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Fencer Vulns
high 8.8

CVE-2018-15688 json

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

published 2018-10-26 8 y ago modified 2026-06-17 4 mo ago also EUVD-2018-7558

cvss
8.8
version 3.0, CNA
cisa kev
Not listed
not in CISA's catalog
epss
1.8%
EPSS 1.8% chance of exploitation in 30 days, percentile 78%
public exploits
0
none known

Summary

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.

Patch / fix

  • systemd Debian 14, Debian 13, Debian 12 239-11
  • network-manager Debian 14, Debian 13, Debian 12 1.14.4-2

debian advisories DEBIAN-CVE-2018-15688

  • systemd Ubuntu 16.04 LTS 229-4ubuntu21.6
  • systemd Ubuntu 18.04 LTS 237-3ubuntu10.4
  • network-manager Ubuntu 16.04 LTS 1.2.6-0ubuntu0.16.04.3
  • network-manager Ubuntu 18.04 LTS 1.10.6-2ubuntu1.1

ubuntu advisories UBUNTU-CVE-2018-15688

Ubuntu security data © Canonical Ltd., from https://github.com/canonical/ubuntu-security-notices via OSV; changed: normalised to fixed package versions per release. CC BY-SA 4.0

  • systemd RHEL 7 219-62.el7_6.2
  • libgudev1 RHEL 7 219-62.el7_6.2
  • systemd-libs RHEL 7 219-62.el7_6.2
  • systemd-sysv RHEL 7 219-62.el7_6.2
  • systemd-python RHEL 7 219-62.el7_6.2
  • systemd-networkd RHEL 7 219-62.el7_6.2
  • systemd-resolved RHEL 7 219-62.el7_6.2
  • systemd-journal-gateway RHEL 7 219-62.el7_6.2

red hat advisories RHSA-2019:0049RHSA-2018:3665

  • systemd SLES 12 SP4, SLES 12 SP3, SLES 12 SP2-BCL +10 more 228-150.53.3
  • systemd SLE Module for Basesystem 15 234-24.15.1

suse advisories SUSE-SU-2018:3767-2SUSE-SU-2018:3767-1SUSE-SU-2018:3644-1

  • NetworkManager openSUSE Tumbleweed 1.32.10-2.1
  • systemd openSUSE Tumbleweed 249.4-2.2

opensuse advisories openSUSE-SU-2024:10602-1openSUSE-SU-2024:11420-1

  • systemd Arch Linux 239.300-1

arch linux advisories AVG-789

Vendor advisories

What the vendors themselves say about their products: affected, fixed or not affected, and what to do.

red hat product security vex CVE-2018-15688 updated cvss 8.8

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

  • Red Hat Enterprise Linux Client (v. 7) systemd 219-62.el7_6.2, libgudev1 219-62.el7_6.2, systemd-libs 219-62.el7_6.2, systemd-sysv 219-62.el7_6.2, NetworkManager 1.12.0-8.el7_6, systemd-python 219-62.el7_6.2, +9 more Red Hat Enterprise Linux Client Optional (v. 7) systemd-networkd 219-62.el7_6.2, systemd-resolved 219-62.el7_6.2, NetworkManager-ovs 1.12.0-8.el7_6, systemd-journal-gateway 219-62.el7_6.2, NetworkManager-config-server 1.12.0-8.el7_6, NetworkManager-dispatcher-routing-rules 1.12.0-8.el7_6 Red Hat Enterprise Linux ComputeNode (v. 7) systemd 219-62.el7_6.2, libgudev1 219-62.el7_6.2, systemd-libs 219-62.el7_6.2, systemd-sysv 219-62.el7_6.2, NetworkManager 1.12.0-8.el7_6, systemd-python 219-62.el7_6.2, +9 more Red Hat Enterprise Linux ComputeNode Optional (v. 7) systemd-networkd 219-62.el7_6.2, systemd-resolved 219-62.el7_6.2, NetworkManager-ovs 1.12.0-8.el7_6, systemd-journal-gateway 219-62.el7_6.2, NetworkManager-config-server 1.12.0-8.el7_6, NetworkManager-dispatcher-routing-rules 1.12.0-8.el7_6 Red Hat Enterprise Linux for ARM and IBM Power LE (POWER9) Server (v. 7) systemd 219-62.el7_6.2, libgudev1 219-62.el7_6.2, systemd-libs 219-62.el7_6.2, systemd-sysv 219-62.el7_6.2, NetworkManager 1.12.0-8.el7_6, systemd-python 219-62.el7_6.2, +10 more Red Hat Enterprise Linux for ARM and IBM Power LE (POWER9) Server Optional (v. 7) systemd-networkd 219-62.el7_6.2, systemd-resolved 219-62.el7_6.2, NetworkManager-ovs 1.12.0-8.el7_6, systemd-journal-gateway 219-62.el7_6.2, NetworkManager-dispatcher-routing-rules 1.12.0-8.el7_6
    +4 more products
    Red Hat Enterprise Linux Server (v. 7) systemd 219-62.el7_6.2, libgudev1 219-62.el7_6.2, systemd-libs 219-62.el7_6.2, systemd-sysv 219-62.el7_6.2, NetworkManager 1.12.0-8.el7_6, systemd-python 219-62.el7_6.2, +10 more Red Hat Enterprise Linux Server Optional (v. 7) systemd-networkd 219-62.el7_6.2, systemd-resolved 219-62.el7_6.2, NetworkManager-ovs 1.12.0-8.el7_6, systemd-journal-gateway 219-62.el7_6.2, NetworkManager-dispatcher-routing-rules 1.12.0-8.el7_6 Red Hat Enterprise Linux Workstation (v. 7) systemd 219-62.el7_6.2, libgudev1 219-62.el7_6.2, systemd-libs 219-62.el7_6.2, systemd-sysv 219-62.el7_6.2, NetworkManager 1.12.0-8.el7_6, systemd-python 219-62.el7_6.2, +9 more Red Hat Enterprise Linux Workstation Optional (v. 7) systemd-networkd 219-62.el7_6.2, systemd-resolved 219-62.el7_6.2, NetworkManager-ovs 1.12.0-8.el7_6, systemd-journal-gateway 219-62.el7_6.2, NetworkManager-config-server 1.12.0-8.el7_6, NetworkManager-dispatcher-routing-rules 1.12.0-8.el7_6
    fixed: vendor fix RHSA-2018:3665
  • Red Hat Enterprise Linux 5 NetworkManager Red Hat Enterprise Linux 6 NetworkManager, NetworkManager-glib, NetworkManager-gnome Red Hat Enterprise Linux 8 systemd, systemd-pam, systemd-libs, systemd-udev, systemd-tests, NetworkManager, +16 more Red Hat Virtualization 4 rhvm-appliance, redhat-virtualization-host-image-update
    not affected: vulnerable code not present

Red Hat CSAF VEX © Red Hat, Inc., from https://security.access.redhat.com/data/csaf/v2/vex/; changed: reduced to product statuses and remediations. CC BY 4.0 · csaf

CISA SSVC

Exploitation
none
Automatable
no
Technical impact
total
Assessed
17 mo ago

Exploit prediction

1.78% chance of exploitation in the next 30 days, higher than 78% of all scored CVEs (FIRST EPSS, 2026-11-08).

CVSS scores

assigned by version score vector
CNA 3.0 8.8 CVSS:3.0/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
NVD 3.1 8.8 CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
NVD 2.0 5.8 AV:A/AC:L/Au:N/C:P/I:P/A:P

Affected products

  • systemd systemd

Classification

Weakness
  • CWE-120 Buffer Copy without Checking Size of Input

References

Sources

Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.