CVE-2019-6474medium

CVE-2019-6474: medium-severity vulnerability in ISC Kea

A packet containing a malformed DUID can cause the kea-dhcp6 server to terminate

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13Vexday Risk Score

No sign of exploitation. No public exploitation artifact known so far.

ssvc Trackcvss 5.7epss 0.7%
A missing check on incoming client requests can be exploited to cause a situation where the Kea server's lease storage contains leases which are rejected as invalid when the server tries to load leases from storage on restart. If the number of such leases exceeds a hard-coded limit in the Kea code, a server trying to restart will conclude that there is a problem with its lease store and give up. Versions affected: 1.4.0 to 1.5.0, 1.6.0-beta1, and 1.6.0-beta2
CVSS:3.1/AV:A/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H
Affected products
ISC · Kea
Related CVEs — ISC Kea

In the same product, most dangerous first.

CVE-2026-3608HIGHStack overflow in Kea daemonsEPSS 1.4%CVE-2019-6473MEDIUMA packet containing a malformed DUID can cause the kea-dhcp6 server to terminateEPSS 1.2%CVE-2019-6472MEDIUMA packet containing a malformed DUID can cause the kea-dhcp6 server to terminateEPSS 0.8%CVE-2025-40779HIGHKea crash upon interaction between specific client options and subnet selectionEPSS 0.5%CVE-2025-11232HIGHInvalid characters cause assertEPSS 0.4%CVE-2025-32801HIGHLoading a malicious hook library can lead to local privilege escalationEPSS 0.3%