CVE-2026-13622
Full vulnerability record from the local CVENow database.
Description
A symlink following vulnerability was found in KubeVirt's virt-handler migration proxy. During live migration, virt-handler dials Unix sockets inside the target virt-launcher pod via /proc/<pid>/root/ paths using net.Dial() without symlink protection. These socket paths reside in qemu-owned directories writable by the virt-launcher user. An attacker with namespace edit and pods/exec permissions can replace a migration proxy socket with a symlink to the host CRI-O socket. Because virt-handler runs as root in the host mount namespace, absolute symlink targets resolve against the host filesystem, and the bidirectional io.Copy proxy relays attacker-controlled bytes to the container runtime, enabling full node compromise.
Severity
HIGH
CVSS score
8.8
(v3.1)
Vulnerability status
Awaiting Analysis
Source identifier
Published
2026-08-12 21:17:35.630000
Last modified
2026-10-23 19:10:00.167000
View original CVE JSON
{
"id": "CVE-2026-13622",
"sourceIdentifier": "[email protected]",
"published": "2026-08-12T21:17:35.630",
"lastModified": "2026-10-23T19:10:00.167",
"vulnStatus": "Awaiting Analysis",
"cveTags": [],
"descriptions": [
{
"lang": "en",
"value": "A symlink following vulnerability was found in KubeVirt's virt-handler migration proxy. During live migration, virt-handler dials Unix sockets inside the target virt-launcher pod via /proc/<pid>/root/ paths using net.Dial() without symlink protection. These socket paths reside in qemu-owned directories writable by the virt-launcher user. An attacker with namespace edit and pods/exec permissions can replace a migration proxy socket with a symlink to the host CRI-O socket. Because virt-handler runs as root in the host mount namespace, absolute symlink targets resolve against the host filesystem, and the bidirectional io.Copy proxy relays attacker-controlled bytes to the container runtime, enabling full node compromise."
},
{
"lang": "es",
"value": "Se encontró una vulnerabilidad de seguimiento de enlaces simbólicos en el proxy de migración virt-handler de KubeVirt. Durante la migración en vivo, virt-handler se conecta a sockets Unix dentro del pod virt-launcher de destino a través de rutas /proc/[pid]/root/ usando net.Dial() sin protección contra enlaces simbólicos. Estas rutas de socket residen en directorios propiedad de qemu escribibles por el usuario virt-launcher. Un atacante con permisos de edición de namespace y pods/exec puede reemplazar un socket del proxy de migración con un enlace simbólico al socket CRI-O del host. Debido a que virt-handler se ejecuta como root en el namespace de montaje del host, los destinos de enlaces simbólicos absolutos se resuelven contra el sistema de archivos del host, y el proxy bidireccional io.Copy retransmite bytes controlados por el atacante al tiempo de ejecución del contenedor, lo que permite el compromiso total del nodo."
}
],
"affected": [
{
"source": "[email protected]",
"affectedData": [
{
"vendor": "Red Hat",
"product": "Red Hat Container Native Virtualization 4.12",
"defaultStatus": "affected",
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"packageName": "container-native-virtualization/virt-handler",
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],
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}
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{
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{
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{
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"product": "Red Hat Container Native Virtualization 4.18",
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"packageName": "container-native-virtualization/virt-handler-rhel9",
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{
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{
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{
"version": "1785831334",
"lessThan": "*",
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}
]
},
{
"vendor": "Red Hat",
"product": "Red Hat Container Native Virtualization 4.21",
"defaultStatus": "affected",
"collectionURL": "https://catalog.redhat.com/software/containers/",
"packageName": "container-native-virtualization/virt-handler-rhel9",
"cpes": [
"cpe:/a:redhat:container_native_virtualization:4.21::el9"
],
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{
"version": "1785829701",
"lessThan": "*",
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]
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{
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"product": "Red Hat Container Native Virtualization 4.22",
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}
]
}
],
"metrics": {
"cvssMetricV31": [
{
"source": "[email protected]",
"type": "Secondary",
"cvssData": {
"version": "3.1",
"vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H",
"baseScore": 8.8,
"baseSeverity": "HIGH",
"attackVector": "LOCAL",
"attackComplexity": "LOW",
"privilegesRequired": "LOW",
"userInteraction": "NONE",
"scope": "CHANGED",
"confidentialityImpact": "HIGH",
"integrityImpact": "HIGH",
"availabilityImpact": "HIGH"
},
"exploitabilityScore": 2.0,
"impactScore": 6.0
}
],
"ssvcV203": [
{
"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
"ssvcData": {
"timestamp": "2026-08-13T19:21:32.127174Z",
"id": "CVE-2026-13622",
"options": [
{
"exploitation": "none"
},
{
"automatable": "no"
},
{
"technicalImpact": "total"
}
],
"role": "CISA Coordinator",
"version": "2.0.3"
}
}
]
},
"weaknesses": [
{
"source": "[email protected]",
"type": "Secondary",
"description": [
{
"lang": "en",
"value": "CWE-22"
}
]
}
],
"references": [
{
"url": "https://access.redhat.com/errata/RHEA-2026:53670",
"source": "[email protected]"
},
{
"url": "https://access.redhat.com/errata/RHSA-2026:51031",
"source": "[email protected]"
},
{
"url": "https://access.redhat.com/errata/RHSA-2026:53655",
"source": "[email protected]"
},
{
"url": "https://access.redhat.com/errata/RHSA-2026:53671",
"source": "[email protected]"
},
{
"url": "https://access.redhat.com/errata/RHSA-2026:53684",
"source": "[email protected]"
},
{
"url": "https://access.redhat.com/errata/RHSA-2026:53721",
"source": "[email protected]"
},
{
"url": "https://access.redhat.com/errata/RHSA-2026:53728",
"source": "[email protected]"
},
{
"url": "https://access.redhat.com/errata/RHSA-2026:53763",
"source": "[email protected]"
},
{
"url": "https://access.redhat.com/errata/RHSA-2026:53797",
"source": "[email protected]"
},
{
"url": "https://access.redhat.com/errata/RHSA-2026:53826",
"source": "[email protected]"
},
{
"url": "https://access.redhat.com/errata/RHSA-2026:53838",
"source": "[email protected]"
},
{
"url": "https://access.redhat.com/security/cve/CVE-2026-13622",
"source": "[email protected]"
},
{
"url": "https://bugzilla.redhat.com/show_bug.cgi?id=2494142",
"source": "[email protected]"
}
]
}