diff --git a/common/listener/listener.go b/common/listener/listener.go
index 7d49d664..cc27a62e 100644
--- a/common/listener/listener.go
+++ b/common/listener/listener.go
@@ -151,6 +151,7 @@ func ListenNetworkNamespace[T any](nameOrPath string, block func() (T, error)) (
 		if err != nil {
 			return common.DefaultValue[T](), E.Cause(err, "get current netns")
 		}
+		defer currentNs.Close()
 		defer netns.Set(currentNs)
 		var targetNs netns.NsHandle
 		if strings.HasPrefix(nameOrPath, "/") {