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CVE-2024-32473

Moby IPv6 enabled on IPv4-only network interfaces

4.7 MediumFix available

Moby is an open source container framework that is a key component of Docker Engine, Docker Desktop, and other distributions of container tooling or runtimes. In 26.0.0, IPv6 is not disabled on network interfaces, including those belonging to networks where --ipv6=false. An container with an ipvlan or macvlan interface will normally be configured to share an external network link with the host machine. Because of this direct access, (1) Containers may be able to communicate with other hosts on the local network over link-local IPv6 addresses, (2) if router advertisements are being broadcast over the local network, containers may get SLAAC-assigned addresses, and (3) the interface will be a member of IPv6 multicast groups. This means interfaces in IPv4-only networks present an unexpectedly and unnecessarily increased attack surface. The issue is patched in 26.0.2. To completely disable IPv6 in a container, use --sysctl=net.ipv6.conf.all.disable_ipv6=1 in the docker create or docker run command. Or, in the service configuration of a compose file.

Attack profile

How easy it is to exploit

Attack vector
Local
Complexity
High
Privileges needed
None
User interaction
Required

What an attacker can affect

Confidentiality
High
Integrity
None
Availability
None

Exploit likelihood

0.35%Up 0.3 points since Apr 19, 2024
90%50%10%1%

What each source reports

CVE List Score used 4.7

Moby IPv6 enabled on IPv4-only network interfaces

Moby is an open source container framework that is a key component of Docker Engine, Docker Desktop, and other distributions of container tooling or runtimes. In 26.0.0, IPv6 is not disabled on network interfaces, including those belonging to networks where --ipv6=false. An container with an ipvlan or macvlan interface will normally be configured to share an external network link with the host machine. Because of this direct access, (1) Containers may be able to communicate with other hosts on the local network over link-local IPv6 addresses, (2) if router advertisements are being broadcast over the local network, containers may get SLAAC-assigned addresses, and (3) the interface will be a member of IPv6 multicast groups. This means interfaces in IPv4-only networks present an unexpectedly and unnecessarily increased attack surface. The issue is patched in 26.0.2. To completely disable IPv6 in a container, use --sysctl=net.ipv6.conf.all.disable_ipv6=1 in the docker create or docker run command. Or, in the service configuration of a compose file.

Record
CVE-2024-32473
CVSS 3.1
4.7 MediumCVSS:3.1/AV:L/AC:H/PR:N/UI:R/S:U/C:H/I:N/A:N
Weakness
CWE-668
Updated
2026-11-02
EUVDEUVD-2024-1333 4.7

Moby is an open source container framework that is a key component of Docker Engine, Docker Desktop, and other distributions of container tooling or runtimes. In 26.0.0, IPv6 is not disabled on network interfaces, including those belonging to networks where --ipv6=false. An container with an ipvlan or macvlan interface will normally be configured to share an external network link with the host machine. Because of this direct access, (1) Containers may be able to communicate with other hosts on the local network over link-local IPv6 addresses, (2) if router advertisements are being broadcast over the local network, containers may get SLAAC-assigned addresses, and (3) the interface will be a member of IPv6 multicast groups. This means interfaces in IPv4-only networks present an unexpectedly and unnecessarily increased attack surface. The issue is patched in 26.0.2. To completely disable IPv6 in a container, use --sysctl=net.ipv6.conf.all.disable_ipv6=1 in the docker create or docker run command. Or, in the service configuration of a compose file.

Record
EUVD-2024-1333
CVSS 3.1
4.7 MediumCVSS:3.1/AV:L/AC:H/PR:N/UI:R/S:U/C:H/I:N/A:N
Updated
2026-11-03
GitHub AdvisoriesGHSA-x84c-p2g9-rqv9 4.7

IPv6 enabled on IPv4-only network interfaces

In 26.0.0 and 26.0.1, IPv6 is not disabled on network interfaces, including those belonging to networks where --ipv6=false.

Impact

A container with an ipvlan or macvlan interface will normally be configured to share an external network link with the host machine. Because of this direct access, with IPv6 enabled:

  • Containers may be able to communicate with other hosts on the local network over link-local IPv6 addresses.
  • If router advertisements are being broadcast over the local network, containers may get SLAAC-assigned addresses.
  • The interface will be a member of IPv6 multicast groups.

This means interfaces in IPv4-only networks present an unexpectedly and unnecessarily increased attack surface.

A container with an unexpected IPv6 address can do anything a container configured with an IPv6 address can do. That is, listen for connections on its IPv6 address, open connections to other nodes on the network over IPv6, or attempt a DoS attack by flooding packets from its IPv6 address. This has CVSS score AV:L/AC:H/PR:N/UI:R/S:C/C:N/I:N/A:L (2.7).

