CVE catalog

CVE-2018-5739

isc-kea: CVE-2018-5739

Severity: Low
Source: [NVD] · [CVE record]
EPSS: 1.89% · Oct 25, 2026

An extension to hooks capabilities which debuted in Kea 1.4.0 introduced a memory leak for operators who are using certain hooks library facilities. In order to support multiple requests simultaneously, Kea 1.4 added a callout handle store but unfortunately the initial implementation of this store does not properly free memory in every case. Hooks which make use of query4 or query6 parameters in their callouts can leak memory, resulting in the eventual exhaustion of available memory and subsequent failure of the server process. Affects Kea DHCP 1.4.0.

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-kea	sid	`3.0.4-2`	not affected
Debian	isc-kea	forky	`3.0.4-2`	not affected
Debian	isc-kea	trixie	`2.6.3-1+deb13u1`	not affected
Debian	isc-kea	bookworm	`2.2.0-6`	not affected

Fixed-version evidence

Distribution	Package	Type	Release	Fixed version	Urgency	Origin	Bugs
Debian	isc-kea	source	sid	`Not affected`	unimportant	Not reported	Not reported
Debian	isc-kea	source	forky	`Not affected`	unimportant	Not reported	Not reported
Debian	isc-kea	source	trixie	`Not affected`	unimportant	Not reported	Not reported
Debian	isc-kea	source	bookworm	`Not affected`	unimportant	Not reported	Not reported

OpenFactory catalog packages

[Debian 12 (Bookworm)]

[kea]Not affected
Source package: [isc-kea]
Details (2)
- 2.2.0-6 · all · bookworm
  Not affected
  dsa · isc-kea · debian · bookworm
- 2.2.0-6 · all · bookworm
  Not affected
  dsa · isc-kea · debian · bookworm
[kea-admin]Not affected
Source package: [isc-kea]
Details (2)
- 2.2.0-6 · amd64 · bookworm
  Not affected
  dsa · isc-kea · debian · bookworm
- 2.2.0-6 · arm64 · bookworm
  Not affected
  dsa · isc-kea · debian · bookworm
[kea-common]Not affected
Source package: [isc-kea]
Details (2)
- 2.2.0-6 · amd64 · bookworm
  Not affected
  dsa · isc-kea · debian · bookworm
- 2.2.0-6 · arm64 · bookworm
  Not affected
  dsa · isc-kea · debian · bookworm
[kea-ctrl-agent]Not affected
Source package: [isc-kea]
Details (2)
- 2.2.0-6 · amd64 · bookworm
  Not affected
  dsa · isc-kea · debian · bookworm
- 2.2.0-6 · arm64 · bookworm
  Not affected
  dsa · isc-kea · debian · bookworm
[kea-dev]Not affected
Source package: [isc-kea]
Details (2)
- 2.2.0-6 · amd64 · bookworm
  Not affected
  dsa · isc-kea · debian · bookworm
- 2.2.0-6 · arm64 · bookworm
  Not affected
  dsa · isc-kea · debian · bookworm
[kea-dhcp4-server]Not affected
Source package: [isc-kea]
Details (2)
- 2.2.0-6 · amd64 · bookworm
  Not affected
  dsa · isc-kea · debian · bookworm
- 2.2.0-6 · arm64 · bookworm
  Not affected
  dsa · isc-kea · debian · bookworm
[kea-dhcp6-server]Not affected
Source package: [isc-kea]
Details (2)
- 2.2.0-6 · amd64 · bookworm
  Not affected
  dsa · isc-kea · debian · bookworm
- 2.2.0-6 · arm64 · bookworm
  Not affected
  dsa · isc-kea · debian · bookworm
[kea-dhcp-ddns-server]Not affected
Source package: [isc-kea]
Details (2)
- 2.2.0-6 · amd64 · bookworm
  Not affected
  dsa · isc-kea · debian · bookworm
- 2.2.0-6 · arm64 · bookworm
  Not affected
  dsa · isc-kea · debian · bookworm
[kea-doc]Not affected
Source package: [isc-kea]
Details (2)
- 2.2.0-6 · all · bookworm
  Not affected
  dsa · isc-kea · debian · bookworm
- 2.2.0-6 · all · bookworm
  Not affected
  dsa · isc-kea · debian · bookworm
[python3-kea-connector]Not affected
Source package: [isc-kea]
Details (2)
- 2.2.0-6 · all · bookworm
  Not affected
  dsa · isc-kea · debian · bookworm
- 2.2.0-6 · all · bookworm
  Not affected
  dsa · isc-kea · debian · bookworm

Observed: Oct 23, 2026, 5:37:22 PM UTC

References

[https://security-tracker.debian.org/tracker/CVE-2018-5739]

[Debian Security Tracker] · [FIRST EPSS]