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CVE-2026-92542

Blind VXLAN injection into encrypted overlay networks from cluster peer

6.9 MediumFix available

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

Attack profile

How easy it is to exploit

Attack vector
Local
Complexity
Low
Privileges needed
Low
User interaction
None

What an attacker can affect

Confidentiality
None
Integrity
High
Availability
High

Exploit likelihood

0.07%Unchanged since Oct 8, 2026
90%50%10%1%

What each source reports

CVE List Score used 6.9

Blind VXLAN injection into encrypted overlay networks from cluster peer

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
Record
CVE-2026-92542
CVSS 4.0
6.9 MediumCVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:N/VI:H/VA:H/SC:N/SI:N/SA:N
Weakness
CWE-290
Updated
2026-11-02
EUVDEUVD-2026-94483 6.9

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
Record
EUVD-2026-94483
CVSS 4.0
6.9 MediumCVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:N/VI:H/VA:H/SC:N/SI:N/SA:N
Updated
2026-11-02
NVD 6.9

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
Record
CVE-2026-92542
CVSS 4.0
6.9 MediumCVSS: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
Weakness
CWE-290
Updated
2026-11-02
OSVALPINE-CVE-2026-92542 6.9

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
Record
ALPINE-CVE-2026-92542
CVSS 4.0
6.9 MediumCVSS: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
Updated
2026-11-03
OSV 6.9

Blind VXLAN injection into encrypted overlay networks from cluster peer

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
Record
CVE-2026-92542
CVSS 4.0
6.9 MediumCVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:N/VI:H/VA:H/SC:N/SI:N/SA:N
Updated
2026-11-02
OSVDEBIAN-CVE-2026-92542 6.9

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

Record
DEBIAN-CVE-2026-92542
CVSS 4.0
6.9 MediumCVSS: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
Updated
2026-11-02
OSVUBUNTU-CVE-2026-92542 6.9

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

Record
UBUNTU-CVE-2026-92542
CVSS 4.0
6.9 MediumCVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:N/VI:H/VA:H/SC:N/SI:N/SA:N
Updated
2026-11-02
OSVAZL-107739 No score

CVE-2026-92542 affecting package moby-engine 25.0.18-1

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
Record
AZL-107739
Updated
2026-11-05

