reverted:
--- b/core/modules/update/css/update.admin.theme.css
+++ a/core/modules/update/css/update.admin.theme.css
@@ -61,26 +61,3 @@
 .project-update__version--recommended-strong .project-update__version-title {
   font-weight: bold;
 }
-
-.project-update__compatibility-details details {
-  height: 20px;
-  margin: 0;
-  border: 0;
-  background-color: inherit;
-}
-.project-update__compatibility-details details[open] {
-  overflow: visible;
-  height: auto;
-  white-space: normal;
-}
-.project-update__compatibility-details summary {
-  border: 0;
-  margin: 0;
-  padding: 0;
-  text-transform: none;
-  font-weight: normal;
-}
-.project-update__compatibility-details .details-wrapper {
-  margin: 0;
-  padding: 5px 0;
-}
diff -u b/core/modules/update/tests/modules/update_test/aaa_update_test.core_compatibility.8.x-1.2_8.x-2.2.xml b/core/modules/update/tests/modules/update_test/aaa_update_test.sec.8.x-1.2_8.x-2.2.xml
--- b/core/modules/update/tests/modules/update_test/aaa_update_test.core_compatibility.8.x-1.2_8.x-2.2.xml
+++ b/core/modules/update/tests/modules/update_test/aaa_update_test.sec.8.x-1.2_8.x-2.2.xml
@@ -30,7 +30,6 @@
    <name>aaa_update_test 8.x-3.0-beta1</name>
    <version>8.x-3.0-beta1</version>
    <tag>8.x-3.0-beta1</tag>
-   <core_compatibility>^8.1.1</core_compatibility>
    <status>published</status>
    <release_link>http://example.com/aaa_update_test-8-x-3-0-beta1</release_link>
    <download_link>http://example.com/aaa_update_test--8-x-3-0-beta1.tar.gz</download_link>
@@ -47,8 +46,7 @@
   <release>
    <name>aaa_update_test 8.x-2.2</name>
    <version>8.x-2.2</version>
-   <tag>8.x-2.2</tag>
-   <core_compatibility>^8.1.1</core_compatibility>
+   <tag>DRUPAL-8--2-2</tag>
    <status>published</status>
    <release_link>http://example.com/aaa_update_test-8-x-2-2-release</release_link>
    <download_link>http://example.com/aaa_update_test-8-x-2-2.tar.gz</download_link>
@@ -62,7 +60,7 @@
   <release>
    <name>aaa_update_test 8.x-2.1</name>
    <version>8.x-2.1</version>
-   <tag>8.x-2.2</tag>
+   <tag>DRUPAL-8--2-1</tag>
    <status>published</status>
    <release_link>http://example.com/aaa_update_test-8-x-2-1-release</release_link>
    <download_link>http://example.com/aaa_update_test-8-x-2-1.tar.gz</download_link>
@@ -77,7 +75,7 @@
   <release>
    <name>aaa_update_test 8.x-2.0</name>
    <version>8.x-2.0</version>
-   <tag>8.x-2.2</tag>
+   <tag>DRUPAL-8--2-0</tag>
    <status>published</status>
    <release_link>http://example.com/aaa_update_test-8-x-2-0-release</release_link>
    <download_link>http://example.com/aaa_update_test-8-x-2-0.tar.gz</download_link>
@@ -91,8 +89,7 @@
   <release>
    <name>aaa_update_test 8.x-1.2</name>
    <version>8.x-1.2</version>
-   <tag>8.x-2.2</tag>
-   <core_compatibility>^8.1.0</core_compatibility>
+   <tag>DRUPAL-8--1-2</tag>
    <status>published</status>
    <release_link>http://example.com/aaa_update_test-8-x-1-2-release</release_link>
    <download_link>http://example.com/aaa_update_test-8-x-1-2.tar.gz</download_link>
@@ -106,7 +103,7 @@
   <release>
    <name>aaa_update_test 8.x-1.1</name>
    <version>8.x-1.1</version>
-   <tag>8.x-2.2</tag>
+   <tag>DRUPAL-8--1-1</tag>
    <status>published</status>
