CVE-2018-15688

HIGHNVD 8.88.8—
EchelonGraph scoreMEDIUM confidence

Score 8.8 from GitHub Security Advisory (severity: HIGH) published 2022-05-13. NVD baseline CVSS 8.8; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: epss, ghsa, nvd
8.8EG
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS PROB: 2%CVSS: 8.8Exploit: None knownExposed: 0

A fix is available — apply it.

A buffer overflow vulnerability in the dhcp6 client of systemd allows a malicious dhcp6 server to overwrite heap memory in systemd-networkd. Affected releases are systemd: versions up to and including 239.

CVSS v3
8.8
EG Score
8.8(medium)
EG Risk
40(Track)
EG Risk 40/100SSVC: Track

EG Risk is EchelonGraph's 0–100 priority score: it fuses intrinsic severity with real-world exploitation and automatability so you can rank equal-severity CVEs and fix the most dangerous first. Higher = act sooner. Distinct from the 0–10 EG Score (severity).

How it’s computed
Severity88% × 45%
Exploitation2% × 40%
Automatability0% × 15%
Action: Routine — remediate on your standard cadence.
EPSS PROB
2%
EPSS %ILE
75%
KEV
Not listed

Published

October 26, 2018

Last Modified

June 9, 2025

Advisory Details (7)

Auto-updated Aug 12, 2026
Patch available. Sources: redhat, github_pr.
generic

SecurityFocus

http://www.securityfocus.com/bid/105745
generic

systemd: Multiple vulnerabilities (GLSA 201810-10) — Gentoo security

https://security.gentoo.org/glsa/201810-10
generic Patch Available

[SECURITY] [DLA 1580-1] systemd security update

https://lists.debian.org/debian-lts-announce/2018/11/msg00017.html
github_pr

dhcp6 packet size calculation fixes

Fix merged in systemd/systemd PR #10518 on 2018-10-25 — awaiting tagged release

https://github.com/systemd/systemd/pull/10518
redhat Patch Available

Affected: Red Hat Enterprise Linux 7.

https://access.redhat.com/errata/RHSA-2019:0049
redhat Patch Available

Affected: Red Hat Enterprise Linux 7.

https://access.redhat.com/errata/RHSA-2018:3665
redhat Patch Available
https://access.redhat.com/errata/RHBA-2019:0327

Vendor Advisories for CVE-2018-15688(2)

These vendors published their own advisory mentioning this CVE — often with vendor-specific remediation steps + affected product lists not in NVD.

Patch Availability(4)

Vendor / EcosystemFixed in / PatchReleasedSource
ubuntunetwork-manager-dev (1.10.6-2ubuntu1.1) @ bionic2026-05-28ubuntu
ubuntusystemd (239-7ubuntu10.1) @ cosmic2026-05-28ubuntu
redhatsystemd-0:219-62.el7_6.22019-01-14redhat
redhatNetworkManager-1:1.12.0-8.el7_62018-11-27redhat

Patches are aggregated from vendor advisories (Red Hat, Microsoft, Cisco, GitHub) and package ecosystems (OSV, GHSA). Multiple rows for the same upstream release have been deduplicated.

Affected Packages

(9 across 5 ecosystems)
Debian:11(2)
PackageVulnerable rangeFixed inDependents
network-manager—1.14.4-2—
systemd—239-11—
Debian:12(2)
PackageVulnerable rangeFixed inDependents
network-manager—1.14.4-2—
systemd—239-11—
Debian:13(2)
PackageVulnerable rangeFixed inDependents
network-manager—1.14.4-2—
systemd—239-11—
Debian:14(2)
PackageVulnerable rangeFixed inDependents
network-manager—1.14.4-2—
systemd—239-11—
Debian:8(1)
PackageVulnerable rangeFixed inDependents
systemd215-17 ... 215-17+deb8u7 (8 versions)215-17+deb8u8—

Weakness Classification(1)

MITRE Common Weakness Enumeration — the root-cause categories this CVE belongs to.

Additional Vendor Advisories

(3)

Vendors that published advisories for this CVE beyond the curated set above. Broader coverage but minimal per-row detail — click through for the original advisory.

Data Freshness Timeline

(refreshed 6× in last 7d / 26× in last 30d)

Each row is a source pipeline that fetched or updated this CVE on that date, with what changed. For example, "NVD update" means NVD published or revised its analysis for this CVE; "MITRE cvelistV5" means we ingested or refreshed it from the CNA feed. Most recent first.

Showing the most recent 100 of 126 total refreshes for this CVE.

  1. 2026-08-25 13:44 UTCEPSS rescore
  2. 2026-08-23 00:14 UTCEPSS rescore
  3. 2026-08-22 06:37 UTCOSV refresh
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  7. 2026-07-23 01:33 UTCEG score recompute
  8. 2026-07-22 22:14 UTCEG score recompute
  9. 2026-07-22 14:04 UTCEPSS rescore
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  11. 2026-07-21 03:17 UTCOSV refresh
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Frequently asked(5)

What is CVE-2018-15688?
CVE-2018-15688 is a high vulnerability published on October 26, 2018. A buffer overflow vulnerability in the dhcp6 client of systemd allows a malicious dhcp6 server to overwrite heap memory in systemd-networkd. Affected releases are systemd: versions up to and including 239.
When was CVE-2018-15688 disclosed?
CVE-2018-15688 was first published in the National Vulnerability Database on October 26, 2018, with the most recent update on June 9, 2025. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2018-15688 actively exploited?
CVE-2018-15688 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 2% probability of exploitation in the next 30 days, which ranks it in the top 25.1% of all scored CVEs.
What is the CVSS score of CVE-2018-15688?
CVE-2018-15688 has a CVSS v3 base score of 8.8 (NVD).
How do I remediate CVE-2018-15688?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2018-15688, EchelonGraph cross-links them in the Vendor Advisories panel below — those typically contain the canonical remediation steps, fixed version numbers, and any vendor-specific mitigations.

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