We have pushed updates to both the Early Access and Normal update channels of XenServer 8.4. We recommend that customers update to the latest version from their chosen channel following the instructions at https://docs.xenserver.com/en-us/xenserver/8/update. However, customers should note that the AMD microcode update provided is only effective on systems where the system firmware ("BIOS") has been updated to a version that includes a fix for CVE-2024-36347. This may be marked in the firmware release notes by reference to the firmware containing âAGESA PI 1.0.0.4â or later. Customers who are uncertain about their firmware version are recommended to contact their hardware vendor. What We Are Doing We are notifying customers and channel partners about this potential security issue through the publication of this security bulletin on the Citrix Knowledge Center at https://support.citrix.com/securitybulletins. Obtaining Support on This Issue If you require technical assistance with this issue, please contact Citrix Technical Support. Contact details for Citrix Technical Support are available at https://www.citrix.com/support. Subscribe to Receive Alerts We strongly recommend that all customers subscribe to receive alerts when a security bulletin is created or modified at https://support.citrix.com/user/alerts. Reporting Security Vulnerabilities to Us We welcome input regarding the security of our products and consider any and all potential vulnerabilities seriously. For details on our vulnerability response process and guidance on how to report security-related issues to us, please see the following webpage: https://www.citrix.com/about/trust-center/vulnerability-process.html. Change Log 2025-12-08 Initial Publication This document is provided on an "as is" basis and do