diff --git a/modules/virt-zstream-4-21-1.adoc b/modules/virt-zstream-4-21-1.adoc
new file mode 100644
index 000000000000..c4317db84320
--- /dev/null
+++ b/modules/virt-zstream-4-21-1.adoc
@@ -0,0 +1,37 @@
+// Module included in the following assemblies:
+//
+// * virt/release_notes/virt-4-21-release-notes.adoc
+
+:_mod-docs-content-type: REFERENCE
+[id="virt-zstream-4-21-1_{context}"]
+= {VirtProductName} 4.21.1 updates
+
+[role="_abstract"]
+{VirtProductName} {product-version}.1 is now available with updates to packages and images that fix several bugs and add enhancements.
+
+[id="virt-4-21-1-new_{context}"]
+== New features and enhancements
+
+// Example release note format:
+//
+// Improved lorem installation workflow for clusters::
+// Lorem ipsum dolor sit amet, consectetur adipiscing elit. As a result, lorem updates complete more predictably on large clusters.
+// +
+// link:https://issues.redhat.com/browse/CNV-00001[CNV-00001]
+
+{gcp-first} is generally available::
+Using {VirtProductName} on a {gcp-full} cluster with bare-metal nodes is now generally available. For more information, see xref:../../virt/install/preparing-cluster-for-virt.adoc#compatible-platforms_preparing-cluster-for-virt[Compatible platforms].
++
+[NOTE]
+====
+Resizing an attached Hyperdisk volume is not supported in RWX mode. For more information, see link:https://docs.cloud.google.com/compute/docs/disks/modify-hyperdisks?utm_source=chatgpt.com#capacity_changes[Increase the capacity of a Hyperdisk volume] in the {gcp-short} documentation.
+====
+//+
+//can't seem to find a relevant public Jira link
+//TODO: add link to kbase article re: GC and storage limitations when updated
+
+//[id="virt-4-21-1-fixed-issues_{context}"]
+//== Fixed issues
+
+//[id="virt-4-21-1-known-issues_{context}"]
+//== Known issues
\ No newline at end of file
diff --git a/virt/release_notes/virt-4-21-release-notes.adoc b/virt/release_notes/virt-4-21-release-notes.adoc
index bfa2060e124c..7eaa7f37da07 100644
--- a/virt/release_notes/virt-4-21-release-notes.adoc
+++ b/virt/release_notes/virt-4-21-release-notes.adoc
@@ -297,3 +297,8 @@ To work around this problem, manually delete the stale boot source resources:
 . Delete the older, non-suffixed `DataSource` objects and the PVCs or `VolumeSnapshots` they reference.
 +
 link:https://issues.redhat.com/browse/CNV-75084[CNV-75084]
+
+[id="virt-maintenance-releases_{context}"]
+== Maintenance releases
+
+include::modules/virt-zstream-4-21-1.adoc[leveloffset=+2]