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: 1.7%CVSS: 8.8Exploit: None knownExposed services: Not assessed

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
8.8HIGHmedium confidence
EG Risk
40
EG Risk 40/100CISA SSVC

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%
CISA SSVC: Track at low or medium mission impact; Track* at high (mission-essential systems).
Action: A fix is available. Apply it within your standard update timelines.
EPSS PROB
1.7%
EPSS %ILE
76th
KEV
Not listed

CISA SSVCTrack at low or medium mission impact; Track* at high (mission-essential systems).

A fix is available. Apply it within your standard update timelines.

Exploitation none (CISA Vulnrichment) · Automatable no (CISA Vulnrichment) · Technical impact total (CISA Vulnrichment). Mission impact is CISA's Mission & Well-being decision point, and only you can judge it: high means the affected system is essential to your organisation's mission, or its compromise could cause irreversible harm to people. CISA's decision table

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
genericMentions a patch (unverified)

[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
redhatMentions a patch (unverified)

Affected: Red Hat Enterprise Linux 7.

https://access.redhat.com/errata/RHSA-2019:0049
redhatMentions a patch (unverified)

Affected: Red Hat Enterprise Linux 7.

https://access.redhat.com/errata/RHSA-2018:3665
redhatMentions a patch (unverified)
https://access.redhat.com/errata/RHBA-2019:0327

Vendor Advisories for CVE-2018-15688(3)

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 / EcosystemFix (by version range) / 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 rangeFix by version rangeDependents
network-manager—
  • every version up to 1.14.4-2: fixed in 1.14.4-2
—
systemd—
  • every version up to 239-11: fixed in 239-11
—
Debian:12(2)
PackageVulnerable rangeFix by version rangeDependents
network-manager—
  • every version up to 1.14.4-2: fixed in 1.14.4-2
—
systemd—
  • every version up to 239-11: fixed in 239-11
—
Debian:13(2)
PackageVulnerable rangeFix by version rangeDependents
network-manager—
  • every version up to 1.14.4-2: fixed in 1.14.4-2
—
systemd—
  • every version up to 239-11: fixed in 239-11
—
Debian:14(2)
PackageVulnerable rangeFix by version rangeDependents
network-manager—
  • every version up to 1.14.4-2: fixed in 1.14.4-2
—
systemd—
  • every version up to 239-11: fixed in 239-11
—
Debian:8(1)
PackageVulnerable rangeFix by version rangeDependents
systemd215-17 ... 215-17+deb8u7 (8 versions)
  • every version up to 215-17+deb8u8: fixed in 215-17+deb8u8
—

Weakness Classification(1)

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

Additional Vendor Advisories

(2)

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 7× in last 7d / 28× 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 169 total refreshes for this CVE.

