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CVE-2016-2271

18
FAUCET Score

CVE-2016-2271 describes a denial-of-service vulnerability affecting Xen 4.6.x and earlier when running on Intel or Cyrix CPUs. Local HVM guest users can exploit this flaw by manipulating non-canonical RIP values, leading to a guest crash. Rated Medium severity with a CVSS score of 5.5, this vulnerability requires local access and has a high impact on availability. There is no known active exploitation, public exploit code (Metasploit, Nuclei, ExploitDB), or significant community discussion or media coverage surrounding this CVE.

Impacted Technologies

VendorProductVersion(s)CPE
4.6.0CPE matchmatch criteria
cpe:2.3:o:xen:xen:4.6.0:*:*:*:*:*:*:*
4.6.1CPE matchmatch criteria
cpe:2.3:o:xen:xen:4.6.1:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 3.0

5.5MEDIUM

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

Attack Vector
LOCAL
Attack Complexity
LOW
Privileges Required
LOW
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
NONE
Integrity Impact
NONE
Availability Impact
HIGH
Exploitability Score
1.8
Impact Score
3.6
CvssVersion
3.0

Exploit Intelligence

EPSS Score
0.39%
Probability of exploitation in next 30 days
EPSS Percentile
31.7%
Percentile rank of EPSS score among Peer Group
As of 2026-07-24
Model: v2026.06.15
This CVE's current EPSS score of 0.0039 is in the 87th percentile among its peer group of 15,903 CVEs.

Social Chatter

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

Media Mentions

No media coverage found for this CVE.

The average CVE in this peer group has 0.1 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-2016-2271Low

xen: guest user mode may crash guest with non-canonical RIP (XSA-170)

Feb 17, 2016

References

lists.fedoraproject.org / pipermail/package-announce/2016-February/177990.html
lists.fedoraproject.org / pipermail/package-announce/2016-March/178518.html
security.gentoo.org / glsa/201604-03
support.citrix.com / article/CTX209443
debian.org / security/2016/dsa-3519
securitytracker.com / id/1035043
xenbits.xen.org / xsa/advisory-170.html
PatchVendor Advisory