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CVE-2014-4021

16
FAUCET Score

CVE-2014-4021 describes a memory cleaning vulnerability in Xen versions 3.2.x through 4.4.x, allowing local guest OS users to potentially access sensitive information from memory pages recovered from other guests. This vulnerability has a low severity CVSS score of 2.7, indicating a low attack complexity and requiring authentication, with the primary impact being a partial loss of confidentiality. There is no evidence of active exploitation, publicly available exploit code (Metasploit, Nuclei, ExploitDB), or significant community discussion or media coverage surrounding this CVE.

Impacted Technologies

VendorProductVersion(s)CPE
3.2.0CPE matchmatch criteria
cpe:2.3:o:xen:xen:3.2.0:*:*:*:*:*:*:*
3.2.1CPE matchmatch criteria
cpe:2.3:o:xen:xen:3.2.1:*:*:*:*:*:*:*
3.2.2CPE matchmatch criteria
cpe:2.3:o:xen:xen:3.2.2:*:*:*:*:*:*:*
3.2.3CPE matchmatch criteria
cpe:2.3:o:xen:xen:3.2.3:*:*:*:*:*:*:*
4.0.0CPE matchmatch criteria
cpe:2.3:o:xen:xen:4.0.0:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 2.0

2.7LOW

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

Confidentiality Impact
PARTIAL
Integrity Impact
NONE
Availability Impact
NONE
Access Vector
ADJACENT_NETWORK
Access Complexity
LOW
Authentication
SINGLE
Exploitability Score
5.1
Impact Score
2.9
CvssVersion
2.0

Exploit Intelligence

EPSS Score
0.68%
Probability of exploitation in next 30 days
EPSS Percentile
48.9%
Percentile rank of EPSS score among Peer Group
As of 2026-07-28
Model: v2026.06.15
This CVE's current EPSS score of 0.0068 is in the 87th percentile among its peer group of 85 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-0:2.6.18-371.11.1.el5
View patch

Vendor Advisories (1)

redhatCVE-2014-4021Moderate

xen: Hypervisor heap contents leaked to guests (xsa-100)

Jun 17, 2014

References

linux.oracle.com / errata/ELSA-2014-0926-1.html
linux.oracle.com / errata/ELSA-2014-0926.html
lists.fedoraproject.org / pipermail/package-announce/2014-July/135068.html
lists.fedoraproject.org / pipermail/package-announce/2014-July/135071.html
lists.opensuse.org / opensuse-security-announce/2014-10/msg00002.html
lists.opensuse.org / opensuse-security-announce/2014-10/msg00003.html
secunia.com / advisories/59208
secunia.com / advisories/60027
secunia.com / advisories/60130
secunia.com / advisories/60471
security.gentoo.org / glsa/glsa-201407-03.xml
support.citrix.com / article/CTX140984
debian.org / security/2014/dsa-3006
securityfocus.com / bid/68070
securitytracker.com / id/1030442
xenbits.xen.org / xsa/advisory-100.html
PatchVendor Advisory