  1. 2026-10-09 20:02 UTCEPSS rescore
  2. 2026-10-08 16:36 UTCEPSS rescore
  3. 2026-10-07 23:41 UTCEPSS rescore
  4. 2026-10-06 15:12 UTCEPSS rescore
  5. 2026-10-05 17:39 UTCEPSS rescore
  6. 2026-10-04 23:18 UTCEPSS rescore
  7. 2026-10-03 14:21 UTCEPSS rescore
  8. 2026-09-30 14:59 UTCEPSS rescore
  9. 2026-09-30 09:55 UTCEG score recompute
  10. 2026-09-28 17:12 UTCOSV refresh
  11. 2026-09-28 13:45 UTCEPSS rescore
  12. 2026-09-27 13:40 UTCEPSS rescore
  13. 2026-09-27 13:40 UTCEPSS rescore
  14. 2026-09-26 15:53 UTCEPSS rescore
  15. 2026-09-26 00:19 UTCEPSS rescore
  16. 2026-09-24 13:59 UTCEPSS rescore
  17. 2026-09-23 13:42 UTCEPSS rescore
  18. 2026-09-21 20:27 UTCEPSS rescore
  19. 2026-09-20 20:10 UTCEPSS rescore
  20. 2026-09-19 15:36 UTCEPSS rescore
  21. 2026-09-18 19:22 UTCEPSS rescore
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  23. 2026-09-16 14:03 UTCEPSS rescore
  24. 2026-09-16 05:06 UTCEPSS rescore
  25. 2026-09-15 03:05 UTCEPSS rescore
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  1. 2026-09-13 16:42 UTCEPSS rescore
  2. 2026-09-12 14:56 UTCEPSS rescore
  3. 2026-09-11 14:47 UTCEPSS rescore
  4. 2026-09-10 09:27 UTCEPSS rescore
  5. 2026-09-08 21:34 UTCOSV refresh
  6. 2026-09-07 15:57 UTCEPSS rescore
  7. 2026-09-06 13:43 UTCEPSS rescore
  8. 2026-09-05 15:24 UTCEPSS rescore
  9. 2026-09-04 13:56 UTCEPSS rescore
  10. 2026-09-04 05:02 UTCEPSS rescore
  11. 2026-09-02 14:07 UTCEPSS rescore
  12. 2026-09-02 14:07 UTCEPSS rescore
  13. 2026-09-01 13:49 UTCEPSS rescore
  14. 2026-09-01 03:31 UTCEPSS rescore
  15. 2026-08-30 19:13 UTCEPSS rescore
  16. 2026-08-28 21:36 UTCEPSS rescore
  17. 2026-08-27 14:21 UTCEPSS rescore
  18. 2026-08-26 14:41 UTCEPSS rescore
  19. 2026-08-25 13:44 UTCEPSS rescore
  20. 2026-08-23 00:14 UTCEPSS rescore
  21. 2026-08-22 06:37 UTCOSV refresh
  22. 2026-08-21 23:44 UTCEPSS rescore
  23. 2026-08-20 22:51 UTCEPSS rescore
  24. 2026-08-19 17:00 UTCEPSS rescore
  25. 2026-08-18 13:43 UTCEPSS rescore
  26. 2026-08-17 13:42 UTCEPSS rescore
  27. 2026-08-16 14:51 UTCEPSS rescore
  28. 2026-08-16 02:10 UTCEPSS rescore
  29. 2026-08-15 01:26 UTCEPSS rescore
  30. 2026-08-13 21:56 UTCEPSS rescore
  31. 2026-08-12 13:46 UTCEPSS rescore
  32. 2026-08-11 13:36 UTCEPSS rescore
  33. 2026-08-09 13:42 UTCEPSS rescore
  34. 2026-08-08 16:32 UTCEPSS rescore
  35. 2026-08-07 16:22 UTCEPSS rescore
  36. 2026-08-06 13:42 UTCEPSS rescore
  37. 2026-08-06 13:42 UTCEPSS rescore
  38. 2026-08-06 09:45 UTCOSV refresh
  39. 2026-08-04 15:05 UTCEPSS rescore
  40. 2026-08-02 02:23 UTCEPSS rescore
  41. 2026-08-01 04:12 UTCEPSS rescore
  42. 2026-07-30 16:24 UTCEPSS rescore
  43. 2026-07-30 01:27 UTCEPSS rescore
  44. 2026-07-28 15:32 UTCEPSS rescore
  45. 2026-07-26 14:51 UTCEPSS rescore
  46. 2026-07-26 14:51 UTCEPSS rescore
  47. 2026-07-24 14:14 UTCEPSS rescore
  48. 2026-07-23 14:15 UTCEPSS rescore
  49. 2026-07-23 14:15 UTCEPSS rescore
  50. 2026-07-23 01:33 UTCEG score recompute
  51. 2026-07-22 22:14 UTCEG score recompute
  52. 2026-07-22 14:04 UTCEPSS rescore
  53. 2026-07-21 15:21 UTCEPSS rescore
  54. 2026-07-21 03:17 UTCOSV refresh
  55. 2026-07-20 17:04 UTCEPSS rescore
  56. 2026-07-20 17:04 UTCEPSS rescore
  57. 2026-07-19 14:28 UTCEPSS rescore
  58. 2026-07-19 02:26 UTCEPSS rescore
  59. 2026-07-19 02:26 UTCEPSS rescore
  60. 2026-07-16 16:59 UTCEPSS rescore
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  62. 2026-07-15 16:55 UTCEPSS rescore
  63. 2026-07-15 01:56 UTCEPSS rescore
  64. 2026-07-13 22:26 UTCEPSS rescore
  65. 2026-07-12 05:43 UTCEPSS rescore
  66. 2026-07-11 08:24 UTCEPSS rescore
  67. 2026-07-09 19:06 UTCEPSS rescore
  68. 2026-07-08 15:11 UTCEPSS rescore
  69. 2026-07-07 13:42 UTCEPSS rescore
  70. 2026-07-07 13:42 UTCEPSS rescore
  71. 2026-07-06 16:24 UTCEPSS rescore
  72. 2026-07-06 16:24 UTCEPSS rescore
  73. 2026-07-06 02:20 UTCEPSS rescore
  74. 2026-07-05 02:27 UTCEPSS rescore
  75. 2026-07-04 06:28 UTCEPSS rescore

Related CVEs(same product + same vendor + same CWE)

Same vendor

2 shown

redhat:RHSA-2019:0049

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 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 1.7% probability of exploitation in the next 30 days (76th percentile of EPSS-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?
A fix for CVE-2018-15688 is available: update to the fixed version the vendor names in its advisory. The vendor advisories EchelonGraph has for CVE-2018-15688 are linked in the Vendor Advisories panel on this page.

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