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CVE-2015-4103

15
FAUCET Score

CVE-2015-4103 describes a denial-of-service vulnerability in Xen versions 3.3.x through 4.5.x. Local x86 HVM guest administrators can exploit improper write access to the host MSI message data field, specifically through qemu and spanning multiple fields, to cause host interrupt handling confusion. This vulnerability has a CVSS score of 4.9 (medium severity), indicating a local attack vector with low complexity and a high impact on availability. There is no evidence of active exploitation, public exploit code (Metasploit, Nuclei, ExploitDB), or significant community discussion or media coverage.

Impacted Technologies

VendorProductVersion(s)CPE
3.3.0CPE matchmatch criteria
cpe:2.3:o:xen:xen:3.3.0:*:*:*:*:*:*:*
3.3.1CPE matchmatch criteria
cpe:2.3:o:xen:xen:3.3.1:*:*:*:*:*:*:*
3.3.2CPE matchmatch criteria
cpe:2.3:o:xen:xen:3.3.2:*:*:*:*:*:*:*
3.4.0CPE matchmatch criteria
cpe:2.3:o:xen:xen:3.4.0:*:*:*:*:*:*:*
3.4.1CPE matchmatch criteria
cpe:2.3:o:xen:xen:3.4.1:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 2.0

4.9MEDIUM

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

Confidentiality Impact
NONE
Integrity Impact
NONE
Availability Impact
COMPLETE
Access Vector
LOCAL
Access Complexity
LOW
Authentication
NONE
Exploitability Score
3.9
Impact Score
6.9
CvssVersion
2.0

Exploit Intelligence

EPSS Score
0.45%
Probability of exploitation in next 30 days
EPSS Percentile
36.8%
Percentile rank of EPSS score among Peer Group
As of 2026-07-27
Model: v2026.06.15
This CVE's current EPSS score of 0.0045 is in the 69th percentile among its peer group of 3,050 CVEs.

Social Chatter

No social media mentions found for this CVE.

The average CVE in this peer group has 0.0 Twitter, 0.0 Reddit, 0.1 Bluesky, 0.0 Mastodon, and 0.4 GitHub mentions.

Media Mentions

No media coverage found for this CVE.

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

Remediation

Vendor Patches (1)

redhatno patchvia redhat_api
Product: Red Hat Enterprise Linux 5Fixed in: xen

Vendor Advisories (1)

redhatCVE-2015-4103Low

xen: potential unintended writes to host MSI message data field via qemu (xsa-128)

Jun 2, 2015

References

lists.fedoraproject.org / pipermail/package-announce/2015-June/160154.html
lists.fedoraproject.org / pipermail/package-announce/2015-June/160171.html
lists.fedoraproject.org / pipermail/package-announce/2015-June/160685.html
lists.opensuse.org / opensuse-security-announce/2015-06/msg00004.html
lists.opensuse.org / opensuse-security-announce/2015-06/msg00007.html
lists.opensuse.org / opensuse-security-announce/2015-06/msg00029.html
lists.opensuse.org / opensuse-security-announce/2015-06/msg00030.html
security.gentoo.org / glsa/201604-03
support.citrix.com / article/CTX206006
support.citrix.com / article/CTX201145
debian.org / security/2015/dsa-3284
debian.org / security/2015/dsa-3286
securityfocus.com / bid/74947
securitytracker.com / id/1032456
ubuntu.com / usn/USN-2630-1
xenbits.xen.org / xsa/advisory-128.html
Vendor Advisory