diff --git a/.buildkite/pipelines/periodic-packaging.yml b/.buildkite/pipelines/periodic-packaging.yml
index a49e48617648..c1b10a46c62a 100644
--- a/.buildkite/pipelines/periodic-packaging.yml
+++ b/.buildkite/pipelines/periodic-packaging.yml
@@ -273,8 +273,8 @@ steps:
         env:
           BWC_VERSION: 8.14.3
 
-      - label: "{{matrix.image}} / 8.15.4 / packaging-tests-upgrade"
-        command: ./.ci/scripts/packaging-test.sh -Dbwc.checkout.align=true destructiveDistroUpgradeTest.v8.15.4
+      - label: "{{matrix.image}} / 8.15.6 / packaging-tests-upgrade"
+        command: ./.ci/scripts/packaging-test.sh -Dbwc.checkout.align=true destructiveDistroUpgradeTest.v8.15.6
         timeout_in_minutes: 300
         matrix:
           setup:
@@ -287,7 +287,7 @@ steps:
           machineType: custom-16-32768
           buildDirectory: /dev/shm/bk
         env:
-          BWC_VERSION: 8.15.4
+          BWC_VERSION: 8.15.6
 
       - label: "{{matrix.image}} / 8.16.2 / packaging-tests-upgrade"
         command: ./.ci/scripts/packaging-test.sh -Dbwc.checkout.align=true destructiveDistroUpgradeTest.v8.16.2
diff --git a/.buildkite/pipelines/periodic.yml b/.buildkite/pipelines/periodic.yml
index aa1db893df8c..69d11ef1dabb 100644
--- a/.buildkite/pipelines/periodic.yml
+++ b/.buildkite/pipelines/periodic.yml
@@ -287,8 +287,8 @@ steps:
             - signal_reason: agent_stop
               limit: 3
 
-      - label: 8.15.4 / bwc
-        command: .ci/scripts/run-gradle.sh -Dbwc.checkout.align=true v8.15.4#bwcTest
+      - label: 8.15.6 / bwc
+        command: .ci/scripts/run-gradle.sh -Dbwc.checkout.align=true v8.15.6#bwcTest
         timeout_in_minutes: 300
         agents:
           provider: gcp
@@ -297,7 +297,7 @@ steps:
           buildDirectory: /dev/shm/bk
           preemptible: true
         env:
-          BWC_VERSION: 8.15.4
+          BWC_VERSION: 8.15.6
         retry:
           automatic:
             - exit_status: "-1"
diff --git a/.ci/bwcVersions b/.ci/bwcVersions
index a8d6dda4fb0c..826091807ce5 100644
--- a/.ci/bwcVersions
+++ b/.ci/bwcVersions
@@ -14,7 +14,7 @@ BWC_VERSION:
   - "8.12.2"
   - "8.13.4"
   - "8.14.3"
-  - "8.15.4"
+  - "8.15.6"
   - "8.16.2"
   - "8.17.0"
   - "8.18.0"
diff --git a/server/src/main/java/org/elasticsearch/Version.java b/server/src/main/java/org/elasticsearch/Version.java
index 7b65547a7d59..24aa5bd261d7 100644
--- a/server/src/main/java/org/elasticsearch/Version.java
+++ b/server/src/main/java/org/elasticsearch/Version.java
@@ -187,6 +187,7 @@ public class Version implements VersionId<Version>, ToXContentFragment {
     public static final Version V_8_15_2 = new Version(8_15_02_99);
     public static final Version V_8_15_3 = new Version(8_15_03_99);
     public static final Version V_8_15_4 = new Version(8_15_04_99);
+    public static final Version V_8_15_6 = new Version(8_15_06_99);
     public static final Version V_8_16_0 = new Version(8_16_00_99);
     public static final Version V_8_16_1 = new Version(8_16_01_99);
     public static final Version V_8_16_2 = new Version(8_16_02_99);
diff --git a/server/src/main/resources/org/elasticsearch/TransportVersions.csv b/server/src/main/resources/org/elasticsearch/TransportVersions.csv
index 6191922f1309..faeb7fe84815 100644
--- a/server/src/main/resources/org/elasticsearch/TransportVersions.csv
+++ b/server/src/main/resources/org/elasticsearch/TransportVersions.csv
@@ -132,5 +132,6 @@
 8.15.2,8702003
 8.15.3,8702003
 8.15.4,8702003
+8.15.5,8702003
 8.16.0,8772001
 8.16.1,8772004
diff --git a/server/src/main/resources/org/elasticsearch/index/IndexVersions.csv b/server/src/main/resources/org/elasticsearch/index/IndexVersions.csv
index f84d69af727a..1fc8bd8648ad 100644
--- a/server/src/main/resources/org/elasticsearch/index/IndexVersions.csv
+++ b/server/src/main/resources/org/elasticsearch/index/IndexVersions.csv
@@ -132,5 +132,6 @@
 8.15.2,8512000
 8.15.3,8512000
 8.15.4,8512000
+8.15.5,8512000
 8.16.0,8518000
 8.16.1,8518000