processadmin
Members of the processadmin fixed server role can terminate processes that are running in an instance of SQL Server.
See Also
Reference
Concepts
Permissions of Fixed Server Roles
Other Resources
sp_helpsrvrole (Transact-SQL)
sp_helpsrvrolemember (Transact-SQL)
sp_srvrolepermission (Transact-SQL)
Security Considerations for Databases and Database Applications