OSDOCS-16561: 4.17.42 z-stream RN

Author: tmalove

release_notes/ocp-4-17-release-notes.adoc

@@ -2928,6 +2928,34 @@ This section will continue to be updated over time to provide notes on enhanceme
 For any {product-title} release, always review the instructions on xref:../updating/updating_a_cluster/updating-cluster-web-console.adoc#updating-cluster-web-console[updating your cluster] properly.
 ====
 
+// 4.17.42
+[id="ocp-4-17-42_{context}"]
+=== RHBA-2025:18235 - {product-title} {product-version}.42 bug fix update and security
+
+Issued: 22 October 2025
+
+{product-title} release {product-version}.42 is now available. The list of bug fixes that are included in the update is documented in the link:https://access.redhat.com/errata/RHBA-2025:18235[RHBA-2025:18235] advisory. There are no RPM packages for this release.
+
+Space precluded documenting all of the container images for this release in the advisory.
+
+You can view the container images in this release by running the following command:
+
+[source,terminal]
+----
+$ oc adm release info 4.17.42 --pullspecs
+----
+
+[id="ocp-4-17-42-bug-fixes_{context}"]
+==== Bug fixes
+
+* Before this update, multiple mirrors in the {hcp} payload caused image lookup failures, and led to {hcp} creation failures when multiple mirror images were handled. With this release, the {hcp} payload supports multiple mirrors, correctly handles unavailable mirrors, and results in a successful cluster creation. (link:https://issues.redhat.com/browse/OCPBUGS-57143[OCPBUGS-57143])
+
+* Before this update, a fixed upstream issue in {product-title} version 4.17 was not reproducible and was triggered by consuming the issue for downstream. This led to data inconsistency for users. With this release, the upstream issue in the `external-resizer` mechanism is fixed, and reduces potential consumption for downstream. As a result, users do not experience the issue in {product-title} version 4.17. (link:https://issues.redhat.com/browse/OCPBUGS-62466[OCPBUGS-62466])
+
+[id="ocp-4-17-42-updating_{context}"]
+==== Updating
+To update an {product-title} 4.17 cluster to this latest release, see xref:../updating/updating_a_cluster/updating-cluster-cli.adoc#updating-cluster-cli[Updating a cluster using the CLI].
+
 // 4.17.41
 [id="ocp-4-17-41_{context}"]
 === RHSA-2025:17232 - {product-title} {product-version}.41 bug fix update and security