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CVE-2018-15688

29
FAUCET Score

CVE-2018-15688 is a buffer overflow vulnerability in the dhcp6 client of systemd, affecting versions up to and including 239, and impacting distributions like Canonical, Debian, and Red Hat. A malicious DHCPv6 server can exploit this to overwrite heap memory in systemd-networkd. With a CVSS score of 8.8 (High), this vulnerability is easily exploitable over the adjacent network with no user interaction, potentially leading to high confidentiality, integrity, and availability impacts. There is currently no evidence of active exploitation, public exploit code (Metasploit, Nuclei, ExploitDB), or significant community discussion or media coverage.

Impacted Technologies

VendorProductVersion(s)CPE
<= 239CPE matchmatch criteria
cpe:2.3:a:systemd_project:systemd:*:*:*:*:*:*:*:*
8.0CPE matchmatch criteria
cpe:2.3:o:debian:debian_linux:8.0:*:*:*:*:*:*:*
16.04CPE matchmatch criteria
cpe:2.3:o:canonical:ubuntu_linux:16.04:*:*:*:lts:*:*:*
18.04CPE matchmatch criteria
cpe:2.3:o:canonical:ubuntu_linux:18.04:*:*:*:lts:*:*:*
18.10CPE matchmatch criteria
cpe:2.3:o:canonical:ubuntu_linux:18.10:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 3.0

8.8HIGH

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

Attack Vector
ADJACENT_NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
HIGH
Integrity Impact
HIGH
Availability Impact
HIGH
Exploitability Score
2.8
Impact Score
5.9
CvssVersion
3.0

Exploit Intelligence

EPSS Score
1.68%
Probability of exploitation in next 30 days
EPSS Percentile
74.5%
Percentile rank of EPSS score among Peer Group
As of 2026-07-27
Model: v2026.06.15
This CVE's current EPSS score of 0.0168 is in the 86th percentile among its peer group of 1,875 CVEs.

Social Chatter

The average CVE in this peer group has 0.0 Twitter, 0.1 Reddit, 0.1 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 0.2 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.

Remediation

Patch Available

Vendor Patches (7)

github_advisorypatch availablevia nvd_reference
View patch
microsoftpatch availablevia msrc
Product: CBL Mariner 1.0 x64Fixed in: 239-31
microsoftpatch availablevia msrc
Product: CBL Mariner 1.0 ARMFixed in: 239-31
microsoftpatch availablevia msrc
Product: cm1 systemd 239-31 on CBL Mariner 1.0Fixed in: -
microsoftpatch availablevia msrc
Product: 16951-16820Fixed in: -
redhatpatch availablevia redhat_api
Product: Red Hat Enterprise Linux 7Fixed in: systemd-0:219-62.el7_6.2
View patch
redhatpatch availablevia redhat_api
Product: Red Hat Enterprise Linux 7Fixed in: NetworkManager-1:1.12.0-8.el7_6
View patch

Vendor Advisories (3)

microsoft2020-Aug/CVE-2018-15688

CVE-2018-15688

Aug 11, 2020
redhatCVE-2018-15688Important

systemd: Out-of-bounds heap write in systemd-networkd dhcpv6 option handling

Oct 26, 2018
microsoft2018-Oct/CVE-2018-15688Important

Out-of-Bounds write in systemd-networkd dhcpv6 option handling

Oct 9, 2018

References

access.redhat.com / errata/RHBA-2019:0327
Third Party Advisory
access.redhat.com / errata/RHSA-2018:3665
Third Party Advisory
access.redhat.com / errata/RHSA-2019:0049
Third Party Advisory
github.com / systemd/systemd/pull/10518
PatchThird Party Advisory
lists.debian.org / debian-lts-announce/2018/11/msg00017.html
Mailing ListThird Party Advisory
security.gentoo.org / glsa/201810-10
Third Party Advisory
usn.ubuntu.com / 3806-1
Third Party Advisory
usn.ubuntu.com / 3807-1
Third Party Advisory
securityfocus.com / bid/105745
Third Party AdvisoryVDB Entry