    <release_link>http://example.com/aaa_update_test-8-x-1-1-release</release_link>
    <download_link>http://example.com/aaa_update_test-8-x-1-1.tar.gz</download_link>
@@ -120,7 +117,7 @@
   <release>
    <name>aaa_update_test 8.x-1.0</name>
    <version>8.x-1.0</version>
-   <tag>8.x-2.2</tag>
+   <tag>DRUPAL-8--1-0</tag>
    <status>published</status>
    <release_link>http://example.com/aaa_update_test-8-x-1-0-release</release_link>
    <download_link>http://example.com/aaa_update_test-8-x-1-0.tar.gz</download_link>
reverted:
--- b/core/themes/stable/css/update/update.admin.theme.css
+++ a/core/themes/stable/css/update/update.admin.theme.css
@@ -61,26 +61,3 @@
 .project-update__version--recommended-strong .project-update__version-title {
   font-weight: bold;
 }
-
-.project-update__compatibility-details details {
-  height: 20px;
-  margin: 0;
-  border: 0;
-  background-color: inherit;
-}
-.project-update__compatibility-details details[open] {
-  overflow: visible;
-  height: auto;
-  white-space: normal;
-}
-.project-update__compatibility-details summary {
-  border: 0;
-  margin: 0;
-  padding: 0;
-  text-transform: none;
-  font-weight: normal;
-}
-.project-update__compatibility-details .details-wrapper {
-  margin: 0;
-  padding: 5px 0;
-}
only in patch2:
unchanged:
--- /dev/null
+++ b/core/modules/update/tests/modules/update_test/aaa_update_test.core_compatibility.8.x-1.2_8.x-2.2.xml
@@ -0,0 +1,135 @@
+<?xml version="1.0" encoding="utf-8"?>
+<project xmlns:dc="http://purl.org/dc/elements/1.1/">
+ <title>AAA Update test</title>
+ <short_name>aaa_update_test</short_name>
+ <dc:creator>Drupal</dc:creator>
+ <supported_branches>8.x-1.,8.x-2.</supported_branches>
+ <project_status>published</project_status>
+ <link>http://example.com/project/aaa_update_test</link>
+ <terms>
+  <term><name>Projects</name><value>Modules</value></term>
+ </terms>
+ <releases>
+  <release>
+   <name>aaa_update_test 8.x-3.0-beta2</name>
+   <version>8.x-3.0-beta2</version>
+   <tag>8.x-3.0-beta2</tag>
+   <status>published</status>
+   <release_link>http://example.com/aaa_update_test-8-x-3-0-beta2-release</release_link>
+   <download_link>http://example.com/aaa_update_test-8-x-3-0-beta2.tar.gz</download_link>
+   <date>1533298080</date>
+   <terms>
+    <term><name>Release type</name><value>Bug fixes</value></term>
+    <term><name>Release type</name><value>New features</value></term>
+   </terms>
+   <security>
+    Beta releases are not covered by Drupal security advisories.
+   </security>
+  </release>
+  <release>
+   <name>aaa_update_test 8.x-3.0-beta1</name>
+   <version>8.x-3.0-beta1</version>
+   <tag>8.x-3.0-beta1</tag>
+   <core_compatibility>^8.1.1</core_compatibility>
+   <status>published</status>
+   <release_link>http://example.com/aaa_update_test-8-x-3-0-beta1</release_link>
+   <download_link>http://example.com/aaa_update_test--8-x-3-0-beta1.tar.gz</download_link>
+   <date>1533270485</date>
+   <terms>
+    <term><name>Release type</name><value>Insecure</value></term>
+    <term><name>Release type</name><value>Bug fixes</value></term>
+    <term><name>Release type</name><value>New features</value></term>
+   </terms>
+   <security>
+    Beta releases are not covered by Drupal security advisories.
