description: x86 shadow paging arbitrary pointer dereference In environments where host assisted address translation is necessary but Hardware Assisted Paging (HAP) is unavailable, Xen will run guests in so called shadow mode. Due to too lax a check in one of the hypervisor routines used for shadow page handling it is possible for a guest with a PCI device passed through to cause the hypervisor to access an arbitrary pointer partially under guest control.
problem types: unknown
affected:
{
vendor: Xen
product: xen
versions:
version: consult Xen advisory XSA-430, status: unknown
}
metrics:
other: [
type: unknown
content: {'description': {'description_data': [{'lang': 'eng', 'value': 'Guests running in shadow mode and having a PCI device passed through may be\nable to cause Denial of Service and other problems, escalation of privilege\ncannot be ruled out.'}]}}
]