CVE-2012-0217: The x86-64 kernel system-call functionality in Xen 4.1.2 and earlier, as used in Citrix XenServer 6.0.2 and...

Security readout for executives and security teams

CVE-2012-0217 is an old but serious local privilege escalation affecting several 64-bit operating systems and Xen-based virtualization environments on Intel processors. A local user or guest could potentially gain higher privileges because affected kernels mishandled a specific system-call return path. Business urgency depends on whether legacy systems remain in service. Exposure is most likely in legacy x86-64 Intel systems, especially old Xen PV virtualization stacks, unsupported Windows 7 or Server 2008 R2, and older Unix-like builds. Current exposure should be confirmed by inventory, because the source bundle does not provide present-day prevalence. Treat as high priority for legacy estate review, not as an internet-edge emergency. The main business risk is privilege escalation on old servers or virtualization hosts that still run sensitive workloads or support multiple users or tenants. Mitigation focus: Inventory x86-64 Intel hosts and guests against the affected product list.; Apply relevant vendor security updates from Xen, Citrix, Microsoft, Debian, NetBSD, illumos, and others.; Prioritize multi-tenant Xen PV hosts and systems with untrusted local users..

Prepared

Jun 24, 2026, 12:34 UTC (UTC+00:00)

Generated from the cited source records. This long-tail analysis has not been individually reviewed by a named human.