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CVE-2015-4104

21
FAUCET Score

CVE-2015-4104 describes a denial-of-service vulnerability affecting Xen versions 3.3.x through 4.5.x. Local x86 HVM guest users can exploit improper restrictions on PCI MSI mask bits, leading to unexpected interrupts and host crashes. With a CVSS score of 7.8 (High), this vulnerability has a network attack vector and low attack complexity, resulting in a complete availability impact. There is no evidence of active exploitation, public exploit code, or significant community discussion surrounding this CVE.

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

7.8HIGH

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

Confidentiality Impact
NONE
Integrity Impact
NONE
Availability Impact
COMPLETE
Access Vector
NETWORK
Access Complexity
LOW
Authentication
NONE
Exploitability Score
10.0
Impact Score
6.9
CvssVersion
2.0

Exploit Intelligence

EPSS Score
3.43%
Probability of exploitation in next 30 days
EPSS Percentile
87.7%
Percentile rank of EPSS score among Peer Group
As of 2026-07-27
Model: v2026.06.15
This CVE's current EPSS score of 0.0343 is in the 78th percentile among its peer group of 51,551 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, 0.1 Mastodon, and 0.4 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)

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

Vendor Advisories (1)

redhatCVE-2015-4104Low

xen: PCI MSI mask bits inadvertently exposed to guests (xsa-129)

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/74950
securitytracker.com / id/1032464
ubuntu.com / usn/USN-2630-1
xenbits.xen.org / xsa/advisory-129.html
Vendor Advisory