- UDP datagram
- Destination port is the Swarm data-path port
- Datagram starts with a VXLAN header for the VNI of an encrypted overlay network which any running container on the node is connected to
Default status is the baseline for the product, each version can override it (e.g. patched versions marked unaffected).
| Vendor | Product | Default status | Versions | |||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Docker | Docker Engine | unaffected |
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| Docker | Docker Engine overlay network driver | unaffected |
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| Moby | Moby overlay network driver | unaffected |
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Project Subscriptions
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No advisories yet.
Solution
No solution given by the vendor.
Workaround
Block userspace processes from sending UDP packets to the Swarm data-path port. iptables -I OUTPUT -p udp --dport "$(docker info --format '{{.Swarm.Cluster.DataPathPort}}')" -m owner --socket-exists -j DROP
Wed, 07 Oct 2026 16:45:00 +0000
| Type | Values Removed | Values Added |
|---|---|---|
| Description | The firewall rules which mark VXLAN datagrams for encryption indiscriminately match both authentic VXLAN datagrams sent from the kernel and forged datagrams sent by user processes. Any packet sent from the host network namespace of a Linux Swarm node is encrypted with the overlay-network IPsec parameters which meets the following criteria: - UDP datagram - Destination port is the Swarm data-path port - Datagram starts with a VXLAN header for the VNI of an encrypted overlay network which any running container on the node is connected to | |
| Title | Blind VXLAN injection into encrypted overlay networks from cluster peer | |
| References |
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| Metrics |
cvssV4_0
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Projects
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MITRE
Status: PUBLISHED
Assigner: Docker
Published:
Updated: 2026-10-07T16:42:20.998Z
Reserved: 2026-09-16T13:00:30.172Z
Link: CVE-2026-92542
Vulnrichment
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NVD
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Redhat
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OpenCVE Enrichment
No data.
No weakness.