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CVE-2017-15594

27
FAUCET Score

CVE-2017-15594 describes a high-severity vulnerability in Xen through version 4.9.x, where x86 SVM PV guest OS users can trigger a hypervisor crash (denial of service) or escalate privileges due to mishandled IDT settings during CPU hotplugging. This local attack requires low privileges and has a high impact on confidentiality, integrity, and availability, as reflected by its CVSS score of 8.8. Despite its severity, 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
<= 4.9.0CPE matchmatch criteria
cpe:2.3:o:xen:xen:*:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 3.0

8.8HIGH

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

Attack Vector
LOCAL
Attack Complexity
LOW
Privileges Required
LOW
User Interaction
NONE
Scope
CHANGED
Confidentiality Impact
HIGH
Integrity Impact
HIGH
Availability Impact
HIGH
Exploitability Score
2.0
Impact Score
6.0
CvssVersion
3.0

Exploit Intelligence

EPSS Score
0.38%
Probability of exploitation in next 30 days
EPSS Percentile
30.9%
Percentile rank of EPSS score among Peer Group
As of 2026-07-28
Model: v2026.06.15
This CVE's current EPSS score of 0.0038 is in the 70th percentile among its peer group of 17,070 CVEs.

Social Chatter

The average CVE in this peer group has 0.0 Twitter, 0.1 Reddit, 0.2 Bluesky, 0.1 Mastodon, and 0.2 GitHub mentions.

Media Mentions

No media coverage found for this CVE.

The average CVE in this peer group has 0.3 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.

Remediation

Vendor Patches (1)

redhatend of lifevia redhat_api
Product: Red Hat Enterprise Linux 5Fixed in: xen

Vendor Advisories (1)

redhatCVE-2017-15594Important

xen: x86: Incorrect handling of IST settings during CPU hotplug (XSA-244)

Oct 12, 2017

References

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-244.html
MitigationPatchVendor Advisory
securitytracker.com / id/1039568
Third Party AdvisoryVDB Entry