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CVE-2017-15593

22
FAUCET Score

CVE-2017-15593 describes a memory leak vulnerability in Xen through version 4.9.x, specifically affecting x86 PV guest operating systems. An authenticated guest user can exploit this flaw to cause a denial of service on the host system due to mishandled reference counts. This vulnerability has a CVSS score of 6.5 (Medium), indicating a local attack vector with low complexity, requiring low privileges, and leading to high availability impact. There is currently no evidence of active exploitation, public exploit code (Metasploit, Nuclei, ExploitDB), or significant community discussion surrounding this CVE.

Impacted Technologies

VendorProductVersion(s)CPE
<= 4.9.0CPE matchmatch criteria
cpe:2.3:o:xen:xen:*:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 3.0

6.5MEDIUM

CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:C/C:N/I:N/A:H

Attack Vector
LOCAL
Attack Complexity
LOW
Privileges Required
LOW
User Interaction
NONE
Scope
CHANGED
Confidentiality Impact
NONE
Integrity Impact
NONE
Availability Impact
HIGH
Exploitability Score
2.0
Impact Score
4.0
CvssVersion
3.0

Exploit Intelligence

EPSS Score
0.39%
Probability of exploitation in next 30 days
EPSS Percentile
31.7%
Percentile rank of EPSS score among Peer Group
As of 2026-07-27
Model: v2026.06.15
This CVE's current EPSS score of 0.0039 is in the 87th percentile among its peer group of 15,938 CVEs.

Social Chatter

The average CVE in this peer group has 0.0 Twitter, 0.0 Reddit, 0.0 Bluesky, 0.0 Mastodon, and 0.1 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 Advisories (1)

redhatCVE-2017-15593Moderate

xen: page type reference leak on x86 (XSA-242)

Oct 12, 2017

References

lists.debian.org / debian-lts-announce/2017/11/msg00027.html
lists.debian.org / debian-lts-announce/2018/10/msg00021.html
security.gentoo.org / glsa/201801-14
support.citrix.com / article/CTX228867
debian.org / security/2017/dsa-4050
xenbits.xen.org / xsa/advisory-242.html
MitigationPatchVendor Advisory
securitytracker.com / id/1039568
Third Party AdvisoryVDB Entry