+   </security>
+  </release>
+  <release>
+   <name>aaa_update_test 8.x-2.2</name>
+   <version>8.x-2.2</version>
+   <tag>8.x-2.2</tag>
+   <core_compatibility>^8.1.1</core_compatibility>
+   <status>published</status>
+   <release_link>http://example.com/aaa_update_test-8-x-2-2-release</release_link>
+   <download_link>http://example.com/aaa_update_test-8-x-2-2.tar.gz</download_link>
+   <date>1250424521</date>
+   <terms>
+    <term><name>Release type</name><value>New features</value></term>
+    <term><name>Release type</name><value>Bug fixes</value></term>
+    <term><name>Release type</name><value>Security update</value></term>
+   </terms>
+  </release>
+  <release>
+   <name>aaa_update_test 8.x-2.1</name>
+   <version>8.x-2.1</version>
+   <tag>8.x-2.2</tag>
+   <status>published</status>
+   <release_link>http://example.com/aaa_update_test-8-x-2-1-release</release_link>
+   <download_link>http://example.com/aaa_update_test-8-x-2-1.tar.gz</download_link>
+   <date>1250424521</date>
+   <terms>
+    <term><name>Release type</name><value>New features</value></term>
+    <term><name>Release type</name><value>Bug fixes</value></term>
+    <term><name>Release type</name><value>Security update</value></term>
+    <term><name>Release type</name><value>Insecure</value></term>
+   </terms>
+  </release>
+  <release>
+   <name>aaa_update_test 8.x-2.0</name>
+   <version>8.x-2.0</version>
+   <tag>8.x-2.2</tag>
+   <status>published</status>
+   <release_link>http://example.com/aaa_update_test-8-x-2-0-release</release_link>
+   <download_link>http://example.com/aaa_update_test-8-x-2-0.tar.gz</download_link>
+   <date>1250424521</date>
+   <terms>
+    <term><name>Release type</name><value>New features</value></term>
+    <term><name>Release type</name><value>Bug fixes</value></term>
+    <term><name>Release type</name><value>Insecure</value></term>
+   </terms>
+  </release>
+  <release>
+   <name>aaa_update_test 8.x-1.2</name>
+   <version>8.x-1.2</version>
+   <tag>8.x-2.2</tag>
+   <core_compatibility>^8.1.0</core_compatibility>
+   <status>published</status>
+   <release_link>http://example.com/aaa_update_test-8-x-1-2-release</release_link>
+   <download_link>http://example.com/aaa_update_test-8-x-1-2.tar.gz</download_link>
+   <date>1250424521</date>
+   <terms>
+    <term><name>Release type</name><value>New features</value></term>
+    <term><name>Release type</name><value>Bug fixes</value></term>
+    <term><name>Release type</name><value>Security update</value></term>
+   </terms>
+  </release>
+  <release>
+   <name>aaa_update_test 8.x-1.1</name>
+   <version>8.x-1.1</version>
+   <tag>8.x-2.2</tag>
+   <status>published</status>
+   <release_link>http://example.com/aaa_update_test-8-x-1-1-release</release_link>
+   <download_link>http://example.com/aaa_update_test-8-x-1-1.tar.gz</download_link>
+   <date>1250424521</date>
+   <terms>
+    <term><name>Release type</name><value>New features</value></term>
+    <term><name>Release type</name><value>Bug fixes</value></term>
+    <term><name>Release type</name><value>Insecure</value></term>
+   </terms>
+  </release>
+  <release>
+   <name>aaa_update_test 8.x-1.0</name>
+   <version>8.x-1.0</version>
+   <tag>8.x-2.2</tag>
+   <status>published</status>
+   <release_link>http://example.com/aaa_update_test-8-x-1-0-release</release_link>
+   <download_link>http://example.com/aaa_update_test-8-x-1-0.tar.gz</download_link>
+   <date>1250424521</date>
+   <terms>
+    <term><name>Release type</name><value>New features</value></term>
+    <term><name>Release type</name><value>Bug fixes</value></term>
+    <term><name>Release type</name><value>Insecure</value></term>
+   </terms>
+  </release>
+ </releases>
+</project>
only in patch2:
unchanged:
--- /dev/null
+++ b/core/themes/seven/css/theme/update-report.css
@@ -0,0 +1,28 @@
+/**
+ * @file update-report.css
+ *
+ * Styling for the Available updates report at admin/reports/updates
+ */
+
+.project-update__compatibility-details details {
+  height: 20px;
+  margin: 2px 0;
+  border: 0;
+  background-color: inherit;
+}
+.project-update__compatibility-details details[open] {
+  overflow: visible;
+  height: auto;
+  white-space: normal;
+}
+.project-update__compatibility-details summary {
+  border: 0;
+  margin: 0;
+  padding: 0;
+  text-transform: none;
+  font-weight: normal;
+}
+.project-update__compatibility-details .details-wrapper {
+  margin: 0;
+  padding: 5px 0;
+}
only in patch2:
unchanged:
--- a/core/themes/seven/seven.libraries.yml
+++ b/core/themes/seven/seven.libraries.yml
@@ -61,6 +61,12 @@ maintenance-page:
     - system/maintenance
     - seven/global-styling
 
+update-report:
+  version: VERSION
+  css:
+    theme:
+      css/theme/update-report.css: {}
+
 install-page:
   version: VERSION
   js:
only in patch2:
unchanged:
--- a/core/themes/seven/seven.theme
+++ b/core/themes/seven/seven.theme
@@ -374,3 +374,16 @@ function seven_views_pre_render(ViewExecutable $view) {
     }
   }
 }
+
+/**
+ * Prepares variables for update version templates.
+ *
+ * Default template: update-version.html.twig.
+ *
+ * @param array $variables
+ *   An associative array containing:
+ *   - version: An array of information about the release version.
+ */
+function seven_preprocess_update_version(array &$variables) {
+  $variables['#attached']['library'][] =  'seven/update-report';
+}