What’s Vulnerable › Vulnerabilities
CVE-2026-92542: Blind VXLAN injection into encrypted overlay networks from cluster peer
- Severity: medium (CVSS 6.9 v4.0)
- Exploited in the wild: not listed in CISA KEV
- EPSS: 0.1% probability of exploitation in the next 30 days
- Public exploit or detection template: none known
- Published: 2026-10-07 · updated 2026-10-08
- Weakness: CWE-290
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
Affected products
- Docker Engine: before 25.0.19; from 26.0.0 before 29.8.2 — fixed in 25.0.19, 29.8.2
- Docker Engine overlay network driver: before v25.0.19; from v26.0.0 — fixed in v25.0.19
- Moby overlay network driver: from v2.0.0-beta.0 before v2.0.0-beta.25 — fixed in v2.0.0-beta.25
How to fix
Upgrade to a fixed version: Docker Engine 25.0.19, 29.8.2; Docker Engine overlay network driver v25.0.19; Moby overlay network driver v2.0.0-beta.25. Check the vendor advisory for mitigations.
References
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