6.5

CVE-2018-15470: xen Uncontrolled Resource Consumption

Modified
AliasesALPINE-CVE-2018-15470UBUNTU-CVE-2018-15470DEBIAN-CVE-2018-15470
Published 17-08-2018Last modified 05-08-2024

Vulnerability summary

CVE-2018-15470 is a medium (CVSS 6.5) Uncontrolled Resource Consumption vulnerability in xen. EPSS estimates a 0.40% chance of exploitation in the next 30 days, higher than 34.2% of scored vulnerabilities.

Priority
Routine

Not severe (CVSS 6.5, local access); no exploitation reported by the 5 checked sources

Source freshness unavailable

How is this decided?
CVSS score
6.5/10
010
Medium · v3.0 (NVD)
EPSS score
0.40%
0%100%
Low · 0.00 pp in 30 days
KEVNot listedNot listed by any tracked catalog.
RansomwareNot flaggedNo ransomware use recorded.
Public exploits0No public exploits recorded

Advisory lineage

Upstream 0 · Downstream 5 · Related 3
DLA-1577-1DSA-4274-1OPENSUSE-SU-2024:11520-1SUSE-SU-2018:3490-1SUSE-SU-2018:4300-1

Timeline

  1. 17-08-2018
    PublishedVulnerability first disclosed.
  2. 05-08-2024
    Last modifiedVulnerability information updated.

Description

An issue was discovered in Xen through 4.11.x. The logic in oxenstored for handling writes depended on the order of evaluation of expressions making up a tuple. As indicated in section 7.7.3 "Operations on data structures" of the OCaml manual, the order of evaluation of subexpressions is not specified. In practice, different implementations behave differently. Thus, oxenstored may not enforce the configured quota-maxentity. This allows a malicious or buggy guest to write as many xenstore entries as it wishes, causing unbounded memory usage in oxenstored. This can lead to a system-wide DoS.

CVSS metrics

5 scores · 4 sources · 2 versions

EPSS trend

Probability

0.40%

Chance of exploitation in the next 30 days

Percentile

34%

Versus all other CVEs

30-day change

No change 0.00 pp

From 0.40% on 04-10-2026

04-10-202603-11-2026

Known exploited

Compare KEV catalogs
CISA KEV

Not in the CISA KEV catalog.

ENISA CNW

Not in the ENISA CNW catalog.

CIRCL

Not in the CIRCL catalog.

Public exploits

0 found

No public exploits indexed.

Weaknesses

CWE · root cause

Affected systems

Version check

Known conditions: local access, low-privilege account, no user interaction (CVSS vector). Other conditions: not stated in public data.

Alpine1 product
  • xen< 4.11.1-r0 | < 4.8.5-r0 | < 4.9.3-r0 | < 4.10.1-r3
Debian1 product
  • xen< 4.11.1~pre.20180911.5acdd26fdc+dfsg-2
Ubuntu1 product
  • xenAll versions (No fix recorded)
Xen1 product

4 vendors · 4 products

References

8 links