From 77a8f019e353a6dd2bcabb262c2383d3c67137d3 Mon Sep 17 00:00:00 2001
From: Kim Kulling <kim.kulling@draeger.com>
Date: Wed, 22 Nov 2023 10:02:29 +0100
Subject: [PATCH] Fix: Check if index for mesh access is out of range

---
 code/AssetLib/Blender/BlenderModifier.cpp | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/code/AssetLib/Blender/BlenderModifier.cpp b/code/AssetLib/Blender/BlenderModifier.cpp
index 6cc11ec8e..f925de608 100644
--- a/code/AssetLib/Blender/BlenderModifier.cpp
+++ b/code/AssetLib/Blender/BlenderModifier.cpp
@@ -283,6 +283,11 @@ void BlenderModifier_Subdivision ::DoIt(aiNode &out, ConversionData &conv_data,
     if (conv_data.meshes->empty()) {
         return;
     }
+    const size_t meshIndex = conv_data.meshes->size() - out.mNumMeshes;
+    if (meshIndex >= conv_data.meshes->size()) {
+        ASSIMP_LOG_ERROR("Invalid index detected.");
+        return;
+    }
     aiMesh **const meshes = &conv_data.meshes[conv_data.meshes->size() - out.mNumMeshes];
     std::unique_ptr<aiMesh *[]> tempmeshes(new aiMesh *[out.mNumMeshes]());