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.
| Name | Vendor | Start Version | End Version |
|---|---|---|---|
| Xen | Xen | 4.1.5 | 4.1.5 |
| Xen | Xen | 4.2.2 | 4.2.2 |
| Xen | Xen | 4.2.3 | 4.2.3 |
| Xen | Xen | 4.3.0 | 4.3.0 |
| Xen | Xen | 4.1.6.1 | 4.1.6.1 |
| Xen | Xen | 4.3.1 | 4.3.1 |