CVE-2026-92542
Medium
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
SeverityMedium
CVSS6.9
Exploit probability—
Product
Docker Engine
PublishedOct 7, 2026
First seenOct 7, 2026
Weakness typeCWE-290CWE-290
How to fix
Update
- Docker Docker Engine25.0.19, 29.8.2 or later
- Docker Docker Engine overlay network driverv25.0.19 or later
- Moby Moby overlay network driverv2.0.0-beta.25 or later
Vendor advisories
Affected products
| Product | Affected versions | Fixed in |
|---|---|---|
| Docker Docker Engine | v < 25.0.19, 26.0.0 ≤ v < 29.8.2 | 25.0.19, 29.8.2 |
| Docker Docker Engine overlay network driver | v < v25.0.19, v26.0.0 | v25.0.19 |
| Moby Moby overlay network driver | v2.0.0-beta.0 ≤ v < v2.0.0-beta.25 | v2.0.0-beta.25 |
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