The vgic_distr_mmio_write function in the virtual guest interrupt controller (GIC) distributor (arch/arm/vgic.c) in Xen 4.4.x, when running on an ARM system, allows local guest users to cause a denial of service (NULL pointer dereference and host crash) via unspecified vectors.
CVSS Severity (version 2.0):
Impact Subscore: 6.9
Exploitability Subscore: 5.1
CVSS Version 2 Metrics:
Access Vector: Local network exploitable
Access Complexity: Low
Authentication: Required to exploit
Impact Type: Allows disruption of service
References to Advisories, Solutions, and Tools
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[oss-security] 20140423 Xen Security Advisory 94 - ARM hypervisor crash on guest interrupt controller access
[oss-security] 20140423 Xen Security Advisory 94 (CVE-2014-2986) - ARM hypervisor crash on guest interrupt controller access
[oss-security] 20140423 Re: Xen Security Advisory 94 - ARM hypervisor crash on guest interrupt controller access
Advisory; Patch Information
Vulnerable software and versions