diff --git a/release_notes/ocp-4-20-release-notes.adoc b/release_notes/ocp-4-20-release-notes.adoc
index 875c51c3b7..dfbbac7811 100644
--- a/release_notes/ocp-4-20-release-notes.adoc
+++ b/release_notes/ocp-4-20-release-notes.adoc
@@ -1795,6 +1795,7 @@ As a result, the controller handles errors during migration better.
 [id="ocp-release-note-node-tuning-operator-bug-fixes_{context}"]
 === Node Tuning Operator (NTO)
 
+* Before this update, the `iommu.passthrough=1` kernel argument caused an NVIDIA GPU validator failure on Advanced RISC Machine (ARM) CPUs in {product-title} 4.18. With this release, the kernel argument is removed from the default `Tuned` CR for ARM-based environments. (link:https://issues.redhat.com/browse/OCPBUGS-52853[OCPBUGS-52853])