CVE-2026-3608 (GCVE-0-2026-3608)
Vulnerability from cvelistv5 – Published: 2026-03-25 08:46 – Updated: 2026-07-15 01:02
VLAI
EPSS
VEX
Title
Stack overflow in Kea daemons
Summary
Sending a maliciously crafted message to the kea-ctrl-agent, kea-dhcp-ddns, kea-dhcp4, or kea-dhcp6 daemons over any configured API socket or HA listener can cause the receiving daemon to exit with a stack overflow error.
This issue affects Kea versions 2.6.0 through 2.6.4 and 3.0.0 through 3.0.2.
Severity
7.5 (High)
SSVC
Exploitation: none
Automatable: yes
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-03-25 13:26 UTC
CWE
- CWE-617 - Reachable Assertion
Assigner
References
9 references
| URL | Tags |
|---|---|
| https://kb.isc.org/docs/cve-2026-3608 | vendor-advisory |
| https://downloads.isc.org/isc/kea/2.6.5 | patch |
| https://downloads.isc.org/isc/kea/3.0.3 | patch |
| http://www.openwall.com/lists/oss-security/2026/03/25/6 | |
| https://access.redhat.com/security/cve/CVE-2026-3608 | vdb-entryx_refsource_REDHAT |
| https://bugzilla.redhat.com/show_bug.cgi?id=2451139 | issue-trackingx_refsource_REDHAT |
| https://security.access.redhat.com/data/csaf/v2/v… | x_sadp-csaf-vex |
| https://access.redhat.com/errata/RHSA-2026:11344 | vendor-advisoryx_refsource_REDHAT |
| https://access.redhat.com/errata/RHSA-2026:7342 | vendor-advisoryx_refsource_REDHAT |
Impacted products
3 products
| Vendor | Product | Version | CPE status | |
|---|---|---|---|---|
| ISC | Kea |
Affected:
2.6.0 , ≤ 2.6.4
(custom)
Affected: 3.0.0 , ≤ 3.0.2 (custom) cpe:2.3:a:isc:kea:*:*:*:*:*:*:*:* cpe:2.3:a:isc:kea:*:*:*:*:*:*:*:* |
||
| Red Hat | Red Hat Enterprise Linux 10 |
Unaffected:
0:3.0.1-3.el10_1 , < *
(rpm)
cpe:/o:redhat:enterprise_linux:10.1 |
||
| Red Hat | Red Hat Enterprise Linux 10.0 Extended Update Support |
Unaffected:
0:2.6.3-2.el10_0.3 , < *
(rpm)
cpe:/o:redhat:enterprise_linux_eus:10.0 |
Date Public
2026-03-25 00:00
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"problemTypes": [
{
"descriptions": [
{
"cweId": "CWE-617",
"description": "Reachable Assertion",
"lang": "en",
"type": "CWE"
}
]
}
],
"providerMetadata": {
"dateUpdated": "2026-07-15T01:02:33.862Z",
"orgId": "0b0ca135-0b70-47e7-9f44-1890c2a1c46c",
"shortName": "redhat-SADP"
},
"references": [
{
"tags": [
"vdb-entry",
"x_refsource_REDHAT"
],
"url": "https://access.redhat.com/security/cve/CVE-2026-3608"
},
{
"name": "RHBZ#2451139",
"tags": [
"issue-tracking",
"x_refsource_REDHAT"
],
"url": "https://bugzilla.redhat.com/show_bug.cgi?id=2451139"
},
{
"tags": [
"x_sadp-csaf-vex"
],
"url": "https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-3608.json"
},
{
"tags": [
"vendor-advisory",
"x_refsource_REDHAT"
],
"url": "https://access.redhat.com/errata/RHSA-2026:11344"
},
{
"tags": [
"vendor-advisory",
"x_refsource_REDHAT"
],
"url": "https://access.redhat.com/errata/RHSA-2026:7342"
}
],
"solutions": [
{
"lang": "en",
"value": "RHSA-2026:11344: Red Hat Enterprise Linux AppStream EUS (v. 10.0), Red Hat Enterprise Linux BaseOS EUS (v. 10.0), Red Hat Enterprise Linux CodeReady Linux Builder EUS (v. 10.0)"
},
{
"lang": "en",
"value": "RHSA-2026:7342: Red Hat Enterprise Linux AppStream (v. 10), Red Hat Enterprise Linux BaseOS (v. 10), Red Hat Enterprise Linux CodeReady Linux Builder (v. 10)"
}
],
"timeline": [
{
"lang": "en",
"time": "2026-03-25T09:01:15.192Z",
"value": "Reported to Red Hat."
},
{
"lang": "en",
"time": "2026-03-25T08:46:48.992Z",
"value": "Made public."
}
],
"title": "Kea: Kea: Denial of Service via maliciously crafted message",
"x_adpType": "supplier",
"x_generator": {
"engine": "sadp-cli 1.0.0"
}
},
{
"metrics": [
{
"other": {
"content": {
"id": "CVE-2026-3608",
"options": [
{
"Exploitation": "none"
},
{
"Automatable": "yes"
},
{
"Technical Impact": "partial"
}
],
"role": "CISA Coordinator",
"timestamp": "2026-03-25T13:26:04.073699Z",
"version": "2.0.3"
},
"type": "ssvc"
}
}
],
"providerMetadata": {
"dateUpdated": "2026-03-25T13:26:07.634Z",
"orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
"shortName": "CISA-ADP"
},
"title": "CISA ADP Vulnrichment"
}
],
"cna": {
"affected": [
{
"defaultStatus": "unaffected",
"product": "Kea",
"vendor": "ISC",
"versions": [
{
"lessThanOrEqual": "2.6.4",
"status": "affected",
"version": "2.6.0",
"versionType": "custom"
},
{
"lessThanOrEqual": "3.0.2",
"status": "affected",
"version": "3.0.0",
"versionType": "custom"
}
]
}
],
"cpeApplicability": [
{
"nodes": [
{
"cpeMatch": [
{
"criteria": "cpe:2.3:a:isc:kea:*:*:*:*:*:*:*:*",
"versionEndIncluding": "2.6.4",
"versionStartIncluding": "2.6.0",
"vulnerable": true
},
{
"criteria": "cpe:2.3:a:isc:kea:*:*:*:*:*:*:*:*",
"versionEndIncluding": "3.0.2",
"versionStartIncluding": "3.0.0",
"vulnerable": true
}
],
"operator": "OR"
}
]
}
],
"credits": [
{
"lang": "en",
"value": "ISC would like to thank Ali Norouzi of Keysight for bringing this vulnerability to our attention."
