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CVE-2015-4163

15
FAUCET Score

CVE-2015-4163 describes a denial-of-service vulnerability affecting Xen versions 4.2 through 4.5. A local guest domain can trigger a NULL pointer dereference by issuing a hypercall without proper grant table setup, leading to system instability. This vulnerability has a CVSS score of 4.9, indicating a low attack complexity and requiring local access to achieve a complete denial of service. There is no known exploit code available, nor is there evidence of active exploitation or significant community discussion surrounding this CVE.

Impacted Technologies

VendorProductVersion(s)CPE
4.2.0CPE matchmatch criteria
cpe:2.3:o:xen:xen:4.2.0:*:*:*:*:*:*:*
4.2.1CPE matchmatch criteria
cpe:2.3:o:xen:xen:4.2.1:*:*:*:*:*:*:*
4.2.2CPE matchmatch criteria
cpe:2.3:o:xen:xen:4.2.2:*:*:*:*:*:*:*
4.2.3CPE matchmatch criteria
cpe:2.3:o:xen:xen:4.2.3:*:*:*:*:*:*:*
4.3.0CPE matchmatch criteria
cpe:2.3:o:xen:xen:4.3.0:*:*:*:*:*:*:*

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
0.44%
Probability of exploitation in next 30 days
EPSS Percentile
36.0%
Percentile rank of EPSS score among Peer Group
As of 2026-07-28
Model: v2026.06.15
This CVE's current EPSS score of 0.0044 is in the 67th percentile among its peer group of 3,052 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 Advisories (1)

redhatCVE-2015-4163Moderate

xen: GNTTABOP_swap_grant_ref operation misbehavior (xsa-134)

Jun 11, 2015

References

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/msg00030.html
security.gentoo.org / glsa/201604-03
support.citrix.com / article/CTX206006
support.citrix.com / article/CTX201145
debian.org / security/2015/dsa-3286
securityfocus.com / bid/75141
securitytracker.com / id/1032568
xenbits.xen.org / xsa/advisory-134.html
Vendor Advisory