Security Exploits of Database Links between 2 Database Servers

DB A has a database link to DB B, where the DB link logs into DB B using a DB account with only SELECT privilege. if DB B has been compromised in security-wise, would it be possible to manipulate the data in DB B (e.g. to take advantage of an exploit, SQL injection) such that when the data is returned from DB B into DB A, DB A can be similarly compromised? Or how it will impact in terms of security risks?