Right front CV boot is torn and leaking grease?

Hello,

When a CV boot gets torn apart it allows dirt and debris to enter the joint.
It can damage the shaft depending on how much debris and how long it has been like this. If it is bad enough then changing out the complete shaft is recommended.

Here is a helpful article:

https://www.2carpros.com/articles/replace-cv-axle

I have attached diagrams for your reference.

Please let me know of any questions.
Thank you.