}
],
"datePublic": "2026-03-25T00:00:00.000Z",
"descriptions": [
{
"lang": "en",
"value": "Sending a maliciously crafted message to the kea-ctrl-agent, kea-dhcp-ddns, kea-dhcp4, or kea-dhcp6 daemons over any configured API socket or HA listener can cause the receiving daemon to exit with a stack overflow error.\nThis issue affects Kea versions 2.6.0 through 2.6.4 and 3.0.0 through 3.0.2."
}
],
"exploits": [
{
"lang": "en",
"value": "We are not aware of any active exploits."
}
],
"impacts": [
{
"descriptions": [
{
"lang": "en",
"value": "Loss of DHCP services"
}
]
}
],
"metrics": [
{
"cvssV3_1": {
"attackComplexity": "LOW",
"attackVector": "NETWORK",
"availabilityImpact": "HIGH",
"baseScore": 7.5,
"baseSeverity": "HIGH",
"confidentialityImpact": "NONE",
"integrityImpact": "NONE",
"privilegesRequired": "NONE",
"scope": "UNCHANGED",
"userInteraction": "NONE",
"vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H",
"version": "3.1"
}
}
],
"problemTypes": [
{
"descriptions": [
{
"cweId": "CWE-617",
"description": "CWE-617 Reachable Assertion",
"lang": "en",
"type": "CWE"
}
]
}
],
"providerMetadata": {
"dateUpdated": "2026-03-25T08:46:48.992Z",
"orgId": "404fd4d2-a609-4245-b543-2c944a302a22",
"shortName": "isc"
},
"references": [
{
"name": "CVE-2026-3608",
"tags": [
"vendor-advisory"
],
"url": "https://kb.isc.org/docs/cve-2026-3608"
},
{
"tags": [
"patch"
],
"url": "https://downloads.isc.org/isc/kea/2.6.5"
},
{
"tags": [
"patch"
],
"url": "https://downloads.isc.org/isc/kea/3.0.3"
}
],
"solutions": [
{
"lang": "en",
"value": "Upgrade to the patched release most closely related to your current version of Kea: 2.6.5 or 3.0.3."
}
],
"source": {
"discovery": "EXTERNAL"
},
"title": "Stack overflow in Kea daemons",
"workarounds": [
{
"lang": "en",
"value": "Securing the API sockets with TLS, and requiring the client to authenticate with a certificate (mutual authentication), prevents the attacker from establishing an API connection to Kea. Set cert-required to true (the default) to require a client certificate. See: https://kea.readthedocs.io/en/stable/arm/security.html#tls-https-configuration"
}
]
}
},
"cveMetadata": {
"assignerOrgId": "404fd4d2-a609-4245-b543-2c944a302a22",
"assignerShortName": "isc",
"cveId": "CVE-2026-3608",
"datePublished": "2026-03-25T08:46:48.992Z",
"dateReserved": "2026-03-05T17:47:36.088Z",
"dateUpdated": "2026-07-15T01:02:33.862Z",
"state": "PUBLISHED"
},
"dataType": "CVE_RECORD",
"dataVersion": "5.2"
}
}
}
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Experimental. This forecast is provided for visualization only and may change without notice. Do not use it for operational decisions.
Forecast uses a logistic model when the trend is rising, or an exponential decay model when the trend is falling. Fitted via linearized least squares.
Sightings
| Author | Source | Type | Date | Other |
|---|
Nomenclature
- Seen: The vulnerability was mentioned, discussed, or observed by the user.
- Confirmed: The vulnerability has been validated from an analyst's perspective.
- Published Proof of Concept: A public proof of concept is available for this vulnerability.
- Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
- Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
- Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
- Not confirmed: The user expressed doubt about the validity of the vulnerability.
- Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.
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The MITRE ATT&CK techniques below are AI-generated suggestions, inferred from the description of the
vulnerability by the CIRCL/vulnerability-attack-technique-classification-roberta-base
model, served locally by ML-Gateway.
They have not been verified by an analyst and are provided for guidance only.
The approach is described in our paper Mapping CVEs to MITRE ATT&CK Techniques: A Curated Gold-Set Classifier and the Limits of LLM-Assisted Label Expansion.
Browse all ATT&CK techniques and the vulnerabilities related to each.
The approach is described in our paper Mapping CVEs to MITRE ATT&CK Techniques: A Curated Gold-Set Classifier and the Limits of LLM-Assisted Label Expansion.
Browse all ATT&CK techniques and the vulnerabilities related to each.
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Related by attack behaviour
Vulnerabilities whose description is nearest to this one in the vector space of the CIRCL/vulnerability-attack-technique-biencoder model. This is a similarity search over the bi-encoder space (plain cosine), not a classification, and it has no measured accuracy.
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