Entries for share buy-back (Without Par Value)

Can anyone explain why cash is debited and common stock credited, when company issues share buy back((Without Par Value). Surely cash would be credited and CS debited? Thanks

You seem to have two opposite concepts in your question, which may be the reason for the confusion. “issues” has the connotation of selling stock, which is the first answer you have “buyback” implies a repuchase of shares and is the one with the credit to cash and debit to treasury stock (a contra account in the equity section)