CVE-2015-2756
8.1 High
AI Score
Confidence
High
4.9 Medium
CVSS2
Access Vector
LOCAL
Access Complexity
LOW
Authentication
NONE
Confidentiality Impact
NONE
Integrity Impact
NONE
Availability Impact
COMPLETE
AV:L/AC:L/Au:N/C:N/I:N/A:C
0.001 Low
EPSS
Percentile
27.0%
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.
References
lists.fedoraproject.org/pipermail/package-announce/2015-April/154574.html
lists.fedoraproject.org/pipermail/package-announce/2015-April/154579.html
lists.fedoraproject.org/pipermail/package-announce/2015-April/155198.html
lists.nongnu.org/archive/html/qemu-devel/2015-03/msg06179.html
lists.opensuse.org/opensuse-security-announce/2015-04/msg00014.html
support.citrix.com/article/CTX201145
www.debian.org/security/2015/dsa-3259
www.securityfocus.com/bid/72577
www.securitytracker.com/id/1031998
www.ubuntu.com/usn/USN-2608-1
xenbits.xen.org/xsa/advisory-126.html
security.gentoo.org/glsa/201504-04
support.citrix.com/article/CTX206006
Related
8.1 High
AI Score
Confidence
High
4.9 Medium
CVSS2
Access Vector
LOCAL
Access Complexity
LOW
Authentication
NONE
Confidentiality Impact
NONE
Integrity Impact
NONE
Availability Impact
COMPLETE
AV:L/AC:L/Au:N/C:N/I:N/A:C
0.001 Low
EPSS
Percentile
27.0%