What Customers Should Do

Citrix strongly urges affected customers of UniconOS to install the relevant packages as soon as possible:

Current Release (CR)

UniconOS (eLux) 2609 and earlier:

• Recommended Action
• Install the updated EPM kernel-6.18.59.7.2609.0-1 as soon as possible.
• Download Link:
• UniconOS 2609 Downloads

Long Term Service Release (LTSR)

UniconOS (eLux) 2603 LTSR CU2 and earlier:

• Recommended Action
• Install the updated EPM kernel-6.18.59.7.2603.2000-1 as soon as possible.
• Download Link:
• UniconOS 2603 LTSR CU2 Downloads

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Description of Problem

Citrix UniconOS (formerly eLux) is impacted by the following vulnerability -

• CVE-2026-98432 - Linux kernel IPv4 TCP use-after-free Issue

Affected Versions:

The vulnerability affects the following supported versions of Citrix UniconOS (formerly eLux).

Current Release (CR)

• Citrix UniconOS versions 2609 and earlier

Long Term Service Release (LTSR)

• Citrix UniconOS versions 2603 LTSR CU2 and earlier

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://support.citrix.com/support-home/home 

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Reporting Security Vulnerabilities to Citrix

Citrix welcomes input regarding the security of its products and considers any and all potential vulnerabilities seriously. For details on our vulnerability response process and guidance on how to report security-related issues to Citrix, please see the following webpage: https://www.cloud.com/trust-center/support 

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