diff --git a/stack_mixed.go b/stack_mixed.go
index 6518cd0..8836d6b 100644
--- a/stack_mixed.go
+++ b/stack_mixed.go
@@ -184,6 +184,7 @@ func (m *Mixed) batchLoopDarwin(darwinTUN DarwinTUN) {
 		for _, buffer := range buffers {
 			packetSize := buffer.Len()
 			if packetSize < header.IPv4MinimumSize {
+				buffer.Release()
 				continue
 			}
 			if m.processPacket(buffer.Bytes()) {
@@ -197,6 +198,7 @@ func (m *Mixed) batchLoopDarwin(darwinTUN DarwinTUN) {
 			if err != nil {
 				m.logger.Trace(E.Cause(err, "batch write packet"))
 			}
+			buf.ReleaseMulti(writeBuffers)
 		}
 	}
 }
diff --git a/stack_system.go b/stack_system.go
index e2cdd45..ef8b709 100644
--- a/stack_system.go
+++ b/stack_system.go
@@ -281,6 +281,7 @@ func (s *System) batchLoopDarwin(darwinTUN DarwinTUN) {
 		for _, buffer := range buffers {
 			packetSize := buffer.Len()
 			if packetSize < header.IPv4MinimumSize {
+				buffer.Release()
 				continue
 			}
 			if s.processPacket(buffer.Bytes()) {
@@ -294,6 +295,7 @@ func (s *System) batchLoopDarwin(darwinTUN DarwinTUN) {
 			if err != nil {
 				s.logger.Trace(E.Cause(err, "batch write packet"))
 			}
+			buf.ReleaseMulti(writeBuffers)
 		}
 	}
 }