CVE-2014-1666: Xen

High severity, CVSS 8.3. EPSS: 0.9% chance of exploitation in the next 30 days.

The do_physdev_op function in Xen 4.1.5, 4.1.6.1, 4.2.2 through 4.2.3, and 4.3.x does not properly restrict access to the (1) PHYSDEVOP_prepare_msix and (2) PHYSDEVOP_release_msix operations, which allows local PV guests to cause a denial of service (host or guest malfunction) or possibly gain privileges via unspecified vectors.

Affected products

• Xen Xen: version 4.1.5 only; version 4.1.6.1 only; version 4.2.2 only; version 4.2.3 only; version 4.3.0 only; version 4.3.1 only

Published 2014-01-26. Last modified 2026-06-17.