diff --git a/flight/flight-core/src/main/java/org/apache/arrow/flight/grpc/GetReadableBuffer.java b/flight/flight-core/src/main/java/org/apache/arrow/flight/grpc/GetReadableBuffer.java
index 45c32a86c..fcba88d21 100644
--- a/flight/flight-core/src/main/java/org/apache/arrow/flight/grpc/GetReadableBuffer.java
+++ b/flight/flight-core/src/main/java/org/apache/arrow/flight/grpc/GetReadableBuffer.java
@@ -87,13 +87,13 @@ public static void readIntoBuffer(
       final InputStream stream, final ArrowBuf buf, final int size, final boolean fastPath)
       throws IOException {
     ReadableBuffer readableBuffer = fastPath ? getReadableBuffer(stream) : null;
+    byte[] heapBytes = new byte[size];
     if (readableBuffer != null) {
-      readableBuffer.readBytes(buf.nioBuffer(0, size));
+      readableBuffer.readBytes(heapBytes, 0, size);
     } else {
-      byte[] heapBytes = new byte[size];
       ByteStreams.readFully(stream, heapBytes);
-      buf.writeBytes(heapBytes);
     }
+    buf.writeBytes(heapBytes);
     buf.writerIndex(size);
   }
 }
diff --git a/pom.xml b/pom.xml
index 7bc88675a..f46f53edb 100644
--- a/pom.xml
+++ b/pom.xml
@@ -99,7 +99,7 @@ under the License.
     <dep.slf4j.version>2.0.17</dep.slf4j.version>
     <dep.guava-bom.version>33.4.8-jre</dep.guava-bom.version>
     <dep.netty-bom.version>4.2.9.Final</dep.netty-bom.version>
-    <dep.grpc-bom.version>1.78.0</dep.grpc-bom.version>
+    <dep.grpc-bom.version>1.79.0</dep.grpc-bom.version>
     <dep.protobuf-bom.version>4.33.4</dep.protobuf-bom.version>
     <dep.jackson-bom.version>2.21.0</dep.jackson-bom.version>
     <dep.hadoop.version>3.4.2</dep.hadoop.version>