In general, for any form of stack dump, call Microsoft Customer Support and open a case.
This however looks like database corruption. Error 5242 is:
An inconsistency was detected during an internal operation in database '%.*ls'(ID:%d) on page %S_PGID. Please contact technical support.
Please run the following and post the full and complete results.
DBCC CHECKDB (<Database Name>) WITH NO_INFOMSGS, ALL_ERRORMSGS
Gail Shaw
Microsoft Certified Master: SQL Server, MVP, M.Sc (Comp Sci)
SQL In The Wild: Discussions on DB performance with occasional diversions into recoverability