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CVE-2011-1936

18
FAUCET Score

CVE-2011-1936 describes a denial-of-service vulnerability in Xen, specifically affecting x86 Intel processors with the VMX virtualization extension enabled. The flaw arises from improper handling of cpuid instruction emulation during VM exits, allowing local guest users to crash the guest system. With a CVSS score of 4.6 (AV:A/AC:H/Au:N/C:N/I:N/A:C), this vulnerability has a medium attack complexity and requires adjacent network access, leading to a complete availability impact. There is no evidence of active exploitation, public exploit code (Metasploit, Nuclei, ExploitDB), or significant community discussion or media coverage surrounding this CVE.

Impacted Technologies

VendorProductVersion(s)CPE
Range not provided by sourceCPE matchmatch criteria
cpe:2.3:o:xen:xen:-:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 2.0

4.6MEDIUM

AV:A/AC:H/Au:N/C:N/I:N/A:C

Confidentiality Impact
NONE
Integrity Impact
NONE
Availability Impact
COMPLETE
Access Vector
ADJACENT_NETWORK
Access Complexity
HIGH
Authentication
NONE
Exploitability Score
3.2
Impact Score
6.9
CvssVersion
2.0

Exploit Intelligence

EPSS Score
0.47%
Probability of exploitation in next 30 days
EPSS Percentile
38.1%
Percentile rank of EPSS score among Peer Group
As of 2026-07-27
Model: v2026.06.15
This CVE's current EPSS score of 0.0047 is in the 89th percentile among its peer group of 1,749 CVEs.

Social Chatter

The average CVE in this peer group has 0.0 Twitter, 0.0 Reddit, 0.0 Bluesky, 0.0 Mastodon, and 0.0 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-0:2.6.18-238.19.1.el5
View patch

Vendor Advisories (1)

redhatCVE-2011-1936Moderate

kernel: xen: vmx: insecure cpuid vmexit

Jul 7, 2011

References

rhn.redhat.com / errata/RHSA-2011-0927.html
openwall.com / lists/oss-security/2011/07/07/3