CVE catalog

CVE-2018-5732

isc-dhcp: CVE-2018-5732

Severity: High · CVSS 7.5CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Published: Feb 28, 2018, 12:00:00 AM UTC
Source: [NVD] · [CVE record]
EPSS: 5.24% · Oct 25, 2026

Failure to properly bounds-check a buffer used for processing DHCP options allows a malicious server (or an entity masquerading as a server) to cause a buffer overflow (and resulting crash) in dhclient by sending a response containing a specially constructed options section. Affects ISC DHCP versions 4.1.0 -> 4.1-ESV-R15, 4.2.0 -> 4.2.8, 4.3.0 -> 4.3.6, 4.4.0

Vulnerable and fixed packages

Distribution-reported package versions and fixes. These do not depend on matching against the OpenFactory package catalog.

Distribution	Package	Release	Version	Status
Debian	isc-dhcp	trixie	`4.4.3-P1-8`	fixed
Debian	isc-dhcp	bookworm	`4.4.3-P1-2`	fixed
Alpine	dhcp	3.10	`4.4.1-r0`	fixed
Alpine	dhcp	3.11	`4.4.1-r0`	fixed
Alpine	dhcp	3.12	`4.4.1-r0`	fixed
Alpine	dhcp	3.13	`4.4.1-r0`	fixed
Alpine	dhcp	3.14	`4.4.1-r0`	fixed
Alpine	dhcp	3.15	`4.4.1-r0`	fixed
Alpine	dhcp	3.16	`4.4.1-r0`	fixed
Alpine	dhcp	3.17	`4.4.1-r0`	fixed
Alpine	dhcp	3.18	`4.4.1-r0`	fixed
Alpine	dhcp	3.19	`4.4.1-r0`	fixed
Alpine	dhcp	3.20	`4.4.1-r0`	fixed
Ubuntu	isc-dhcp	14.04	`4.2.4-7ubuntu8`	vulnerable
Ubuntu	isc-dhcp	14.04	`4.2.4-7ubuntu9`	vulnerable
Ubuntu	isc-dhcp	14.04	`4.2.4-7ubuntu10`	vulnerable
Ubuntu	isc-dhcp	14.04	`4.2.4-7ubuntu11`	vulnerable
Ubuntu	isc-dhcp	14.04	`4.2.4-7ubuntu12`	vulnerable
Ubuntu	isc-dhcp	14.04	`4.2.4-7ubuntu12.1`	vulnerable
Ubuntu	isc-dhcp	14.04	`4.2.4-7ubuntu12.2`	vulnerable
Ubuntu	isc-dhcp	14.04	`4.2.4-7ubuntu12.3`	vulnerable
Ubuntu	isc-dhcp	14.04	`4.2.4-7ubuntu12.4`	vulnerable
Ubuntu	isc-dhcp	14.04	`4.2.4-7ubuntu12.5`	vulnerable
Ubuntu	isc-dhcp	14.04	`4.2.4-7ubuntu12.6`	vulnerable
Ubuntu	isc-dhcp	14.04	`4.2.4-7ubuntu12.7`	vulnerable
Ubuntu	isc-dhcp	14.04	`4.2.4-7ubuntu12.8`	vulnerable
Ubuntu	isc-dhcp	14.04	`4.2.4-7ubuntu12.9`	vulnerable
Ubuntu	isc-dhcp	14.04	`4.2.4-7ubuntu12.10`	vulnerable
Ubuntu	isc-dhcp	14.04	`4.2.4-7ubuntu12.12`	fixed
Ubuntu	isc-dhcp	16.04	`4.3.1-5ubuntu3`	vulnerable
Ubuntu	isc-dhcp	16.04	`4.3.1-5ubuntu4`	vulnerable
