When using a build of JDK 21.0.6.7.1 or 21.0.7.6.1 on linux and running with param `-Djava.security.manager=allow`, the changes made by JDK-8342905 and JDK-8344993 introduce a regression. This behavior is not present prior to those commits (with JDK  21.0.5.11.1).

To reproduce: 
1. Build JDK
2. Create App.java:
```
public class App {
    public static void main(String[] args) {
        var defaultExecutor = ForkJoinPool.commonPool();
        defaultExecutor.execute(() -> {
            Thread t = Thread.currentThread();
            System.out.println("Running in thread: " + t.getClass().getName());

            try {
                t.setContextClassLoader(new java.net.URLClassLoader(new java.net.URL[0]));
                System.out.println("Set context class loader.");
            } catch (SecurityException e) {
                System.err.println("SecurityException: " + e.getMessage());
                e.printStackTrace();
            }
        });

        try {
            Thread.sleep(1_000);
        } catch (InterruptedException e) {
            throw new RuntimeException(e);
        }
    }
}
```
3. Run `javac App.java`
4. Run `java -Djava.security.manager=allow App`