CVE-2012-4544: The PV domain builder in Xen 4.2 and earlier does not validate the size of the kernel or ramdisk (1) before...

Security readout for executives and security teams

This is a denial-of-service issue in older Xen virtualization hosts. A guest administrator who can control a PV guest kernel or ramdisk could make the host’s privileged domain consume memory, potentially disrupting other virtual machines on that host. Exposure is most likely on legacy Xen 4.2 or earlier systems running PV guests, especially where tenants or guest administrators can supply kernels or ramdisks. Treat as a legacy virtualization availability risk. Prioritize remediation for shared or tenant-facing Xen platforms; lower urgency for isolated, fully trusted lab systems. Mitigation focus: Apply Xen security updates from the relevant vendor advisory.; Upgrade legacy Xen 4.2-or-earlier hosts where feasible.; Restrict who can create PV guests or supply kernels and ramdisks..

Prepared

Jun 24, 2026, 19:46 UTC (UTC+00:00)

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