Affected products

Affected packages

Affected packages
PackageAffectedFixed
docker
Alpine:v3.24
 before 29.8.2-r0
29.8.2-r0
moby-engine
Azure Linux:3
 through 25.0.18-1 None known
docker
Alpaquita:stream
 24.0.2-r0 up to 29.8.2-r0
29.8.2-r0
docker.io
Debian:12
 All versions, plus listed versions
20.10.24+dfsg1-120.10.24+dfsg1-1+deb12u120.10.25+dfsg1-120.10.25+dfsg1-220.10.25+dfsg1-3
Show 42 moreShow less
20.10.25+dfsg1-426.1.4+dfsg1-126.1.4+dfsg1-226.1.4+dfsg1-326.1.4+dfsg1-426.1.4+dfsg1-526.1.4+dfsg1-626.1.4+dfsg1-726.1.4+dfsg1-826.1.4+dfsg1-926.1.4+dfsg2-126.1.4+dfsg3-126.1.5+dfsg1-126.1.5+dfsg1-1026.1.5+dfsg1-226.1.5+dfsg1-326.1.5+dfsg1-426.1.5+dfsg1-526.1.5+dfsg1-626.1.5+dfsg1-726.1.5+dfsg1-826.1.5+dfsg1-927.5.1+dfsg1-127.5.1+dfsg1-227.5.1+dfsg2-127.5.1+dfsg3-127.5.1+dfsg3-227.5.1+dfsg3-327.5.1+dfsg3-427.5.1+dfsg3-527.5.1+dfsg3-627.5.1+dfsg4-127.5.1+dfsg4-228.5.2+dfsg1-128.5.2+dfsg2-128.5.2+dfsg3-128.5.2+dfsg3-228.5.2+dfsg4-128.5.2+dfsg4-228.5.2+dfsg4-328.5.2+dfsg4-428.5.2+dfsg4-5
 None known
docker.io
Debian:13
 All versions, plus listed versions
26.1.5+dfsg1-1026.1.5+dfsg1-926.1.5+dfsg1-9+deb13u127.5.1+dfsg1-127.5.1+dfsg1-2
Show 18 moreShow less
27.5.1+dfsg2-127.5.1+dfsg3-127.5.1+dfsg3-227.5.1+dfsg3-327.5.1+dfsg3-427.5.1+dfsg3-527.5.1+dfsg3-627.5.1+dfsg4-127.5.1+dfsg4-228.5.2+dfsg1-128.5.2+dfsg2-128.5.2+dfsg3-128.5.2+dfsg3-228.5.2+dfsg4-128.5.2+dfsg4-228.5.2+dfsg4-328.5.2+dfsg4-428.5.2+dfsg4-5
 None known
docker.io
Debian:14
 All versions, plus listed versions
26.1.5+dfsg1-1026.1.5+dfsg1-927.5.1+dfsg1-127.5.1+dfsg1-227.5.1+dfsg2-1
Show 17 moreShow less
27.5.1+dfsg3-127.5.1+dfsg3-227.5.1+dfsg3-327.5.1+dfsg3-427.5.1+dfsg3-527.5.1+dfsg3-627.5.1+dfsg4-127.5.1+dfsg4-228.5.2+dfsg1-128.5.2+dfsg2-128.5.2+dfsg3-128.5.2+dfsg3-228.5.2+dfsg4-128.5.2+dfsg4-228.5.2+dfsg4-328.5.2+dfsg4-428.5.2+dfsg4-5
 None known
docker.io
Ubuntu:Pro:16.04:LTS
 All versions, plus listed versions
1.6.2~dfsg1-1ubuntu41.10.2-0ubuntu31.10.2-0ubuntu41.10.3-0ubuntu11.10.3-0ubuntu4
Show 19 moreShow less
1.10.3-0ubuntu51.10.3-0ubuntu61.11.2-0ubuntu5~16.041.12.1-0ubuntu13~16.04.11.12.3-0ubuntu4~16.04.21.12.6-0ubuntu1~16.04.11.13.1-0ubuntu1~16.04.217.03.2-0ubuntu2~16.04.118.06.1-0ubuntu1~16.04.218.06.1-0ubuntu1.2~16.04.118.09.2-0ubuntu1~16.04.118.09.5-0ubuntu1~16.04.218.09.7-0ubuntu1~16.04.118.09.7-0ubuntu1~16.04.418.09.7-0ubuntu1~16.04.518.09.7-0ubuntu1~16.04.618.09.7-0ubuntu1~16.04.718.09.7-0ubuntu1~16.04.9+esm118.09.7-0ubuntu1~16.04.9+esm2
 None known
docker.io
Ubuntu:Pro:18.04:LTS
 All versions, plus listed versions
1.13.1-0ubuntu617.03.2-0ubuntu117.03.2-0ubuntu317.03.2-0ubuntu517.12.1-0ubuntu1
Show 22 moreShow less
18.06.1-0ubuntu1~18.04.118.06.1-0ubuntu1.2~18.04.118.09.2-0ubuntu1~18.04.118.09.5-0ubuntu1~18.04.218.09.7-0ubuntu1~18.04.118.09.7-0ubuntu1~18.04.318.09.7-0ubuntu1~18.04.419.03.6-0ubuntu1~18.04.119.03.6-0ubuntu1~18.04.219.03.6-0ubuntu1~18.04.320.10.2-0ubuntu1~18.04.220.10.2-0ubuntu1~18.04.320.10.7-0ubuntu1~18.04.120.10.7-0ubuntu1~18.04.220.10.7-0ubuntu5~18.04.220.10.7-0ubuntu5~18.04.320.10.12-0ubuntu2~18.04.120.10.21-0ubuntu1~18.04.220.10.21-0ubuntu1~18.04.320.10.21-0ubuntu1~18.04.3+esm120.10.21-0ubuntu1~18.04.3+esm220.10.21-0ubuntu1~18.04.3+esm3
 None known
docker.io
Ubuntu:Pro:20.04:LTS
 All versions, plus listed versions
19.03.2-0ubuntu119.03.6-0ubuntu119.03.8-0ubuntu119.03.8-0ubuntu1.20.0419.03.8-0ubuntu1.20.04.1
