CVE-2016-9637

Severity: high (CVSS 7.5 v3.0)
Exploited in the wild: not listed in CISA KEV
EPSS: 0.4% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2017-02-17 · updated 2026-06-17
Weakness: CWE-264

Description

The (1) ioport_read and (2) ioport_write functions in Xen, when qemu is used as a device model within Xen, might allow local x86 HVM guest OS administrators to gain qemu process privileges via vectors involving an out-of-range ioport access.

Affected products

Citrix XenServer: 6.0.2, 6.2.0-sp1, 6.5-sp1, 7.0

References

http://rhn.redhat.com/errata/RHSA-2016-2963.html
http://www.securityfocus.com/bid/94699
http://www.securitytracker.com/id/1037397
http://xenbits.xen.org/xsa/advisory-199.html
https://lists.debian.org/debian-lts-announce/2018/02/msg00005.html
https://security.gentoo.org/glsa/201612-56
https://support.citrix.com/article/CTX219136
http://rhn.redhat.com/errata/RHSA-2016-2963.html
http://www.securityfocus.com/bid/94699
http://www.securitytracker.com/id/1037397
http://xenbits.xen.org/xsa/advisory-199.html
https://lists.debian.org/debian-lts-announce/2018/02/msg00005.html

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