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CVE-2018-15470

22
FAUCET Score

CVE-2018-15470 is a denial-of-service vulnerability affecting Xen through version 4.11.x, stemming from an unspecified order of evaluation in OCaml expressions within oxenstored. This allows a malicious guest to bypass configured quota limits, leading to unbounded memory usage and a system-wide DoS. The vulnerability has a CVSS score of 6.5 (Medium), indicating a local attack vector with low complexity and a high impact on availability. There is no evidence of active exploitation, public exploit code, or significant community discussion surrounding this CVE.

Impacted Technologies

VendorProductVersion(s)CPE
<= 4.11.0CPE 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
0.40%
Probability of exploitation in next 30 days
EPSS Percentile
32.6%
Percentile rank of EPSS score among Peer Group
As of 2026-07-27
Model: v2026.06.15
This CVE's current EPSS score of 0.0040 is in the 88th percentile among its peer group of 15,940 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-2018-15470Moderate

xen: oxenstored does not apply quota-maxentity (XSA-272)

Aug 14, 2018

References

lists.debian.org / debian-lts-announce/2018/11/msg00013.html
security.gentoo.org / glsa/201810-06
Third Party Advisory
xenbits.xen.org / xsa/advisory-272.html
Vendor Advisory