for higher yields. A company like Boeing would have needed government bailout if it wasn't for financial instruments like CLO.
Back in Kenya, we need such instruments like CLO to package all the non performing loans or a vulture funds to buy those loans and try to recover debt.