diff --git a/koboldcpp.py b/koboldcpp.py
index 2be2a1b330197..8f7bd24722579 100644
--- a/koboldcpp.py
+++ b/koboldcpp.py
@@ -1899,7 +1899,7 @@ def togglehorde(a,b,c):
 
     # Image Gen Tab
     images_tab = tabcontent["Image Gen"]
-    makefileentry(images_tab, "Stable Diffusion Model (f16 safetensors):", "Select Stable Diffusion Model File", sd_model_var, 1, filetypes=[("*.safetensors","*.safetensors")], tooltiptxt="Select a .safetensors Stable Diffusion model file on disk to be loaded.")
+    makefileentry(images_tab, "Stable Diffusion Model (safetensors/gguf):", "Select Stable Diffusion Model File", sd_model_var, 1, filetypes=[("*.safetensors *.gguf","*.safetensors *.gguf")], tooltiptxt="Select a .safetensors or .gguf Stable Diffusion model file on disk to be loaded.")
     makecheckbox(images_tab, "Quick Mode (Low Quality)", sd_quick_var, 4,tooltiptxt="Force optimal generation settings for speed.")
     makelabelentry(images_tab, "Image threads:" , sd_threads_var, 6, 50,"How many threads to use during image generation.\nIf left blank, uses same value as threads.")
     makecheckbox(images_tab, "Compress Weights (Saves Memory)", sd_quant_var, 8,tooltiptxt="Quantizes the SD model weights to save memory. May degrade quality.")
diff --git a/otherarch/ggml_v3.c b/otherarch/ggml_v3.c
index 119902a5e5fe4..33ada25e49262 100644
--- a/otherarch/ggml_v3.c
+++ b/otherarch/ggml_v3.c
@@ -20058,6 +20058,12 @@ struct gguf_v3_context * gguf_v3_init_from_file(const char * fname, struct gguf_
             fprintf(stderr, "%s: GGUFv1 is deprecated. please update if possible.\n", __func__);
         }
 
+        // sanity-checks to prevent from integer/buffer overflows
+
+        ok = ok && (ctx->header.n_tensors < (SIZE_MAX/2)/sizeof(struct gguf_v3_tensor_info));
+        ok = ok && (ctx->header.n_tensors < (SIZE_MAX/2)/ggml_v3_tensor_overhead());
+        ok = ok && (ctx->header.n_kv      < (SIZE_MAX/2)/sizeof(struct gguf_v3_kv));
+
         if (!ok) {
             fprintf(stderr, "%s: failed to read header\n", __func__);
             fclose(file);
diff --git a/otherarch/sdcpp/model.cpp b/otherarch/sdcpp/model.cpp
index 7a0efa75e6737..58cdd939af585 100644
--- a/otherarch/sdcpp/model.cpp
+++ b/otherarch/sdcpp/model.cpp
@@ -675,10 +675,13 @@ bool ModelLoader::init_from_file(const std::string& file_path, const std::string
     } else if (is_safetensors_file(file_path)) {
         LOG_INFO("load %s using safetensors format", file_path.c_str());
         return init_from_safetensors_file(file_path, prefix);
-    } else if (is_zip_file(file_path)) {
-        LOG_INFO("load %s using checkpoint format", file_path.c_str());
-        return init_from_ckpt_file(file_path, prefix);
-    } else {
+    }
+    //disable ckpt loading
+    // else if (is_zip_file(file_path)) {
+    //     LOG_INFO("load %s using checkpoint format", file_path.c_str());
+    //     return init_from_ckpt_file(file_path, prefix);
+    // } else
+    {
         LOG_WARN("unknown format %s", file_path.c_str());
         return false;
     }