CVE-2013-4494: Xen before 4.1.x, 4.2.x, and 4.3.x does not take the page_alloc_lock and grant_table.lock in the same order...

Security readout for executives and security teams

This Xen issue lets an administrator inside a guest VM potentially deadlock the host, causing a denial of service. It is most urgent for organizations running shared or business-critical Xen virtualization, especially where guest administrators are not fully trusted. Exposure is likely limited to Xen hosts from the affected 4.1.x, 4.2.x, and 4.3.x-era lines before vendor-fixed packages, especially multi-tenant platforms or environments granting guest admin control over multi-vCPU VMs. Treat as a high-priority availability risk for Xen-based hosting or internal cloud environments. It does not indicate data theft, but one guest administrator may be able to disrupt the host and other workloads. Mitigation focus: Apply Xen updates from the relevant vendor advisory or distribution channel.; Check vendor guidance when exact fixed package versions are unclear.; Prioritize shared hypervisors and hosts running untrusted guest administrators..

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.