diff --git a/src/apps/relay/ns_ioalib_engine_impl.c b/src/apps/relay/ns_ioalib_engine_impl.c
index cb7fcd6..803625c 100644
--- a/src/apps/relay/ns_ioalib_engine_impl.c
+++ b/src/apps/relay/ns_ioalib_engine_impl.c
@@ -1492,6 +1492,12 @@ void close_ioa_socket(ioa_socket_handle s) {
 
     close_socket_net_data(s);
 
+    if (s->session && s->session->client_socket == s) {
+      // Detaching client socket from super session to prevent mem corruption
+      // in case client_to_be_allocated_timeout_handler gets triggered
+      s->session->client_socket = NULL;
+    }
+
     s->session = NULL;
     s->sub_session = NULL;
     s->magic = 0;