Ubuntu	isc-dhcp	16.04	`4.3.1-5ubuntu5`	vulnerable
Ubuntu	isc-dhcp	16.04	`4.3.3-5ubuntu1`	vulnerable
Ubuntu	isc-dhcp	16.04	`4.3.3-5ubuntu2`	vulnerable
Ubuntu	isc-dhcp	16.04	`4.3.3-5ubuntu4`	vulnerable
Ubuntu	isc-dhcp	16.04	`4.3.3-5ubuntu5`	vulnerable
Ubuntu	isc-dhcp	16.04	`4.3.3-5ubuntu7`	vulnerable
Ubuntu	isc-dhcp	16.04	`4.3.3-5ubuntu8`	vulnerable
Ubuntu	isc-dhcp	16.04	`4.3.3-5ubuntu9`	vulnerable
Ubuntu	isc-dhcp	16.04	`4.3.3-5ubuntu10`	vulnerable
Ubuntu	isc-dhcp	16.04	`4.3.3-5ubuntu11`	vulnerable
Ubuntu	isc-dhcp	16.04	`4.3.3-5ubuntu12`	vulnerable
Ubuntu	isc-dhcp	16.04	`4.3.3-5ubuntu12.1`	vulnerable
Ubuntu	isc-dhcp	16.04	`4.3.3-5ubuntu12.3`	vulnerable
Ubuntu	isc-dhcp	16.04	`4.3.3-5ubuntu12.4`	vulnerable
Ubuntu	isc-dhcp	16.04	`4.3.3-5ubuntu12.6`	vulnerable
Ubuntu	isc-dhcp	16.04	`4.3.3-5ubuntu12.7`	vulnerable
Ubuntu	isc-dhcp	16.04	`4.3.3-5ubuntu12.9`	fixed
Ubuntu	isc-dhcp	18.04	`4.3.5-3ubuntu2`	vulnerable
Ubuntu	isc-dhcp	18.04	`4.3.5-3ubuntu3`	vulnerable
Ubuntu	isc-dhcp	18.04	`4.3.5-3ubuntu4`	vulnerable
Ubuntu	isc-dhcp	18.04	`4.3.5-3ubuntu5`	fixed
Suse	dhcp	linux enterprise software development kit 11 sp4	`4.2.4.P2-0.28.8.1`	fixed
Suse	dhcp	linux enterprise server 11 sp4	`4.2.4.P2-0.28.8.1`	fixed
Suse	dhcp	linux enterprise server for sap applications 11 sp4	`4.2.4.P2-0.28.8.1`	fixed
Suse	dhcp	linux enterprise desktop 12 sp2	`4.3.3-10.14.1`	fixed
Suse	dhcp	linux enterprise desktop 12 sp3	`4.3.3-10.14.1`	fixed
Suse	dhcp	linux enterprise server for raspberry pi 12 sp2	`4.3.3-10.14.1`	fixed
Suse	dhcp	linux enterprise software development kit 12 sp2	`4.3.3-10.14.1`	fixed
Suse	dhcp	linux enterprise software development kit 12 sp3	`4.3.3-10.14.1`	fixed
Suse	dhcp	linux enterprise server 12 sp2	`4.3.3-10.14.1`	fixed
Suse	dhcp	linux enterprise server for sap applications 12 sp2	`4.3.3-10.14.1`	fixed
Suse	dhcp	linux enterprise server 12 sp3	`4.3.3-10.14.1`	fixed
Suse	dhcp	linux enterprise server for sap applications 12 sp3	`4.3.3-10.14.1`	fixed
Suse	dhcp	linux enterprise point of sale 11 sp3	`4.2.4.P2-0.28.8.1`	fixed
Suse	dhcp	linux enterprise server 11 sp3-ltss	`4.2.4.P2-0.28.8.1`	fixed
Suse	dhcp	linux enterprise server 11 sp3-teradata	`4.2.4.P2-0.28.8.1`	fixed

