diff --git a/build.gradle b/build.gradle
index 79174b8eeb6..888db0df60f 100644
--- a/build.gradle
+++ b/build.gradle
@@ -40,7 +40,7 @@ ext {
 	log4jVersion         = "2.11.2"
 	nettyVersion         = "4.1.34.Final"
 	quartzVersion        = "2.3.0"
-	reactorVersion       = "Californium-BUILD-SNAPSHOT"
+	reactorVersion       = "Californium-SR6"
 	rxjavaVersion        = "1.3.8"
 	rxjavaAdapterVersion = "1.2.1"
 	rxjava2Version       = "2.2.8"
@@ -149,7 +149,6 @@ configure(allprojects) { project ->
 
 	repositories {
 		maven { url "https://repo.spring.io/libs-release" }
-		maven { url "https://repo.spring.io/snapshot" } // Reactor
 		maven { url "https://oss.jfrog.org/artifactory/libs-snapshot" } // RSocket
 		mavenLocal()
 	}
diff --git a/spring-core/src/main/java/org/springframework/core/io/buffer/DataBufferUtils.java b/spring-core/src/main/java/org/springframework/core/io/buffer/DataBufferUtils.java
index 40198ba9fa5..359cf189c4b 100644
--- a/spring-core/src/main/java/org/springframework/core/io/buffer/DataBufferUtils.java
+++ b/spring-core/src/main/java/org/springframework/core/io/buffer/DataBufferUtils.java
@@ -57,6 +57,12 @@ public abstract class DataBufferUtils {
 
 	private static final Consumer<DataBuffer> RELEASE_CONSUMER = DataBufferUtils::release;
 
+	/**
+	 * Workaround to disable use of pooled buffers:
+	 * https://github.com/reactor/reactor-core/issues/1634.
+	 */
+	private static final DataBufferFactory defaultDataBufferFactory = new DefaultDataBufferFactory();
+
 
 	//---------------------------------------------------------------------
 	// Reading
@@ -135,12 +141,14 @@ public abstract class DataBufferUtils {
 		Assert.isTrue(position >= 0, "'position' must be >= 0");
 		Assert.isTrue(bufferSize > 0, "'bufferSize' must be > 0");
 
+		DataBufferFactory bufferFactoryToUse = defaultDataBufferFactory;
+
 		Flux<DataBuffer> flux = Flux.using(channelSupplier,
 				channel -> Flux.create(sink -> {
 					ReadCompletionHandler handler =
-							new ReadCompletionHandler(channel, sink, position, bufferFactory, bufferSize);
+							new ReadCompletionHandler(channel, sink, position, bufferFactoryToUse, bufferSize);
 					sink.onDispose(handler::dispose);
-					DataBuffer dataBuffer = bufferFactory.allocateBuffer(bufferSize);
+					DataBuffer dataBuffer = bufferFactoryToUse.allocateBuffer(bufferSize);
 					ByteBuffer byteBuffer = dataBuffer.asByteBuffer(0, bufferSize);
 					channel.read(byteBuffer, position, dataBuffer, handler);
 				}),