The hvm_set_callback_via function in arch/x86/hvm/irq.c in Xen 4.6 does not limit the number of printk console messages when logging the new callback method, which allows local HVM guest OS users to cause a denial of service via a large number of changes to the callback method (HVM_PARAM_CALLBACK_IRQ).
| Name | Vendor | Start Version | End Version |
|---|---|---|---|
| Xen | Xen | 4.6.0 | 4.6.0 |