Fixed-version evidence

Distribution	Package	Type	Release	Fixed version	Urgency	Origin	Bugs
Debian	isc-dhcp	source	trixie	`4.3.5-3.1`	not yet assigned	Not reported	[891786]
Debian	isc-dhcp	source	bookworm	`4.3.5-3.1`	not yet assigned	Not reported	[891786]
Alpine	dhcp	apk	3.10	`4.4.1-r0`	Not reported	ALPINE-CVE-2018-5732	Not reported
Alpine	dhcp	apk	3.11	`4.4.1-r0`	Not reported	ALPINE-CVE-2018-5732	Not reported
Alpine	dhcp	apk	3.12	`4.4.1-r0`	Not reported	ALPINE-CVE-2018-5732	Not reported
Alpine	dhcp	apk	3.13	`4.4.1-r0`	Not reported	ALPINE-CVE-2018-5732	Not reported
Alpine	dhcp	apk	3.14	`4.4.1-r0`	Not reported	ALPINE-CVE-2018-5732	Not reported
Alpine	dhcp	apk	3.15	`4.4.1-r0`	Not reported	ALPINE-CVE-2018-5732	Not reported
Alpine	dhcp	apk	3.16	`4.4.1-r0`	Not reported	ALPINE-CVE-2018-5732	Not reported
Alpine	dhcp	apk	3.17	`4.4.1-r0`	Not reported	ALPINE-CVE-2018-5732	Not reported
Alpine	dhcp	apk	3.18	`4.4.1-r0`	Not reported	ALPINE-CVE-2018-5732	Not reported
Alpine	dhcp	apk	3.19	`4.4.1-r0`	Not reported	ALPINE-CVE-2018-5732	Not reported
Alpine	dhcp	apk	3.20	`4.4.1-r0`	Not reported	ALPINE-CVE-2018-5732	Not reported
Ubuntu	isc-dhcp	deb	14.04	`4.2.4-7ubuntu12.12`	Not reported	UBUNTU-CVE-2018-5732	Not reported
Ubuntu	isc-dhcp	deb	16.04	`4.3.3-5ubuntu12.9`	Not reported	UBUNTU-CVE-2018-5732	Not reported
Ubuntu	isc-dhcp	deb	18.04	`4.3.5-3ubuntu5`	Not reported	UBUNTU-CVE-2018-5732	Not reported
Suse	dhcp	rpm	linux enterprise software development kit 11 sp4	`4.2.4.P2-0.28.8.1`	Not reported	SUSE-SU-2018:0810-1	Not reported
Suse	dhcp	rpm	linux enterprise server 11 sp4	`4.2.4.P2-0.28.8.1`	Not reported	SUSE-SU-2018:0810-1	Not reported
Suse	dhcp	rpm	linux enterprise server for sap applications 11 sp4	`4.2.4.P2-0.28.8.1`	Not reported	SUSE-SU-2018:0810-1	Not reported
Suse	dhcp	rpm	linux enterprise desktop 12 sp2	`4.3.3-10.14.1`	Not reported	SUSE-SU-2018:0812-1	Not reported
Suse	dhcp	rpm	linux enterprise desktop 12 sp3	`4.3.3-10.14.1`	Not reported	SUSE-SU-2018:0812-1	Not reported
Suse	dhcp	rpm	linux enterprise server for raspberry pi 12 sp2	`4.3.3-10.14.1`	Not reported	SUSE-SU-2018:0812-1	Not reported
Suse	dhcp	rpm	linux enterprise software development kit 12 sp2	`4.3.3-10.14.1`	Not reported	SUSE-SU-2018:0812-1	Not reported
Suse	dhcp	rpm	linux enterprise software development kit 12 sp3	`4.3.3-10.14.1`	Not reported	SUSE-SU-2018:0812-1	Not reported
Suse	dhcp	rpm	linux enterprise server 12 sp2	`4.3.3-10.14.1`	Not reported	SUSE-SU-2018:0812-1	Not reported
Suse	dhcp	rpm	linux enterprise server for sap applications 12 sp2	`4.3.3-10.14.1`	Not reported	SUSE-SU-2018:0812-1	Not reported
Suse	dhcp	rpm	linux enterprise server 12 sp3	`4.3.3-10.14.1`	Not reported	SUSE-SU-2018:0812-1	Not reported
Suse	dhcp	rpm	linux enterprise server for sap applications 12 sp3	`4.3.3-10.14.1`	Not reported	SUSE-SU-2018:0812-1	Not reported
Suse	dhcp	rpm	linux enterprise point of sale 11 sp3	`4.2.4.P2-0.28.8.1`	Not reported	SUSE-SU-2018:0810-2	Not reported
Suse	dhcp	rpm	linux enterprise server 11 sp3-ltss	`4.2.4.P2-0.28.8.1`	Not reported	SUSE-SU-2018:0810-2	Not reported
Suse	dhcp	rpm	linux enterprise server 11 sp3-teradata	`4.2.4.P2-0.28.8.1`	Not reported	SUSE-SU-2018:0810-2	Not reported

