Outage in IONOS Cloud
Compute Host Security Update - Permanent Fix Rollout (CVE-2026-99999)
Resolved MinorIncident Report
Summary AI Generated
IONOS Cloud rolled out a permanent kernel fix for CVE-2026-99999 across its Compute and Cubes infrastructure over approximately 56 hours. The update was deployed via live migration to minimize disruption, though some virtual machines that could not be live-migrated experienced brief restarts. The rollout completed successfully, with all hosts now fully protected.
We are rolling out a security update across our Compute infrastructure to address CVE-2026-99999. A runtime mitigation has already been applied to a large portion of our fleet, and we are now deploying the permanent kernel fix across all remaining hosts.
The permanent fix is applied via live migration to avoid service disruption. In rare cases, virtual machines that cannot be live-migrated may experience a brief restart.
Components affected
IONOS Cloud Compute IONOS Cloud Compute IONOS Cloud Compute IONOS Cloud Compute IONOS Cloud Compute IONOS Cloud Compute IONOS Cloud Compute IONOS Cloud Cubes IONOS Cloud Cubes IONOS Cloud Cubes IONOS Cloud CubesTrusted by 1,000+ teams
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Latest Updates ( sorted recent to last )
RESOLVED
15 days ago - at 10/25/2026 06:45PM
The security update for CVE-2026-99999 has been applied across our Compute infrastructure. All hosts are now protected.
We will continue to monitor for any issues. If you experience any problems, please contact our support team.
IDENTIFIED
17 days ago - at 10/23/2026 10:44AM
We are rolling out a security update across our Compute infrastructure to address CVE-2026-99999. A runtime mitigation has already been applied to a large portion of our fleet, and we are now deploying the permanent kernel fix across all remaining hosts.
The permanent fix is applied via live migration to avoid service disruption. In rare cases, virtual machines that cannot be live-migrated may experience a brief restart.
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