Detection of alteration of storage keys used to protect memory

A computer program product for facilitating processing within a computing environment, the computer program product comprising:

• a computer readable storage medium readable by a processing circuit and storing instructions for performing a method comprising:
• determining whether a storage key alteration event has occurred within a processor of the computing environment, the determining comprising checking whether one or more selected fields of a storage key have been updated without an access exception, the storage key being associated with a block of memory and controlling access to the block of memory, wherein the storage key alteration event has occurred based on the checking indicating that the one or more selected fields of the storage key have been updated without an access exception;
• and
• providing notification of the storage key alteration event, based on determining the storage key alteration event has occurred.