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CVE-2016-7093

20
FAUCET Score

CVE-2016-7093 is a critical vulnerability affecting Xen versions 4.5.3, 4.6.3, and 4.7.x, allowing a local HVM guest OS administrator to achieve host OS privileges by exploiting improper instruction pointer truncation during emulation. This vulnerability carries a high CVSS score of 8.2, indicating a local attack vector with low complexity, requiring high privileges, and resulting in complete compromise of confidentiality, integrity, and availability. While there is no known public exploit code (Metasploit, Nuclei, ExploitDB), the vulnerability has garnered significant community discussion and media coverage, suggesting awareness and potential for future exploitation. It is not currently listed on the CISA KEV catalog, nor is it on any hot lists.

Impacted Technologies

VendorProductVersion(s)CPE
4.5.3CPE matchmatch criteria
cpe:2.3:o:xen:xen:4.5.3:*:*:*:*:*:*:*
4.6.3CPE matchmatch criteria
cpe:2.3:o:xen:xen:4.6.3:*:*:*:*:*:*:*
4.7.0CPE matchmatch criteria
cpe:2.3:o:xen:xen:4.7.0:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 3.0

8.2HIGH

CVSS:3.0/AV:L/AC:L/PR:H/UI:N/S:C/C:H/I:H/A:H

Attack Vector
LOCAL
Attack Complexity
LOW
Privileges Required
HIGH
User Interaction
NONE
Scope
CHANGED
Confidentiality Impact
HIGH
Integrity Impact
HIGH
Availability Impact
HIGH
Exploitability Score
1.5
Impact Score
6.0
CvssVersion
3.0

Exploit Intelligence

EPSS Score
0.43%
Probability of exploitation in next 30 days
EPSS Percentile
34.8%
Percentile rank of EPSS score among Peer Group
As of 2026-07-27
Model: v2026.06.15
This CVE's current EPSS score of 0.0043 is in the 76th percentile among its peer group of 360 CVEs.

Social Chatter

No social media mentions found for this CVE.

The average CVE in this peer group has 0.0 Twitter, 0.1 Reddit, 0.2 Bluesky, 0.1 Mastodon, and 0.2 GitHub mentions.

Media Mentions

The average CVE in this peer group has 0.3 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.

Remediation

Vendor Patches (1)

redhatend of lifevia redhat_api
Product: Red Hat Enterprise Linux 5Fixed in: xen

Vendor Advisories (1)

redhatCVE-2016-7093Important

xen: x86: Mishandling of instruction pointer truncation during emulation

Sep 8, 2016

References

security.gentoo.org / glsa/201611-09
support.citrix.com / article/CTX216071
Third Party Advisory
securityfocus.com / bid/92865
securitytracker.com / id/1036752
Third Party AdvisoryVDB Entry
xenbits.xen.org / xsa/advisory-186.html
PatchVendor Advisory
xenbits.xen.org / xsa/xsa186-0001-x86-emulate-Correct-boundary-interactions-of-emulate.patch
PatchVendor Advisory