CVE-2013-6375: Xen 4.2.x and 4.3.x, when using Intel VT-d for PCI passthrough, does not properly flush the TLB after clear...

Security readout for executives and security teams

This is a Xen hypervisor flaw affecting Xen 4.2.x and 4.3.x only in environments using Intel VT-d for PCI passthrough. A guest administrator could trigger denial of service or potentially gain privileges. The bundle does not show active exploitation or a CVSS score. Exposure is limited to Xen 4.2.x or 4.3.x hosts using Intel VT-d with PCI passthrough. Xen hosts without PCI passthrough, without Intel VT-d, or outside those versions are not identified as affected in the supplied sources. Prioritize remediation for shared or multi-tenant Xen hosts using PCI passthrough. The potential impact is serious, but exposure depends on a specific virtualization configuration and local guest-administrator access. Mitigation focus: Identify Xen hosts running 4.2.x or 4.3.x.; Check whether Intel VT-d PCI passthrough is enabled.; Review Xen Security Advisory 78 and vendor advisories..

Prepared

Jun 14, 2026, 15:13 UTC (UTC+00:00)

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