Show 15 moreShow less
19.03.8-0ubuntu1.20.04.220.10.2-0ubuntu1~20.04.220.10.2-0ubuntu1~20.04.320.10.7-0ubuntu1~20.04.120.10.7-0ubuntu1~20.04.220.10.7-0ubuntu5~20.04.120.10.7-0ubuntu5~20.04.220.10.12-0ubuntu2~20.04.120.10.21-0ubuntu1~20.04.120.10.21-0ubuntu1~20.04.220.10.21-0ubuntu1~20.04.420.10.21-0ubuntu1~20.04.520.10.21-0ubuntu1~20.04.620.10.21-0ubuntu1~20.04.6+esm120.10.21-0ubuntu1~20.04.6+esm2
 None known
docker.io-app
Ubuntu:Pro:20.04:LTS
 All versions, plus listed versions
20.10.25-0ubuntu1~20.04.120.10.25-0ubuntu1~20.04.224.0.5-0ubuntu1~20.04.124.0.7-0ubuntu2~20.04.126.1.3-0ubuntu1~20.04.126.1.3-0ubuntu1~20.04.1+esm126.1.3-0ubuntu1~20.04.1+esm2
 None known
Show 8 moreShow less
Affected packages
PackageAffectedFixed
docker.io
Ubuntu:Pro:22.04:LTS
 All versions, plus listed versions
20.10.7-0ubuntu520.10.7-0ubuntu720.10.12-0ubuntu120.10.12-0ubuntu220.10.12-0ubuntu3
Show 11 moreShow less
20.10.12-0ubuntu3+gke1.24.120.10.12-0ubuntu420.10.21-0ubuntu1~22.04.220.10.21-0ubuntu1~22.04.320.10.21-0ubuntu1~22.04.520.10.21-0ubuntu1~22.04.620.10.21-0ubuntu1~22.04.720.10.21-0ubuntu1~22.04.7+esm120.10.21-0ubuntu1~22.04.7+esm220.10.21-0ubuntu1~22.04.820.10.21-0ubuntu1~22.04.8+esm1
 None known
docker.io-app
Ubuntu:Pro:22.04:LTS
 All versions, plus listed versions
20.10.25-0ubuntu1~22.04.120.10.25-0ubuntu1~22.04.224.0.5-0ubuntu1~22.04.124.0.7-0ubuntu2~22.04.126.1.3-0ubuntu1~22.04.1
Show 6 moreShow less
26.1.3-0ubuntu1~22.04.1+esm127.5.1-0ubuntu3~22.04.127.5.1-0ubuntu3~22.04.228.2.2-0ubuntu1~22.04.129.1.3-0ubuntu3~22.04.129.1.3-0ubuntu3~22.04.2
 None known
docker.io
Ubuntu:Pro:24.04:LTS
 All versions, plus listed versions
20.10.24+dfsg1-1ubuntu220.10.25+dfsg1-2ubuntu120.10.25+dfsg1-2ubuntu1+esm120.10.25+dfsg1-2ubuntu1+esm220.10.25+dfsg1-2ubuntu1.24.04.120.10.25+dfsg1-2ubuntu1.24.04.1+esm1
 None known
docker.io-app
Ubuntu:Pro:24.04:LTS
 All versions, plus listed versions
24.0.5-0ubuntu124.0.7-0ubuntu124.0.7-0ubuntu224.0.7-0ubuntu324.0.7-0ubuntu4
Show 8 moreShow less
24.0.7-0ubuntu4.126.1.3-0ubuntu1~24.04.126.1.3-0ubuntu1~24.04.1+esm127.5.1-0ubuntu3~24.04.127.5.1-0ubuntu3~24.04.228.2.2-0ubuntu1~24.04.129.1.3-0ubuntu3~24.04.129.1.3-0ubuntu3~24.04.2
 None known
docker.io
Ubuntu:26.10
 All versions, plus listed versions
27.5.1+dfsg4-2ubuntu128.5.2+dfsg4-5ubuntu1
 None known
docker.io-app
Ubuntu:26.10
 All versions, plus listed versions
29.1.3-0ubuntu429.1.3-0ubuntu529.1.3-0ubuntu629.7.2-0ubuntu1
 None known
docker.io
Ubuntu:26.04:LTS
 All versions, plus listed versions
26.1.5+dfsg1-9ubuntu127.5.1+dfsg4-1ubuntu127.5.1+dfsg4-2ubuntu1
 None known
docker.io-app
Ubuntu:26.04:LTS
 All versions, plus listed versions
28.2.2-0ubuntu129.1.2-0ubuntu129.1.3-0ubuntu129.1.3-0ubuntu229.1.3-0ubuntu329.1.3-0ubuntu429.1.3-0ubuntu4.1
 None known

History

History
RecordedChangedSources
factsOSV
affected, aliases, referencesOSV
first indexedCVE List, EUVD, NVD, OSV

Dates are when Every CVE recorded each change. Upstream dates may differ.

In short

CVE-2026-92542 is a medium vulnerability (CVSS 6.9) in Docker Engine, published October 1, 2026. No source lists public exploit code. EPSS puts the chance of exploitation in the next 30 days at 0.07%, the 0th percentile. Fixed in docker 29.8.2-r0.

References

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