linux ora-12570,ODP.net managed driver throws ORA-12570: Network S

In one of our products we retrieve data from the Oracle database using stored procedures using the ODP.net managed driver.

Every now and then (roughly every 1000 queries) we get the following exception:

(ORA-12570: Network Session: Unexpected packet read error)

---> Oracle.ManagedDataAccess.Client.OracleException: ORA-12570: Network Session: Unexpected packet read error

---> OracleInternal.Network.NetworkException: ORA-12570: Network Session: Unexpected packet read error

---> System.ArgumentOutOfRangeException: Specified argument was out of the range of valid values.

Parameter name: size

at System.Net.Sockets.Socket.Receive(Byte[] buffer, Int32 offset, Int32 size, SocketFlags socketFlags, SocketError& errorCode)

at OracleInternal.Network.ReaderStream.ReadIt(OraBuf OB, Int32 len)

--- End of inner exception stack trace ---

at OracleInternal.Network.ReaderStream.ReadIt(OraBuf OB, Int32 len)

at OracleInternal.Network.ReaderStream.WaitForReset()

at OracleInternal.Network.OracleCommunication.Reset()

at OracleInternal.TTC.TTCExecuteSql.ReceiveExecuteResponse(Accessor[]& defineAccessors, Accessor[] bindAccessors, Boolean bHasReturningParams, SQLMetaData& sqlMetaData, SqlStatementType statementType, Int64 noOfRowsFetchedLastTime, Int32 noOfRowsToFetch, Int32& noOfRowsFetched, Int64& queryId, Int32 longFetchSize, Int32 initialLOBFetchSize, Int64[] scnFromExecution, Boolean& bAllPureInputBinds, DataUnmarshaller& dataUnmarshaller, MarshalBindParameterValueHelper& marshalBindParamsHelper, Boolean bDefineDone, Boolean& bMoreThanOneRowAffectedByDmlWithRetClause)

--- End of inner exception stack trace ---

at Oracle.ManagedDataAccess.Client.OracleException.HandleError(OracleTraceLevel level, OracleTraceTag tag, Exception ex)

at OracleInternal.TTC.TTCExecuteSql.ReceiveExecuteResponse(Accessor[]& defineAccessors, Accessor[] bindAccessors, Boolean bHasReturningParams, SQLMetaData& sqlMetaData, SqlStatementType statementType, Int64 noOfRowsFetchedLastTime, Int32 noOfRowsToFetch, Int32& noOfRowsFetched, Int64& queryId, Int32 longFetchSize, Int32 initialLOBFetchSize, Int64[] scnFromExecution, Boolean& bAllPureInputBinds, DataUnmarshaller& dataUnmarshaller, MarshalBindParameterValueHelper& marshalBindParamsHelper, Boolean bDefineDone, Boolean& bMoreThanOneRowAffectedByDmlWithRetClause)

at OracleInternal.ServiceObjects.OracleCommandImpl.ExecuteNonQuery(String commandText, OracleParameterCollection paramColl, CommandType commandType, OracleConnectionImpl connectionImpl, Int32 longFetchSize, Int32 lobPrefetchSize, OracleDependencyImpl orclDependencyImpl, Int64[]& scnFromExecution, OracleParameterCollection& bindByPositionParamColl, Boolean& bBindParamPresent, Boolean isFromEF)

at Oracle.ManagedDataAccess.Client.OracleCommand.ExecuteNonQuery()

It seems like ODP.net is calling System.Net.Sockets.Socket.Receive with an invalid size parameter (<=0 or greater than the length of buffer minus the value of the offset parameter).

The exception cannot be reproduced manually and is never raised while executing different procedures with different parameters (ie it's random).

Configuration:

ODP.net managed driver version: 4.121.1.0

.net framework 4.5

Oracle server version: Oracle Database 11g Enterprise Edition Release 11.2.0.4.0 (Linux)

Has anyone already experienced this issue? Are there any fixes available?

Thanks in advance!