CVE-2017-10913: The grant-table feature in Xen through 4.8.x provides false mapping information in certain cases of concurr...

Security readout for executives and security teams

This is a Xen hypervisor issue in the grant-table feature through Xen 4.8.x. Under concurrent unmap activity, Xen can report incorrect mapping state. A malicious backend component could use that confusion to access sensitive information or gain privileges, affecting virtualization host isolation. Exposure is most likely on systems running Xen through 4.8.x, including downstream Debian or Gentoo Xen packages referenced by vendor advisories. Environments without Xen, or not using affected Xen versions, are not indicated as exposed by the bundle. Treat this as a high-priority infrastructure isolation issue where Xen is in use. It is not shown as actively exploited in the bundle, but privilege gain inside virtualization infrastructure can create outsized business impact. Mitigation focus: Check Xen XSA-218 and your OS vendor advisory for fixed package guidance.; Patch or upgrade affected Xen hypervisors through the supported vendor channel.; Prioritize shared virtualization hosts and systems running Xen through 4.8.x..

Prepared

Jun 13, 2026, 04:25 UTC (UTC+00:00)

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