CVE-2008-3687: Xen

Medium severity, CVSS 6.8. EPSS: 2.9% chance of exploitation in the next 30 days.

Heap-based buffer overflow in the flask_security_label function in Xen 3.3, when compiled with the XSM:FLASK module, allows unprivileged domain users (domU) to execute arbitrary code via the flask_op hypercall.

Affected products

• Xen Xen: version 3.3 only
• Xen Xen Flask Module: any version

Published 2008-08-14. Last modified 2026-06-16.