Skip to content
Fencer Vulns
medium 6.9

CVE-2026-92542 json

Blind VXLAN injection into encrypted overlay networks from cluster peer

published 2026-10-01 38 d ago modified 2026-10-08 31 d ago also EUVD-2026-94483 , GHSA-6m9p-4h64-m6vh

cvss
6.9
version 4.0, CNA
cisa kev
Not listed
not in CISA's catalog
epss
0.1%
EPSS 0.1% chance of exploitation in 30 days, percentile 0%
public exploits
0
none known

Summary

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

Patch / fix

  • go github.com/moby/moby/v2/daemon/libnetwork/drivers/overlay v2.0.0-beta.25
  • go github.com/docker/docker/libnetwork/drivers/overlay v25.0.19
  • Docker Docker Engine 25.0.19, 29.8.2
  • Docker Docker Engine overlay network driver v25.0.19
  • Moby Moby overlay network driver v2.0.0-beta.25
  • docker Alpine 3.24 29.8.2-r0

alpine advisories ALPINE-CVE-2026-92542

Alpine secdb © Alpine Linux, from https://secdb.alpinelinux.org via OSV; changed: normalised to fixed package versions per release. CC BY-SA 4.0

Vendor advisories

What the vendors themselves say about their products: affected, fixed or not affected, and what to do.

red hat product security vex CVE-2026-92542 updated cvss 7.1

github.com/moby/moby: Moby: Unauthorized traffic injection via forged VXLAN datagrams

  • Red Hat Multicluster Engine for Kubernetes multicluster-engine/assisted-service-9-rhel9 Red Hat Ceph Storage 5 rhceph/rhceph-5-dashboard-rhel8 Red Hat Ceph Storage 7 rhceph/grafana-rhel9 Red Hat Ceph Storage 9 rhceph/grafana-rhel10 Red Hat OpenShift Container Platform 4 openshift4/ose-agent-installer-api-server-rhel9
    affected: no fix available
  • Red Hat Multicluster Global Hub 1.7.4 multicluster-globalhub/multicluster-globalhub-grafana-rhel9 1793002792
    fixed: vendor fix RHSA-2026:95517
  • Red Hat Multicluster Global Hub 1.7.4 multicluster-globalhub/multicluster-globalhub-agent-rhel9 1792971214, multicluster-globalhub/multicluster-globalhub-manager-rhel9 1792971204, multicluster-globalhub/multicluster-globalhub-rhel9-operator 1793057598, multicluster-globalhub/multicluster-globalhub-operator-bundle 1793081711, multicluster-globalhub/multicluster-globalhub-postgres-exporter-rhel9 1793057536 Red Hat Advanced Cluster Management for Kubernetes 2 rhacm2/acm-grafana-rhel9
    not affected: vulnerable code not present
  • Red Hat Enterprise Linux 9 grafana, grafana-selinux, grafana 12.4.3-2.el10 Red Hat Enterprise Linux 10 grafana 12.4.3-2.el10
    not affected: component not present
  • Red Hat OpenShift Container Platform 4 openshift4/ose-console, openshift4/ose-agent-installer-api-server-rhel8 Red Hat OpenShift Container Platform 5 openshift5/ose-agent-installer-api-server-rhel9
    not affected: vulnerable code not present

Red Hat CSAF VEX © Red Hat, Inc., from https://security.access.redhat.com/data/csaf/v2/vex/; changed: reduced to product statuses and remediations. CC BY 4.0 · csaf

CISA SSVC

Exploitation
none
Automatable
no
Technical impact
partial
Assessed
32 d ago

Exploit prediction

0.07% chance of exploitation in the next 30 days, higher than 0% of all scored CVEs (FIRST EPSS, 2026-11-08).

CVSS scores

assigned by version score vector
CNA 4.0 6.9 CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:N/VI:H/VA:H/SC:N/SI:N/SA:N
CNA 4.0 6.9 CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:N/VI:H/VA:H/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X

Affected packages

ecosystem package affected fixed in
go github.com/moby/moby/v2/daemon/libnetwork/drivers/overlay
<=v2.0.0-beta.24
v2.0.0-beta.25
go github.com/docker/docker/libnetwork/drivers/overlay
<=v25.0.18, >v26.0.0
v25.0.19

Affected products

  • Docker Docker Engine
  • Docker Docker Engine overlay network driver
  • Moby Moby overlay network driver

Classification

Weakness
  • CWE-290 Authentication Bypass by Spoofing
Technology feeds

References

Sources

Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.

The maintainers of moby/moby published their own advisory on GitHub. Reviewed sources take precedence over it.