v25.4.2 release notes (#21622)

Author: mikeCRL

src/current/_data/releases.yml

@@ -10041,6 +10041,41 @@
   previous_release: v26.1.0-alpha.1
 
 
+- release_name: v25.4.2
+  major_version: v25.4
+  release_date: '2025-12-12'
+  release_type: Production
+  go_version: go1.25.3
+  sha: fed2b8351ac420fec6a1eecce0c78e3848d11896
+  has_sql_only: true
+  has_sha256sum: true
+  mac:
+    mac_arm: true
+    mac_arm_experimental: true
+    mac_arm_limited_access: false
+  windows: true
+  linux:
+    linux_arm: true
+    linux_arm_experimental: false
+    linux_arm_limited_access: false
+    linux_intel_fips: true
+    linux_arm_fips: false
+  docker:
+    docker_image: cockroachdb/cockroach
+    docker_arm: true
+    docker_arm_experimental: false
+    docker_arm_limited_access: false
+  source: true
+  previous_release: v25.4.1
+  cloud_only: true
+  cloud_only_message_short: 'Available only for select CockroachDB Cloud clusters'
+  cloud_only_message: >
+      This version is currently available only for select
+      CockroachDB Cloud clusters. To request to upgrade
+      a CockroachDB self-hosted cluster to this version,
+      [contact support](https://support.cockroachlabs.com/hc/requests/new).
+
+
 - release_name: v25.3.6
   major_version: v25.3
   release_date: '2025-12-12'

src/current/_includes/releases/v25.4/v25.4.2.md

@@ -0,0 +1,24 @@
+## v25.4.2
+
+Release Date: December 12, 2025
+
+{% include releases/new-release-downloads-docker-image.md release=include.release %}
+
+<h3 id="v25-4-2-db-console-changes">DB Console changes</h3>
+
+- The background (elastic) store graphs for exhausted duration, and the wait duration histogram, have been separated from the foreground (regular) graphs. [#156869][#156869]
+
+<h3 id="v25-4-2-bug-fixes">Bug fixes</h3>
+
+- A mechanism that prevents unsafe replication changes from causing loss of quorum now functions correctly. An internal function has been fixed to properly return errors, enhancing the reliability of replication safeguards. [#156523][#156523]
+- Fixed a bug where CockroachDB could encounter a `vector encoder doesn't support ForcePut yet` error when executing `COPY` commands concurrently with certain schema changes. The bug had existed since before v23.2. [#157200][#157200]
+- Fixed a bug that could cause a schema change to be stuck in the reverting state if the `infer_rbr_region_col_using_constraint` storage parameter was being set at the same time as adding a constraint that had a foreign key violation. [#157844][#157844]
+
+[#156523]: https://github.com/cockroachdb/cockroach/pull/156523
+[#156869]: https://github.com/cockroachdb/cockroach/pull/156869
+[#157011]: https://github.com/cockroachdb/cockroach/pull/157011
+[#157200]: https://github.com/cockroachdb/cockroach/pull/157200
+[#157228]: https://github.com/cockroachdb/cockroach/pull/157228
+[#157844]: https://github.com/cockroachdb/cockroach/pull/157844
+[#157853]: https://github.com/cockroachdb/cockroach/pull/157853
+[#159122]: https://github.com/cockroachdb/cockroach/pull/159122