CVE-2012-6035: The do_tmem_destroy_pool function in the Transcendent Memory (TMEM) in Xen 4.0, 4.1, and 4.2 does not prope...

Security readout for executives and security teams

A user inside a Xen guest could trigger a flaw in Xen's TMEM handling and potentially crash the host. The CVE description also states arbitrary code execution is possible, but the public bundle does not provide details. This matters most for older Xen 4.0, 4.1, and 4.2 environments, especially where guests are not fully trusted. Exposure is likely limited to legacy Xen 4.0, 4.1, and 4.2 hosts with TMEM functionality present. The relevant attacker position is inside a guest OS, so shared hosting, multi-tenant virtualization, and environments with untrusted guest administrators carry the most concern. Treat this as a high-priority legacy virtualization risk if older Xen hosts remain in use. A guest-to-host crash or code execution issue can affect multiple workloads on the same physical server. If the organization no longer uses Xen 4.0 through 4.2, priority drops to inventory confirmation. Mitigation focus: Inventory Xen hosts and identify versions 4.0, 4.1, and 4.2.; Review Xen XSA-15 and vendor advisories for fixed packages or supported mitigations.; Apply vendor security updates where available for affected Xen installations..

Prepared

Jun 24, 2026, 12:04 UTC (UTC+00:00)

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