CVE-2015-2045: The HYPERVISOR_xen_version hypercall in Xen 3.2.x through 4.5.x does not properly initialize data structure...

Security readout for executives and security teams

CVE-2015-2045 is an information disclosure issue in Xen. A user inside a guest VM could potentially obtain sensitive data because a Xen hypercall did not properly initialize internal data structures. The risk is most relevant to organizations running older Xen-based virtualization, especially where guest VMs are operated by different trust groups. Exposure is likely limited to Xen hypervisors in the 3.2.x through 4.5.x range, including downstream vendor packages referenced by Gentoo, Debian, Fedora, Citrix, Huawei, and openSUSE advisories. Systems not using Xen, or using remediated Xen packages, are not indicated as affected by the provided sources. Address during normal vulnerability remediation, with higher priority for shared virtualization platforms. The business concern is possible leakage across trust boundaries, not confirmed active exploitation. Legacy Xen environments should be verified because the affected version range is old and may still exist in neglected infrastructure. Mitigation focus: Identify Xen hosts running versions 3.2.x through 4.5.x.; Apply Xen XSA-122 fixes or downstream vendor security updates.; Prioritize multi-tenant or untrusted guest VM environments..

Prepared

Jun 14, 2026, 05:11 UTC (UTC+00:00)

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