Because the container may not be constrained by an IPv6 firewall, there is increased potential for data exfiltration from the container. This has CVSS score AV:L/AC:H/PR:N/UI:R/S:U/C:H/I:N/A:N (4.7).

A remote attacker could send malicious Router Advertisements to divert traffic to itself, a black-hole, or another device. The same attack is possible today for IPv4 macvlan/ipvlan endpoints with ARP spoofing, TLS is commonly used by Internet APIs to mitigate this risk. The presence of an IPv6 route could impact the container's availability by indirectly abusing the behaviour of software which behaves poorly in a dual-stack environment. For example, it could resolve a name to a DNS AAAA record and keep trying to connect over IPv6 without ever falling back to IPv4, potentially denying service to the container. This has CVSS score AV:A/AC:L/PR:H/UI:N/S:U/C:N/I:N/A:H (4.5).

Patches

The issue is patched in 26.0.2.

Workarounds

To completely disable IPv6 in a container, use --sysctl=net.ipv6.conf.all.disable_ipv6=1 in the docker create or docker run command. Or, in the service configuration of a compose file, the equivalent:

        sysctls:
            - net.ipv6.conf.all.disable_ipv6=1

References

Record
GHSA-x84c-p2g9-rqv9
CVSS 3.1
4.7 MediumCVSS:3.1/AV:L/AC:H/PR:N/UI:R/S:U/C:H/I:N/A:N
Weakness
CWE-668
Updated
2026-11-02
NVD 4.7

Moby is an open source container framework that is a key component of Docker Engine, Docker Desktop, and other distributions of container tooling or runtimes. In 26.0.0, IPv6 is not disabled on network interfaces, including those belonging to networks where --ipv6=false. An container with an ipvlan or macvlan interface will normally be configured to share an external network link with the host machine. Because of this direct access, (1) Containers may be able to communicate with other hosts on the local network over link-local IPv6 addresses, (2) if router advertisements are being broadcast over the local network, containers may get SLAAC-assigned addresses, and (3) the interface will be a member of IPv6 multicast groups. This means interfaces in IPv4-only networks present an unexpectedly and unnecessarily increased attack surface. The issue is patched in 26.0.2. To completely disable IPv6 in a container, use --sysctl=net.ipv6.conf.all.disable_ipv6=1 in the docker create or docker run command. Or, in the service configuration of a compose file.

Record
CVE-2024-32473
CVSS 3.1
4.7 MediumCVSS:3.1/AV:L/AC:H/PR:N/UI:R/S:U/C:H/I:N/A:N
CVSS 3.1
6.5 MediumCVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Weakness
CWE-668
Updated
2026-11-02
OSVALPINE-CVE-2024-32473 6.5

Moby is an open source container framework that is a key component of Docker Engine, Docker Desktop, and other distributions of container tooling or runtimes. In 26.0.0, IPv6 is not disabled on network interfaces, including those belonging to networks where --ipv6=false. An container with an ipvlan or macvlan interface will normally be configured to share an external network link with the host machine. Because of this direct access, (1) Containers may be able to communicate with other hosts on the local network over link-local IPv6 addresses, (2) if router advertisements are being broadcast over the local network, containers may get SLAAC-assigned addresses, and (3) the interface will be a member of IPv6 multicast groups. This means interfaces in IPv4-only networks present an unexpectedly and unnecessarily increased attack surface. The issue is patched in 26.0.2. To completely disable IPv6 in a container, use --sysctl=net.ipv6.conf.all.disable_ipv6=1 in the docker create or docker run command. Or, in the service configuration of a compose file.

Record
ALPINE-CVE-2024-32473
CVSS 3.1
6.5 MediumCVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Updated
2026-11-03
OSVBELL-CVE-2024-32473 6.5
Record
BELL-CVE-2024-32473
CVSS 3.1
6.5 MediumCVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Updated
2026-11-02
Show 7 moreShow less
OSV 4.7

Moby IPv6 enabled on IPv4-only network interfaces

Moby is an open source container framework that is a key component of Docker Engine, Docker Desktop, and other distributions of container tooling or runtimes. In 26.0.0, IPv6 is not disabled on network interfaces, including those belonging to networks where --ipv6=false. An container with an ipvlan or macvlan interface will normally be configured to share an external network link with the host machine. Because of this direct access, (1) Containers may be able to communicate with other hosts on the local network over link-local IPv6 addresses, (2) if router advertisements are being broadcast over the local network, containers may get SLAAC-assigned addresses, and (3) the interface will be a member of IPv6 multicast groups. This means interfaces in IPv4-only networks present an unexpectedly and unnecessarily increased attack surface. The issue is patched in 26.0.2. To completely disable IPv6 in a container, use --sysctl=net.ipv6.conf.all.disable_ipv6=1 in the docker create or docker run command. Or, in the service configuration of a compose file.

