why JVM is using high CPU utilization on Oracle Server 10.2.0.4

  We are getting high CPU utilization with 1 of the JVMs, the highest Top 5 timed waite events

Event	Waits	Time(s)	Avg Wait(ms)	% Total Call Time	Wait Class
latch free	773,818	6,944,503	8,974	58.2	Other

i was reviewing the latch free waits possible causes and it could be a cuased by not using bind variables

also any of the high cPU querys is

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SELECT /*+ first_rows */ COUNT (1) FROM CMN_SEC_CHK_USER_INST_V0 WHERE USER_ID = :B4 AND OBJECT_ID = :B3 AND PERMISSION_CODE = :B2 AND OBJECT_INSTANCE_ID = :B1 AND ROWNUM = 1

Any idea that it could help me to figure out the main issue