diff --git a/ansible/roles/wipe-disks/library/blockdevice_info.py b/ansible/roles/wipe-disks/library/blockdevice_info.py
index b5fa5840c..4633e69b7 100644
--- a/ansible/roles/wipe-disks/library/blockdevice_info.py
+++ b/ansible/roles/wipe-disks/library/blockdevice_info.py
@@ -28,8 +28,14 @@ import json
 from ansible.module_utils.basic import AnsibleModule
 
 def _has_mounts(device):
-    if device["mountpoint"]:
-        return True
+    try:
+        if device["mountpoint"]:
+            return True
+    # If unmounted, the JSON output contains "mountpoints": [null] so we handle
+    # the KeyError here.
+    except KeyError:
+        if device["mountpoints"][0]:
+            return True
     for child in device.get("children", []):
         if _has_mounts(child):
             return True
@@ -69,4 +75,4 @@ def main():
 
 
 if __name__ == '__main__':
-    main()
\ No newline at end of file
+    main()
diff --git a/releasenotes/notes/wipe-disks-0e72c9c8b7bf7e18.yaml b/releasenotes/notes/wipe-disks-0e72c9c8b7bf7e18.yaml
new file mode 100644
index 000000000..4039359cf
--- /dev/null
+++ b/releasenotes/notes/wipe-disks-0e72c9c8b7bf7e18.yaml
@@ -0,0 +1,7 @@
+---
+fixes:
+  - |
+    Fixes the ``wipe-disks`` role which was failing on supported host operating
+    systems due to a change in the output format of ``lsblk -J`` in
+    ``util-linux`` version ``2.37``. LP#2051859
+    <https://bugs.launchpad.net/kayobe/+bug/2051859>__