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CVE-2011-1166

20
FAUCET Score

CVE-2011-1166 describes a denial-of-service vulnerability in Xen, potentially affecting versions prior to 4.0.2. A local 64-bit PV guest can crash the host by attempting user-mode execution without proper user-mode pagetables. This vulnerability has a CVSS score of 5.5, indicating a medium severity, with an adjacent attack vector, low attack complexity, and a complete availability impact. There is no evidence of active exploitation, public exploit code (Metasploit, Nuclei, ExploitDB), or significant community discussion surrounding this CVE.

Impacted Technologies

VendorProductVersion(s)CPE
<= 4.0.1CPE matchmatch criteria
cpe:2.3:o:xen:xen:*:*:*:*:*:*:*:*
3.0.2CPE matchmatch criteria
cpe:2.3:o:xen:xen:3.0.2:*:*:*:*:*:*:*
3.0.3CPE matchmatch criteria
cpe:2.3:o:xen:xen:3.0.3:*:*:*:*:*:*:*
3.0.4CPE matchmatch criteria
cpe:2.3:o:xen:xen:3.0.4:*:*:*:*:*:*:*
3.1.3CPE matchmatch criteria
cpe:2.3:o:xen:xen:3.1.3:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 2.0

5.5MEDIUM

AV:A/AC:L/Au:S/C:N/I:N/A:C

Confidentiality Impact
NONE
Integrity Impact
NONE
Availability Impact
COMPLETE
Access Vector
ADJACENT_NETWORK
Access Complexity
LOW
Authentication
SINGLE
Exploitability Score
5.1
Impact Score
6.9
CvssVersion
2.0

Exploit Intelligence

EPSS Score
0.67%
Probability of exploitation in next 30 days
EPSS Percentile
48.1%
Percentile rank of EPSS score among Peer Group
As of 2026-07-27
Model: v2026.06.15
This CVE's current EPSS score of 0.0067 is in the 78th percentile among its peer group of 314 CVEs.

Social Chatter

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

Patch Available

Vendor Patches (1)

redhatpatch availablevia redhat_api
Product: Red Hat Enterprise Linux 5Fixed in: kernel-0:2.6.18-238.12.1.el5
View patch

Vendor Advisories (1)

redhatCVE-2011-1166Moderate

kernel: xen: x86_64: fix error checking in arch_set_info_guest()

Mar 14, 2011

References

downloads.avaya.com / css/P8/documents/100145416
rhn.redhat.com / errata/RHSA-2011-0833.html
wiki.xen.org / wiki/Security_Announcements
PatchVendor Advisory