CVE-2016-9383

Severity: high (CVSS 8.8 v3.0)
Exploited in the wild: not listed in CISA KEV
EPSS: 0.5% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2017-01-23 · updated 2026-06-17
Weakness: CWE-20

Description

Xen, when running on a 64-bit hypervisor, allows local x86 guest OS users to modify arbitrary memory and consequently obtain sensitive information, cause a denial of service (host crash), or execute arbitrary code on the host by leveraging broken emulation of bit test instructions.

Affected products

Citrix XenServer: 6.0.2, 6.2.0, 6.5, 7.0
xen: all versions

References

http://www.securityfocus.com/bid/94474
http://www.securitytracker.com/id/1037346
http://xenbits.xen.org/xsa/advisory-195.html
https://security.gentoo.org/glsa/201612-56
https://support.citrix.com/article/CTX218775
http://www.securityfocus.com/bid/94474
http://www.securitytracker.com/id/1037346
http://xenbits.xen.org/xsa/advisory-195.html
https://security.gentoo.org/glsa/201612-56
https://support.citrix.com/article/CTX218775

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