1 files changed, 3 insertions, 0 deletions
diff --git a/core/fpdfapi/parser/cpdf_security_handler.cpp b/core/fpdfapi/parser/cpdf_security_handler.cpp
index bc72ad3b33..f3d9201cbf 100644
--- a/core/fpdfapi/parser/cpdf_security_handler.cpp
+++ b/core/fpdfapi/parser/cpdf_security_handler.cpp
@@ -157,6 +157,9 @@ static bool LoadCryptInfo(const CPDF_Dictionary* pEncryptDict,
       } else {
         nKeyBits = pEncryptDict->GetIntegerFor("Length", 256);
       }
+      if (nKeyBits < 0)
+        return false;
+
       if (nKeyBits < 40) {
         nKeyBits *= 8;
       }