diff --git a/.changelog/11830.txt b/.changelog/11830.txt
new file mode 100644
index 000000000000..29eb29a9a391
--- /dev/null
+++ b/.changelog/11830.txt
@@ -0,0 +1,3 @@
+```release-note:bug
+agent: Validate reserved_ports are valid to prevent unschedulable nodes.
+```