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                            CERT-Renater

                Note d'Information No. 2025/VULN413
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DATE                : 03/07/2025

HARDWARE PLATFORM(S): /

OPERATING SYSTEM(S): Systems running XenServer version 8.4.

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https://support.citrix.com/support-home/kbsearch/article?articleNumber=CTX694780&articleURL=XenServer_Security_Update_for_CVE_2025_27465
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XenServer Security Update for CVE-2025-27465

Article Id : CTX694780
Last Modified Date : 07-02-2025 12:24
Created Date : 07-02-2025 12:24
Article Record Type : Security Bulletin

Summary

Severity: Medium

Description of Problem

An issue has been identified in XenServer 8.4 that may allow
privileged code in a guest VM to cause the host to crash or become
unresponsive.

This issue has the following identifier:

    CVE-2025-27465


Affected Versions

This issue affects XenServer 8.4.

(Note that Citrix Hypervisor 8.2 CU1 is now End of Life (EoL) and
so no longer receives security updates or security bulletins)


Details

What Customers Should Do

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 


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.


Disclaimer

This document is provided on an "as is" basis and does not imply
any kind of guarantee or warranty, including the warranties of
merchantability or fitness for a particular use. Your use of the
information on the document is at your own risk. Cloud Software
Group reserves the right to change or update this document at
any time. Customers are therefore recommended to always view the
latest version of this document directly from the Citrix
Knowledge Center.


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