diff --git a/CHANGELOG.md b/CHANGELOG.md
index 4f80499fa3..817abc7aee 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -13,6 +13,7 @@ This file is used to list changes made in each version of the AWS ParallelCluste
   - xdcv: `2024.0.631-1`
   - gl: `2024.0.1078-1`
   - web_viewer: `2024.0-18131-1`
+- Upgrade CUDA Toolkit to version 12.6.3 (from 12.4.1).
 
 **BUG FIXES**
 - Fix an issue in the way we get region when manage volumes so that it can correctly handle local zone.
diff --git a/THIRD-PARTY-LICENSES.txt b/THIRD-PARTY-LICENSES.txt
index 3cfca88a7e..e0808737c8 100644
--- a/THIRD-PARTY-LICENSES.txt
+++ b/THIRD-PARTY-LICENSES.txt
@@ -4628,7 +4628,7 @@ laws, restrictions or regulations.
 
 ------
 
-** Cuda Samples; version 12.4 -- https://github.com/NVIDIA/cuda-samples/
+** Cuda Samples; version 12.6 -- https://github.com/NVIDIA/cuda-samples/
 Copyright (c) 2022, NVIDIA CORPORATION. All rights reserved.
  
     * Package Cuda Samples's source code may be found at:
diff --git a/cookbooks/aws-parallelcluster-platform/recipes/install/cuda.rb b/cookbooks/aws-parallelcluster-platform/recipes/install/cuda.rb
index 152968a057..109e2189b2 100644
--- a/cookbooks/aws-parallelcluster-platform/recipes/install/cuda.rb
+++ b/cookbooks/aws-parallelcluster-platform/recipes/install/cuda.rb
@@ -19,13 +19,13 @@
 
 # Cuda installer from https://developer.nvidia.com/cuda-toolkit-archive
 # Cuda installer naming: cuda_11.8.0_520.61.05_linux
-cuda_version = '12.4'
-cuda_patch = '1'
+cuda_version = '12.6'
+cuda_patch = '3'
 cuda_complete_version = "#{cuda_version}.#{cuda_patch}"
 cuda_version_suffix = '550.54.15'
 cuda_arch = arm_instance? ? 'linux_sbsa' : 'linux'
 cuda_url = "#{node['cluster']['artifacts_s3_url']}/dependencies/cuda/cuda_#{cuda_complete_version}_#{cuda_version_suffix}_#{cuda_arch}.run"
-cuda_samples_version = '12.4'
+cuda_samples_version = '12.6'
 cuda_samples_url = "#{node['cluster']['artifacts_s3_url']}/dependencies/cuda/samples/v#{cuda_samples_version}.tar.gz"
 tmp_cuda_run = '/tmp/cuda.run'
 tmp_cuda_sample_archive = '/tmp/cuda-sample.tar.gz'
diff --git a/cookbooks/aws-parallelcluster-platform/spec/unit/recipes/cuda_spec.rb b/cookbooks/aws-parallelcluster-platform/spec/unit/recipes/cuda_spec.rb
index 5e241d8955..8d84bd3664 100644
--- a/cookbooks/aws-parallelcluster-platform/spec/unit/recipes/cuda_spec.rb
+++ b/cookbooks/aws-parallelcluster-platform/spec/unit/recipes/cuda_spec.rb
@@ -1,8 +1,8 @@
 require 'spec_helper'
 
 describe 'aws-parallelcluster-platform::cuda' do
-  cached(:cuda_version) { '12.4' }
-  cached(:cuda_patch) { '1' }
+  cached(:cuda_version) { '12.6' }
+  cached(:cuda_patch) { '3' }
   cached(:cuda_complete_version) { "#{cuda_version}.#{cuda_patch}" }
   cached(:cuda_version_suffix) { '550.54.15' }
 
@@ -20,7 +20,7 @@
   context 'when on arm' do
     cached(:cuda_arch) { 'linux_sbsa' }
     cached(:cuda_url) { "#{node['cluster']['artifacts_s3_url']}/dependencies/cuda/cuda_#{cuda_complete_version}_#{cuda_version_suffix}_#{cuda_arch}.run" }
-    cached(:cuda_samples_version) { '12.4' }
+    cached(:cuda_samples_version) { '12.6' }
     cached(:cuda_samples_url) { "#{node['cluster']['artifacts_s3_url']}/dependencies/cuda/samples/v#{cuda_samples_version}.tar.gz" }
 
     cached(:chef_run) do