Index: src/wp-includes/random_compat/random_bytes_mcrypt.php
===================================================================
--- src/wp-includes/random_compat/random_bytes_mcrypt.php	(revision 53791)
+++ src/wp-includes/random_compat/random_bytes_mcrypt.php	(working copy)
@@ -57,7 +57,7 @@
         }
 
         /** @var string|bool $buf */
-        $buf = @mcrypt_create_iv((int) $bytes, (int) MCRYPT_DEV_URANDOM);
+        $buf = random_bytes((int) $bytes);
         if (
             is_string($buf)
                 &&