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CVE-2015-2756

QEMU, as used in Xen 3.3.x through 4.5.x, does not properly restrict access to PCI command registers, which might allow local HVM guest users to cause a denial…

Impact

QEMU, as used in Xen 3.3.x through 4.5.x, does not properly restrict access to PCI command registers, which might allow local HVM guest users to cause a denial of service (non-maskable interrupt and host crash) by disabling the (1) memory or (2) I/O decoding for a PCI Express device and then accessing the device, which triggers an Unsupported Request (UR) response.

Affected products

VendorProductAffected versions
DebianDebian Linux
Versions 7.0, 8.0
XenXen
Versions 4.3.0, 4.3.1, 4.3.2, 4.4.0, 4.4.1, 4.5.0
FedoraprojectFedora
Versions 20, 21
CanonicalUbuntu Linux
Versions 12.04, 14.04, 14.10, 15.04

Weakness classification

CWE-264

References