diff --git a/Gems/Atom/Feature/Common/Code/Source/RayTracing/RayTracingFeatureProcessor.cpp b/Gems/Atom/Feature/Common/Code/Source/RayTracing/RayTracingFeatureProcessor.cpp
index d10da818ee..a17ecaf1aa 100644
--- a/Gems/Atom/Feature/Common/Code/Source/RayTracing/RayTracingFeatureProcessor.cpp
+++ b/Gems/Atom/Feature/Common/Code/Source/RayTracing/RayTracingFeatureProcessor.cpp
@@ -89,6 +89,9 @@ namespace AZ
             RHI::Ptr<RHI::Device> device = RHI::RHISystemInterface::Get()->GetDevice();
             uint32_t objectIndex = objectId.GetIndex();
 
+            // lock the mutex to protect the mesh and BLAS lists
+            AZStd::unique_lock<AZStd::mutex> lock(m_mutex);
+
             MeshMap::iterator itMesh = m_meshes.find(objectIndex);
             if (itMesh == m_meshes.end())
             {
@@ -169,6 +172,9 @@ namespace AZ
                 return;
             }
 
+            // lock the mutex to protect the mesh and BLAS lists
+            AZStd::unique_lock<AZStd::mutex> lock(m_mutex);
+
             MeshMap::iterator itMesh = m_meshes.find(objectId.GetIndex());
             if (itMesh != m_meshes.end())
             {
diff --git a/Gems/Atom/Feature/Common/Code/Source/RayTracing/RayTracingFeatureProcessor.h b/Gems/Atom/Feature/Common/Code/Source/RayTracing/RayTracingFeatureProcessor.h
index ee0a27b814..be75f0fac9 100644
--- a/Gems/Atom/Feature/Common/Code/Source/RayTracing/RayTracingFeatureProcessor.h
+++ b/Gems/Atom/Feature/Common/Code/Source/RayTracing/RayTracingFeatureProcessor.h
@@ -223,6 +223,9 @@ namespace AZ
             // cached TransformServiceFeatureProcessor
             TransformServiceFeatureProcessor* m_transformServiceFeatureProcessor = nullptr;
 
+            // mutex for the mesh and BLAS lists
+            AZStd::mutex m_mutex;
+
             // structure for data in the m_meshInfoBuffer, shaders that use the buffer must match this type
             struct MeshInfo
             {