CVE-2026-3608Network attack vector

Remote service crash via crafted API message

Published Mar 25, 2026 · Updated Mar 25, 2026

Reachable assertion in ISC Kea 2.6.0 through 2.6.4 and 3.0.0 through 3.0.2 allows remote attackers to crash DHCP daemons. The vendor maps the flaw to a reachable assertion but has not disclosed the triggering field, assertion site, or call path that produces the stack overflow. Exposure requires network reachability to a configured API socket or HA listener; a successful crash terminates the receiving daemon and interrupts DHCP service.

CVSS severity7.5
High
EPSS probability1.36%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Reachable assertion in ISC Kea 2.6.0 through 2.6.4 and 3.0.0 through 3.0.2 allows remote attackers to crash DHCP daemons. The vendor maps the flaw to a reachable assertion but has not disclosed the triggering field, assertion site, or call path that produces the stack overflow. Exposure requires network reachability to a configured API socket or HA listener; a successful crash terminates the receiving daemon and interrupts DHCP service.

The record

CVE
CVE-2026-3608
Published
Mar 25, 2026
Updated
Mar 25, 2026
Vendor
Internet Systems Consortium
Product
Kea DHCP
Classifications
CWE-617, T1499.004
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Mar 25, 2026CVE publishedPublication date reported by the CVE source.
  2. Mar 25, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=2.6.0 <=2.6.4
  2. Affected versionversion=3.0.0 <=3.0.2

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Internet Systems Consortium · Kea DHCPversion=2.6.0 <=2.6.4; version=3.0.0 <=3.0.2

Published CVSS scores

7.5Red HatCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
7.5Internet Systems ConsortiumCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 9, 2026Sep 15, 2026
Latest reporting daySep 15, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-617Reachable Assertion
T1499.004Application or System Exploitation

Public exploit references

No public exploit references are available in this record.

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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