⚠ Emergency Security Maintenance Notice
Security Advisory: CVE-2026-53359 (Januscape)
Severity: CRITICAL (CVSS 9.8)

A recently disclosed critical Linux Kernel vulnerability affecting KVM virtualization hosts requires an immediate kernel security update.

To protect all customer services, we will be performing an emergency maintenance which requires a host server reboot.

Maintenance Information

Reason Critical Linux Kernel Security Update (CVE-2026-53359)
Date Publicly disclosed (Published): 16 June 2026
Expected Downtime Approximately 15–30 minutes
Affected Services Websites, Email, SSH, FTP, Control Panel, and other hosted services.

Why is a Reboot Required?

This vulnerability exists within the operating system kernel itself. While the security update can be installed immediately, the protection only becomes active after the physical host has been rebooted.

This maintenance is essential to ensure the continued security and stability of all customer virtual machines and hosting services.

No action is required from customers.

All services will automatically resume once the maintenance has been completed successfully.
Security Advisory
CVE-2026-53359 ("Januscape") is a critical Linux Kernel KVM vulnerability with a CVSS score of 9.8. The issue has been addressed by Linux kernel maintainers and operating system vendors through updated kernel packages. Applying the kernel update and rebooting the host is the recommended permanent solution.

Thank you for your patience and understanding while we perform this important security maintenance.

Xisto Support Team



Duminică, Iulie 26, 2026

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