CVE-2021-45117: The OPC autogenerated ANSI C stack stubs (in the NodeSets) do not handle all error cases. This can lead to a NULL pointe

CVE-2021-45117 is a vulnerability in OPC (OLE for Process Control, a standard for industrial automation communication) autogenerated ANSI C code where error handling is incomplete, allowing a NULL pointer dereference (an error where code tries to access memory that doesn't exist). This bug affects software that uses OPC NodeSets (configuration files that define data structures).