CVE-2026-92542
Blind VXLAN injection into encrypted overlay networks from cluster peer
Reported by docker · Published October 7, 2026
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
Fixed versions
Upgrade to a fixed version or later. Language registries are listed first, then Linux distributions, then vendor products.
| Package | Ecosystem | Fixed in |
|---|---|---|
| docker | Alpine | 29.8.2-r0 |
| docker | Amazon Linux | 25.0.18-1.amzn2023.0.1 |
| Docker Engine | Docker | 29.8.2, 25.0.19 |
| github.com/moby/moby/v2/daemon/libnetwork/drivers/overlay | Moby | 2.0.0-beta.25 |
| github.com/docker/docker/libnetwork/drivers/overlay | Docker | 25.0.19 |
Risk scores
Affected products
| Vendor | Product | Versions |
|---|---|---|
| Docker | Docker Engine | 0, 26.0.0 |
| Docker | Docker Engine overlay network driver | 0, v26.0.0 |
| Moby | Moby overlay network driver | v2.0.0-beta.0 |
| Docker | Docker Engine | 26.0.0, 0 |
| alpine | docker | 0 |
| amazon:2023 | docker | 0 |
| Moby | Moby overlay network driver | 2.0.0-beta.0 |
| Docker | Docker Engine overlay network driver | 26.0.0, 0 |
Timeline
- Oct 7, 2026 CVE Published
- Oct 7, 2026 CVE Updated
- Oct 8, 2026 EPSS Score
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