[Debian bug #891786]

OpenFactory catalog packages

[Debian 12 (Bookworm)]

[isc-dhcp-client]Fixed
Source package: [isc-dhcp]
Details (2)
- 4.4.3-P1-2 · amd64 · bookworm
  Fixed · Fixed: 4.3.5-3.1
  dsa · isc-dhcp · debian · bookworm; dsa · isc-dhcp · debian · 12
- 4.4.3-P1-2 · arm64 · bookworm
  Fixed · Fixed: 4.3.5-3.1
  dsa · isc-dhcp · debian · bookworm; dsa · isc-dhcp · debian · 12
[isc-dhcp-client-ddns]Fixed
Source package: [isc-dhcp]
Details (2)
- 4.4.3-P1-2 · amd64 · bookworm
  Fixed · Fixed: 4.3.5-3.1
  dsa · isc-dhcp · debian · bookworm; dsa · isc-dhcp · debian · 12
- 4.4.3-P1-2 · arm64 · bookworm
  Fixed · Fixed: 4.3.5-3.1
  dsa · isc-dhcp · debian · bookworm; dsa · isc-dhcp · debian · 12
[isc-dhcp-common]Fixed
Source package: [isc-dhcp]
Details (2)
- 4.4.3-P1-2 · amd64 · bookworm
  Fixed · Fixed: 4.3.5-3.1
  dsa · isc-dhcp · debian · bookworm; dsa · isc-dhcp · debian · 12
- 4.4.3-P1-2 · arm64 · bookworm
  Fixed · Fixed: 4.3.5-3.1
  dsa · isc-dhcp · debian · bookworm; dsa · isc-dhcp · debian · 12
[isc-dhcp-dev]Fixed
Source package: [isc-dhcp]
Details (2)
- 4.4.3-P1-2 · amd64 · bookworm
  Fixed · Fixed: 4.3.5-3.1
  dsa · isc-dhcp · debian · bookworm; dsa · isc-dhcp · debian · 12
- 4.4.3-P1-2 · arm64 · bookworm
  Fixed · Fixed: 4.3.5-3.1
  dsa · isc-dhcp · debian · bookworm; dsa · isc-dhcp · debian · 12
[isc-dhcp-relay]Fixed
Source package: [isc-dhcp]
Details (2)
- 4.4.3-P1-2 · amd64 · bookworm
  Fixed · Fixed: 4.3.5-3.1
  dsa · isc-dhcp · debian · bookworm; dsa · isc-dhcp · debian · 12
- 4.4.3-P1-2 · arm64 · bookworm
  Fixed · Fixed: 4.3.5-3.1
  dsa · isc-dhcp · debian · bookworm; dsa · isc-dhcp · debian · 12
[isc-dhcp-server]Fixed
Source package: [isc-dhcp]
Details (2)
- 4.4.3-P1-2 · amd64 · bookworm
  Fixed · Fixed: 4.3.5-3.1
  dsa · isc-dhcp · debian · bookworm; dsa · isc-dhcp · debian · 12
- 4.4.3-P1-2 · arm64 · bookworm
  Fixed · Fixed: 4.3.5-3.1
  dsa · isc-dhcp · debian · bookworm; dsa · isc-dhcp · debian · 12
[isc-dhcp-server-ldap]Fixed
Source package: [isc-dhcp]
Details (2)
- 4.4.3-P1-2 · amd64 · bookworm
  Fixed · Fixed: 4.3.5-3.1
  dsa · isc-dhcp · debian · bookworm; dsa · isc-dhcp · debian · 12
- 4.4.3-P1-2 · arm64 · bookworm
  Fixed · Fixed: 4.3.5-3.1
  dsa · isc-dhcp · debian · bookworm; dsa · isc-dhcp · debian · 12

