WildFly as such no.
but JDK on top with you are running it, could be affected.
some list of RHEL packages that are affected https://access.redhat.com/security/cve/cve-2015-7575
and there is update for Oracle JDK see Oracle Critical Patch Update - January 2016 to fix this.
Thank you. I wanted to confirm this. So that we can upgrade only java to fix this issue.