CVE-2013-1952: Xen 4.x, when using Intel VT-d for a bus mastering capable PCI device, does not properly check the source w...

Security readout for executives and security teams

This is a virtualization isolation flaw in Xen 4.x configurations using Intel VT-d with certain PCI device handling. A local guest VM could cause a denial of service, potentially disrupting other workloads on the host. The provided sources do not describe data theft, remote compromise, or active exploitation. Exposure is most likely in older Xen 4.x virtualization hosts using Intel VT-d and bus-mastering-capable PCI devices, especially where guest domains interact with PCI passthrough or bridge-related interrupt remapping behavior. Generic non-Xen systems are not implicated by the provided sources. Treat as a targeted infrastructure availability risk. It is not presented as remote code execution, but affected multi-tenant or untrusted-guest Xen environments should patch promptly because one guest could disrupt shared host capacity. Mitigation focus: Check Xen and Linux distribution advisories for fixed Xen packages.; Prioritize hosts using Xen 4.x with Intel VT-d and PCI passthrough exposure.; Apply vendor-provided Xen security updates from the relevant distribution..

Prepared

Jun 14, 2026, 22:07 UTC (UTC+00:00)

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