diff --git a/wp-includes/functions.php b/wp-includes/functions.php
index be03264455..dfe8af4335 100644
--- a/wp-includes/functions.php
+++ b/wp-includes/functions.php
@@ -3150,6 +3150,11 @@ function wp_check_filetype_and_ext( $file, $filename, $mimes = null ) {
 		$real_mime = finfo_file( $finfo, $file );
 		finfo_close( $finfo );
 
+		// finfo_file() returns redudant mime type for Google docs, see #57898.
+		if ( 'application/vnd.openxmlformats-officedocument.wordprocessingml.documentapplication/vnd.openxmlformats-officedocument.wordprocessingml.document' === $real_mime ) {
+			$real_mime = 'application/vnd.openxmlformats-officedocument.wordprocessingml.document';
+		}
+
 		// fileinfo often misidentifies obscure files as one of these types.
 		$nonspecific_types = array(
 			'application/octet-stream',
diff --git a/wp-includes/version.php b/wp-includes/version.php
index 894fa13c09..d8af836c39 100644
--- a/wp-includes/version.php
+++ b/wp-includes/version.php
@@ -16,7 +16,7 @@
  *
  * @global string $wp_version
  */
-$wp_version = '6.4-alpha-56496';
+$wp_version = '6.4-alpha-56497';
 
 /**
  * Holds the WordPress DB revision, increments when changes are made to the WordPress DB schema.