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What happened to my SQL Server

I view the SQL Server Event Log and find following infomation Error: 17805, Severity: 20, State: 3
Invalid buffer received from client..
what’s wrong with my SQL Server? Help!
What is the service pack level on SQL Server? The error 17805 is the primary condition to encounter an ODS error when processing an attention signal and this error has only been observed when using the TCP/IP network library, switching to another network library may also reduce the possibility of encountering this problem. Also check in error log whether any stack dump is created. Satya SKJ
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What are the impact of above error ie (Error 17805,Severity 20,State 3), is there any possible impacts on the server because of this?
check these KB: