The HVMOP_set_mem_access HVM control operations in Xen 4.1.x for 32-bit and 4.1.x through 4.4.x for 64-bit allow local guest administrators to cause a denial of service (CPU consumption) by leveraging access to certain service domains for HVM guests and a large input.
CVSS Severity (version 2.0):
Impact Subscore: 6.9
Exploitability Subscore: 3.9
CVSS Version 2 Metrics:
Access Vector: Locally exploitable
Access Complexity: Low
Authentication: Not required to exploit
Impact Type: Allows disruption of service
References to Advisories, Solutions, and Tools
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Advisory; Patch Information
[oss-security] 20140325 Re: Xen Security Advisory 89 - HVMOP_set_mem_access is not preemptible
[oss-security] 20140325 Xen Security Advisory 89 - HVMOP_set_mem_access is not preemptible