diff --git a/source/blender/editors/sculpt_paint/paint_mask.cc b/source/blender/editors/sculpt_paint/paint_mask.cc
index dfca5553b00..c321e07fd13 100644
--- a/source/blender/editors/sculpt_paint/paint_mask.cc
+++ b/source/blender/editors/sculpt_paint/paint_mask.cc
@@ -1036,6 +1036,7 @@ static void sculpt_gesture_trim_geometry_generate(gesture::GestureData *gesture_
   ARegion *region = vc->region;
 
   const int tot_screen_points = gesture_data->tot_gesture_points;
+  BLI_assert(tot_screen_points > 1);
   float(*screen_points)[2] = gesture_data->gesture_points;
 
   const int trim_totverts = tot_screen_points * 2;
diff --git a/source/blender/editors/sculpt_paint/sculpt_gesture.cc b/source/blender/editors/sculpt_paint/sculpt_gesture.cc
index e5d6a4d095b..9504db2c7a1 100644
--- a/source/blender/editors/sculpt_paint/sculpt_gesture.cc
+++ b/source/blender/editors/sculpt_paint/sculpt_gesture.cc
@@ -104,6 +104,12 @@ GestureData *init_from_lasso(bContext *C, wmOperator *op)
     return nullptr;
   }
 
+  /* A single point is equally as invalid for a lasso gesture as no points. */
+  if (mcoords_len == 1) {
+    MEM_freeN((void *)mcoords);
+    return nullptr;
+  }
+
   gesture_data->lasso.projviewobjmat = ED_view3d_ob_project_mat_get(gesture_data->vc.rv3d,
                                                                     gesture_data->vc.obact);
   BLI_lasso_boundbox(&gesture_data->lasso.boundbox, mcoords, mcoords_len);