Bug 2547588 (CVE-2026-92542) - CVE-2026-92542 github.com/moby/moby: Moby: Unauthorized traffic injection via forged VXLAN datagrams
Summary: CVE-2026-92542 github.com/moby/moby: Moby: Unauthorized traffic injection via...
Keywords:
Status: NEW
Alias: CVE-2026-92542
Product: Security Response
Classification: Other
Component: vulnerability
Version: unspecified
Hardware: All
OS: Linux
high
high
Target Milestone: ---
Assignee: Product Security DevOps Team
QA Contact:
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Depends On:
Blocks:
TreeView+ depends on / blocked
 
Reported: 2026-10-07 16:51 UTC by OSIDB Bzimport
Modified: 2026-10-09 05:46 UTC (History)
33 users (show)

Fixed In Version:
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Description OSIDB Bzimport 2026-10-07 16:51:48 UTC 
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
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