Dear Customers,
HOST-C NETWORK has completed the deployment of security updates addressing CVE-2026-53359, also known as Januscape.
Advisory details:
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Advisory: HCSEC-2026-001
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CVE: CVE-2026-53359
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Affected component: Linux KVM virtualization
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Vulnerability type: Use-after-free in KVM x86 shadow paging
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Status: Resolved
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Completion date: July 16, 2026
The vulnerability could potentially allow a malicious virtual machine with the required access and configuration to crash or compromise its underlying virtualization host.
All affected HOST-C NETWORK infrastructure has been updated, and the necessary server restarts have been completed. All services are currently functioning normally.
No action is required from customers.
Further technical information is available from the National Vulnerability Database.
Kind regards,
HOST-C NETWORK Security Team
