CVE-2016-9383
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…
Does this matter?
High impact if exploited, but EPSS currently rates exploitation as unlikely (0.51%). Schedule it in the normal patch cycle and watch for a rise in EPSS or a public exploit.
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.
- CVSS 3.0
- 8.8 HIGHCVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H
- EPSS
- 0.51% probability · 43th percentile
- Public exploits
- None in Exploit-DB
- CISA KEV
- Not listed
- Weakness
- CWE-20
- Affected
- xen/xen · citrix/xenserver
- Source
- cve@mitre.org
EPSS 0.5% since 27 October 2026; no change recorded yet. Points are recorded when the score first appears and whenever it moves by a percentage point or more.
References
- http://www.securityfocus.com/bid/94474Third Party Advisory, VDB Entry
- http://www.securitytracker.com/id/1037346Third Party Advisory, VDB Entry
- http://xenbits.xen.org/xsa/advisory-195.htmlPatch, Vendor Advisory
- https://security.gentoo.org/glsa/201612-56
- https://support.citrix.com/article/CTX218775Patch, Third Party Advisory
- http://www.securityfocus.com/bid/94474Third Party Advisory, VDB Entry
- http://www.securitytracker.com/id/1037346Third Party Advisory, VDB Entry
- http://xenbits.xen.org/xsa/advisory-195.htmlPatch, Vendor Advisory
- https://security.gentoo.org/glsa/201612-56
- https://support.citrix.com/article/CTX218775Patch, Third Party Advisory
Source: NVD record, EPSS from FIRST.org, KEV from CISA, exploits from Exploit-DB. Refreshed daily. Download this record as JSON.