Read the docs
TI-2018-04146 Aliases CVE-2018-5739GHSA-h3j8-24jg-q44j

Failure to release memory may exhaust system resources

Priority LOW 37CWE-772Published · Updated

Key facts

Attack vector
Network
Privileges required
None
User interaction
None
Attack complexity
Low
Impact type
Denial of service
Confidentiality · integrity · availability
None · None · High
Fix status
No fix listed

Attack profile from CVSS 3.0 · NVD. Fix status from CNA. Impact type from CWE-772.

Summary

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.

Why it matters now

EPSS 0.01891 79th percentileScored 2026-11-07
Fix No fix listed No fixed version in the sources yet

SSVC decision points

Not available: CISA has not published SSVC decision points for this record.

Affected products

VendorProductAffected versionsFixed inStatusSource
ISCKea DHCPKea DHCP 1.4.0—No fix listedCNA
  • Kea DHCP VendorISC Affected Kea DHCP 1.4.0 Fixed in — No fix listed CNA

CPE configurations NVD · 1

CPEVersionsRoleVendor
cpe:2.3:a:isc:kea:1.4.0:*:*:*:*:*:*:*1.4.0VulnerableISC
  • cpe:2.3:a:isc:kea:1.4.0:*:*:*:*:*:*:* Versions 1.4.0 Vulnerable ·ISC

Remediation

No fixed version listed by the sources yet.

Timeline

  1. 2026-10-02 Threatist record created from CVE-2018-5739
  2. 2026-10-03 Alias added: GHSA-h3j8-24jg-q44j

References

Advisory 1

  • TI-2015-06893 The kea-dhcp4 and kea-dhcp6 servers 0.9.2 and 1.0.0-beta in ISC Kea, when certain… CVSS 3.0MEDIUM 6.8
  • TI-2019-04538 A packet containing a malformed DUID can cause the kea-dhcp6 server to terminate CVSS 3.1MEDIUM 6.5
  • TI-2019-04536 A packet containing a malformed DUID can cause the kea-dhcp6 server to terminate CVSS 3.1MEDIUM 6.5

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences