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CVE-2015-2756

CVE-2015-2756

EPSS 0.5%
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
n/a · n/a

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References
http://lists.fedoraproject.org/pipermail/package-announce/2015-April/154574.htmlhttp://lists.fedoraproject.org/pipermail/package-announce/2015-April/154579.htmlhttp://lists.fedoraproject.org/pipermail/package-announce/2015-April/155198.htmlhttp://lists.nongnu.org/archive/html/qemu-devel/2015-03/msg06179.htmlhttp://lists.opensuse.org/opensuse-security-announce/2015-04/msg00014.htmlhttps://security.gentoo.org/glsa/201504-04https://support.citrix.com/article/CTX206006http://support.citrix.com/article/CTX201145http://www.debian.org/security/2015/dsa-3259http://www.securityfocus.com/bid/72577http://www.securitytracker.com/id/1031998http://www.ubuntu.com/usn/USN-2608-1