If you have access to create IBM support tickets, then open a Sev 3 IBM Support ticket with the description "Subscribing to CVE-2021-44228 Apache Log4j Information Server Patch Updates". Then you will receive updates on this issue
This is their latest bulletin
https://www.ibm.com/support/pages/node/6527372
#DataIntegration#DataStage#Support#SupportMigration