What are my risks and liabilities for assigning my commercial lease to my potential buyer?

You asked what your risks and liabilities were for assigning your commercial lease to a buyer (presumably of your business).  No other terms or conditions were included in your question and no other terms or conditions are assumed to be part of the question.   In California, an assignment of a lease, as opposed to a novation of a lease, leaves the assignor (in this case, you) legally responsible for all of the obligations under the lease that you had before you assigned the lease.  If your assignee (that is, the person to whom you assign your lease) does not pay the rent or the utilities or whatever other amounts are owed under the lease, you are legally responsible for paying those amounts in full.  You probably would have the right to seek to recover the amounts you pay from the assignee, but that woudl be little comfort if the assignee is broke.  Essentially, in California, an assignment of a lease gives the landlord another party who is responsible under the lease without releasing the old party.  I hope that answers your question.