diff --git a/CHANGELOG.md b/CHANGELOG.md
index 455e13ce5bb..685fb6ec24e 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -2,6 +2,10 @@
 
 ## master / unreleased
 
+## 1.15.3 2023-06-22
+
+* [BUGFIX] Distributor: Fix potential data corruption in cases of timeout between distributors and ingesters. #5422
+
 ## 1.15.2 2023-05-09
 
 * [ENHANCEMENT] Update Go version to 1.20.4. #5299
diff --git a/VERSION b/VERSION
index 42cf0675c56..f2380cc7aef 100644
--- a/VERSION
+++ b/VERSION
@@ -1 +1 @@
-1.15.2
+1.15.3
diff --git a/pkg/distributor/distributor.go b/pkg/distributor/distributor.go
index 92698d5009e..abdb382db88 100644
--- a/pkg/distributor/distributor.go
+++ b/pkg/distributor/distributor.go
@@ -843,7 +843,12 @@ func (d *Distributor) send(ctx context.Context, ingester ring.InstanceDesc, time
 	req.Source = source
 
 	_, err = c.PushPreAlloc(ctx, req)
-	cortexpb.ReuseWriteRequest(req)
+
+	// We should not reuse the req in case of errors:
+	// See: https://github.com/grpc/grpc-go/issues/6355
+	if err == nil {
+		cortexpb.ReuseWriteRequest(req)
+	}
 
 	if len(metadata) > 0 {
 		d.ingesterAppends.WithLabelValues(ingester.Addr, typeMetadata).Inc()