1 files changed, 6 insertions, 0 deletions
diff --git a/fpdfsdk/formfiller/cffl_checkbox.cpp b/fpdfsdk/formfiller/cffl_checkbox.cpp
index 2863a56001..e9c72efd39 100644
--- a/fpdfsdk/formfiller/cffl_checkbox.cpp
+++ b/fpdfsdk/formfiller/cffl_checkbox.cpp
@@ -111,9 +111,15 @@ void CFFL_CheckBox::SaveData(CPDFSDK_PageView* pPageView) {
       }
     }
   }
+  CPDFSDK_Widget::ObservedPtr observed_widget(m_pWidget.Get());
+  CFFL_CheckBox::ObservedPtr observed_this(this);
 
   m_pWidget->SetCheck(bNewChecked, false);
+  if (!observed_widget)
+    return;
   m_pWidget->UpdateField();
+  if (!observed_widget || !observed_this)
+    return;
   SetChangeMark();
 }