diff --git a/common.gypi b/common.gypi
index 5e6383ab3cc44d..ba6b791a6ccf82 100644
--- a/common.gypi
+++ b/common.gypi
@@ -36,7 +36,7 @@
 
     # Reset this number to 0 on major V8 upgrades.
     # Increment by one for each non-official patch applied to deps/v8.
-    'v8_embedder_string': '-node.8',
+    'v8_embedder_string': '-node.9',
 
     ##### V8 defaults for Node.js #####
 
diff --git a/deps/v8/src/objects/value-serializer.cc b/deps/v8/src/objects/value-serializer.cc
index 4ecf4832989292..246281e4e2b44b 100644
--- a/deps/v8/src/objects/value-serializer.cc
+++ b/deps/v8/src/objects/value-serializer.cc
@@ -1190,7 +1190,8 @@ Maybe<T> ValueDeserializer::ReadZigZag() {
 
 Maybe<double> ValueDeserializer::ReadDouble() {
   // Warning: this uses host endianness.
-  if (position_ > end_ - sizeof(double)) return Nothing<double>();
+  if (sizeof(double) > static_cast<unsigned>(end_ - position_))
+    return Nothing<double>();
   double value;
   base::Memcpy(&value, position_, sizeof(double));
   position_ += sizeof(double);
diff --git a/test/parallel/test-v8-serdes.js b/test/parallel/test-v8-serdes.js
index 2ccfc9943a9175..1d3b6ff81168e7 100644
--- a/test/parallel/test-v8-serdes.js
+++ b/test/parallel/test-v8-serdes.js
@@ -236,3 +236,10 @@ const hostObject = new (internalBinding('js_stream').JSStream)();
     /^TypeError: buffer must be a TypedArray or a DataView$/,
   );
 }
+
+{
+  // Regression test for https://github.com/nodejs/node/issues/37978
+  assert.throws(() => {
+    new v8.Deserializer(new v8.Serializer().releaseBuffer()).readDouble();
+  }, /ReadDouble\(\) failed/);
+}