The java.util.zip library is vulnerable to a race condition that can lead to a remote code execution attack. The library does not properly handle symbolic links, which can allow an attacker to create a malicious zip file that will execute code when opened by a victim. The java.util.zip.Adler32 class also contains a race condition that leads to a remote code execution vulnerability. This class is used by many programs and libraries, so any program that uses it is vulnerable. The vulnerable code is in the update method, which is used to update the Adler-32 checksum with new data. This method contains a race condition that can be exploited to update the checksum with arbitrary data, resulting in a remote code execution vulnerability. The java.util.concurrent.atomic.AtomicInteger class in the Java standard library contains a race condition that can be exploited to achieve remote code execution. This class is used to maintain an integer value that can be updated atomically. However, the implementation of the compareAndSet() method contains a flaw that can be exploited to corrupt memory. This can be exploited to inject and execute arbitrary code.