diff --git a/cmd/storage-rest-common.go b/cmd/storage-rest-common.go
index d8a28ae29..17bcc5f69 100644
--- a/cmd/storage-rest-common.go
+++ b/cmd/storage-rest-common.go
@@ -83,3 +83,13 @@ type nsScannerResp struct {
 	Update *dataUsageEntry `msg:"u"`
 	Final  *dataUsageCache `msg:"f"`
 }
+
+// Recycle resets the response, so that recycled responses cannot
+// leak stale scanner data into a subsequent scan.
+func (r *nsScannerResp) Recycle() {
+	if r == nil {
+		return
+	}
+	r.Update = nil
+	r.Final = nil
+}
diff --git a/cmd/storage-rest-server.go b/cmd/storage-rest-server.go
index f20e4e99f..17d274bca 100644
--- a/cmd/storage-rest-server.go
+++ b/cmd/storage-rest-server.go
@@ -290,6 +290,9 @@ func (s *storageRESTServer) NSScannerHandler(ctx context.Context, params *nsScan
 		for update := range updates {
 			resp := storageNSScannerRPC.NewResponse()
 			resp.Update = &update
+			// Pooled responses may carry fields from a previous
+			// scan, always clear the fields not being set.
+			resp.Final = nil
 			out <- resp
 		}
 	}()
@@ -301,6 +304,7 @@ func (s *storageRESTServer) NSScannerHandler(ctx context.Context, params *nsScan
 	// Send final response.
 	resp := storageNSScannerRPC.NewResponse()
 	resp.Final = &ui
+	resp.Update = nil
 	out <- resp
 	return nil
 }
diff --git a/cmd/storage-rest-server_test.go b/cmd/storage-rest-server_test.go
new file mode 100644
index 000000000..354348882
--- /dev/null
+++ b/cmd/storage-rest-server_test.go
@@ -0,0 +1,36 @@
+// Copyright (c) 2015-2023 MinIO, Inc.
+//
+// This file is part of MinIO Object Storage stack
+//
+// This program is free software: you can redistribute it and/or modify
+// it under the terms of the GNU Affero General Public License as published by
+// the Free Software Foundation, either version 3 of the License, or
+// (at your option) any later version.
+//
+// This program is distributed in the hope that it will be useful
+// but WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+// GNU Affero General Public License for more details.
+//
+// You should have received a copy of the GNU Affero General Public License
+// along with this program.  If not, see <http://www.gnu.org/licenses/>.
+
+package cmd
+
+import "testing"
+
+// TestNSScannerRespPooling verifies that recycled NSScanner stream
+// responses cannot leak stale fields from a previous scan into new
+// responses, which would otherwise produce incorrect bucket usage
+// data.
+func TestNSScannerRespPooling(t *testing.T) {
+	dirty := storageNSScannerRPC.NewResponse()
+	dirty.Update = &dataUsageEntry{}
+	dirty.Final = &dataUsageCache{}
+	storageNSScannerRPC.PutResponse(dirty)
+
+	resp := storageNSScannerRPC.NewResponse()
+	if resp.Update != nil || resp.Final != nil {
+		t.Fatalf("pooled nsScannerResp leaked stale fields: Update %v, Final %v", resp.Update, resp.Final)
+	}
+}
diff --git a/internal/grid/handlers.go b/internal/grid/handlers.go
index 1d20fa9b9..b0ca9e324 100644
--- a/internal/grid/handlers.go
+++ b/internal/grid/handlers.go
@@ -698,6 +698,11 @@ func (h *StreamTypeHandler[Payload, Req, Resp]) PutRequest(r Req) {
 // These should be returned by the caller.
 func (h *StreamTypeHandler[Payload, Req, Resp]) PutResponse(r Resp) {
 	if r != h.nilResp {
+		if rc, ok := any(r).(Recycler); ok {
+			// Recycled stream responses must not leak fields
+			// from a previous use into the next response.
+			rc.Recycle()
+		}
 		//nolint:staticcheck // SA6002 IT IS A GENERIC VALUE! (and always a pointer)
 		h.respPool.Put(r)
 	}