During Oracle Database installation, by default Oracle Universal Installer installs software in the ORACLE_HOME directory. Oracle Universal Installer sets the permissions for this directory, and for all files and directories under this directory.
For the ORACLE_HOME of Oracle Grid Infrastructure, OUI grants the following permissions to the groups and users:
Full control - Administrators, SYSTEM, ORA_GRID_LISTENERS, Oracle Installation User, Oracle Home User
Read, Execute, and List Contents - Authenticated Users