[Debian 13 (Trixie)]

[isc-dhcp-client]Fixed
Source package: [isc-dhcp]
Details (2)
- 4.4.3-P1-8 · amd64 · trixie
  Fixed · Fixed: 4.3.5-3.1
  dsa · isc-dhcp · debian · 13
- 4.4.3-P1-8 · arm64 · trixie
  Fixed · Fixed: 4.3.5-3.1
  dsa · isc-dhcp · debian · 13
[isc-dhcp-client-ddns]Fixed
Source package: [isc-dhcp]
Details (2)
- 4.4.3-P1-8 · amd64 · trixie
  Fixed · Fixed: 4.3.5-3.1
  dsa · isc-dhcp · debian · 13
- 4.4.3-P1-8 · arm64 · trixie
  Fixed · Fixed: 4.3.5-3.1
  dsa · isc-dhcp · debian · 13
[isc-dhcp-common]Fixed
Source package: [isc-dhcp]
Details (2)
- 4.4.3-P1-8 · amd64 · trixie
  Fixed · Fixed: 4.3.5-3.1
  dsa · isc-dhcp · debian · 13
- 4.4.3-P1-8 · arm64 · trixie
  Fixed · Fixed: 4.3.5-3.1
  dsa · isc-dhcp · debian · 13
[isc-dhcp-dev]Fixed
Source package: [isc-dhcp]
Details (2)
- 4.4.3-P1-8 · amd64 · trixie
  Fixed · Fixed: 4.3.5-3.1
  dsa · isc-dhcp · debian · 13
- 4.4.3-P1-8 · arm64 · trixie
  Fixed · Fixed: 4.3.5-3.1
  dsa · isc-dhcp · debian · 13
[isc-dhcp-keama]Fixed
Source package: [isc-dhcp]
Details (2)
- 4.4.3-P1-8 · amd64 · trixie
  Fixed · Fixed: 4.3.5-3.1
  dsa · isc-dhcp · debian · 13
- 4.4.3-P1-8 · arm64 · trixie
  Fixed · Fixed: 4.3.5-3.1
  dsa · isc-dhcp · debian · 13
[isc-dhcp-relay]Fixed
Source package: [isc-dhcp]
Details (2)
- 4.4.3-P1-8 · amd64 · trixie
  Fixed · Fixed: 4.3.5-3.1
  dsa · isc-dhcp · debian · 13
- 4.4.3-P1-8 · arm64 · trixie
  Fixed · Fixed: 4.3.5-3.1
  dsa · isc-dhcp · debian · 13
[isc-dhcp-server]Fixed
Source package: [isc-dhcp]
Details (2)
- 4.4.3-P1-8 · amd64 · trixie
  Fixed · Fixed: 4.3.5-3.1
  dsa · isc-dhcp · debian · 13
- 4.4.3-P1-8 · arm64 · trixie
  Fixed · Fixed: 4.3.5-3.1
  dsa · isc-dhcp · debian · 13
[isc-dhcp-server-ldap]Fixed
Source package: [isc-dhcp]
Details (2)
- 4.4.3-P1-8 · amd64 · trixie
  Fixed · Fixed: 4.3.5-3.1
  dsa · isc-dhcp · debian · 13
- 4.4.3-P1-8 · arm64 · trixie
  Fixed · Fixed: 4.3.5-3.1
  dsa · isc-dhcp · debian · 13

Observed: Oct 23, 2026, 5:37:21 PM UTC

References

[CERT-Bund public advisories] · [Debian Security Tracker] · [FIRST EPSS] · [OSV Package Vulnerability Database] · [Red Hat security advisories and VEX] · [SUSE security advisories and VEX]