More information about this security flaw is available in the following bug: https://bugzilla.redhat.com/show_bug.cgi?id=2358138 Disclaimer: Community trackers are created by Red Hat Product Security team on a best effort basis. Package maintainers are required to ascertain if the flaw indeed affects their package, before starting the update process.
The vulnerability report contains little detail. However, the function stb_include_string appears in the stb_include.h library. The retroarch package does not include this library, so it cannot be affected.