PVS-Studio warning V611 for VirtualBox

void
ReadTSMF(uint32_t u32ChannelHandle,
         uint32_t u32HGCMClientId,
         uint32_t u32SizeAvailable)
{
  ....
  PBYTE pBuffer = (PBYTE)malloc(u32SizeAvailable + sizeof(....));
  ....
  delete [] pBuffer;
  ....
}

This suspicious code was found in VirtualBox project by PVS-Studio static code analyzer.
Warning message is:
V611 The memory was allocated using 'malloc/realloc' function but was released using the 'delete' operator. Consider inspecting operation logics behind the 'pBuffer' variable. tsmfhook.cpp 1261

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