Record
CVE-2024-32473
CVSS 3.1
4.7 MediumCVSS:3.1/AV:L/AC:H/PR:N/UI:R/S:U/C:H/I:N/A:N
Weakness
CWE-668
Updated
2026-11-02
OSVDEBIAN-CVE-2024-32473 6.5

Moby is an open source container framework that is a key component of Docker Engine, Docker Desktop, and other distributions of container tooling or runtimes. In 26.0.0, IPv6 is not disabled on network interfaces, including those belonging to networks where --ipv6=false. An container with an ipvlan or macvlan interface will normally be configured to share an external network link with the host machine. Because of this direct access, (1) Containers may be able to communicate with other hosts on the local network over link-local IPv6 addresses, (2) if router advertisements are being broadcast over the local network, containers may get SLAAC-assigned addresses, and (3) the interface will be a member of IPv6 multicast groups. This means interfaces in IPv4-only networks present an unexpectedly and unnecessarily increased attack surface. The issue is patched in 26.0.2. To completely disable IPv6 in a container, use --sysctl=net.ipv6.conf.all.disable_ipv6=1 in the docker create or docker run command. Or, in the service configuration of a compose file.

Record
DEBIAN-CVE-2024-32473
CVSS 3.1
6.5 MediumCVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Updated
2026-11-02
OSVGHSA-x84c-p2g9-rqv9 4.7

IPv6 enabled on IPv4-only network interfaces

In 26.0.0 and 26.0.1, IPv6 is not disabled on network interfaces, including those belonging to networks where --ipv6=false.

Impact

A container with an ipvlan or macvlan interface will normally be configured to share an external network link with the host machine. Because of this direct access, with IPv6 enabled:

  • Containers may be able to communicate with other hosts on the local network over link-local IPv6 addresses.
  • If router advertisements are being broadcast over the local network, containers may get SLAAC-assigned addresses.
  • The interface will be a member of IPv6 multicast groups.

This means interfaces in IPv4-only networks present an unexpectedly and unnecessarily increased attack surface.

A container with an unexpected IPv6 address can do anything a container configured with an IPv6 address can do. That is, listen for connections on its IPv6 address, open connections to other nodes on the network over IPv6, or attempt a DoS attack by flooding packets from its IPv6 address. This has CVSS score AV:L/AC:H/PR:N/UI:R/S:C/C:N/I:N/A:L (2.7).

Because the container may not be constrained by an IPv6 firewall, there is increased potential for data exfiltration from the container. This has CVSS score AV:L/AC:H/PR:N/UI:R/S:U/C:H/I:N/A:N (4.7).

A remote attacker could send malicious Router Advertisements to divert traffic to itself, a black-hole, or another device. The same attack is possible today for IPv4 macvlan/ipvlan endpoints with ARP spoofing, TLS is commonly used by Internet APIs to mitigate this risk. The presence of an IPv6 route could impact the container's availability by indirectly abusing the behaviour of software which behaves poorly in a dual-stack environment. For example, it could resolve a name to a DNS AAAA record and keep trying to connect over IPv6 without ever falling back to IPv4, potentially denying service to the container. This has CVSS score AV:A/AC:L/PR:H/UI:N/S:U/C:N/I:N/A:H (4.5).

Patches

The issue is patched in 26.0.2.

Workarounds

To completely disable IPv6 in a container, use --sysctl=net.ipv6.conf.all.disable_ipv6=1 in the docker create or docker run command. Or, in the service configuration of a compose file, the equivalent:

        sysctls:
            - net.ipv6.conf.all.disable_ipv6=1

References

Record
GHSA-x84c-p2g9-rqv9
CVSS 3.1
4.7 MediumCVSS:3.1/AV:L/AC:H/PR:N/UI:R/S:U/C:H/I:N/A:N
Weakness
CWE-668
Updated
2026-11-02
OSVOESA-2024-1591 4.7

docker security update

Docker is an open source project to build, ship and run any application as a lightweight container.

Security Fix(es):

Moby is an open source container framework that is a key component of Docker Engine, Docker Desktop, and other distributions of container tooling or runtimes. In 26.0.0, IPv6 is not disabled on network interfaces, including those belonging to networks where --ipv6=false. An container with an ipvlan or macvlan interface will normally be configured to share an external network link with the host machine. Because of this direct access, (1) Containers may be able to communicate with other hosts on the local network over link-local IPv6 addresses, (2) if router advertisements are being broadcast over the local network, containers may get SLAAC-assigned addresses, and (3) the interface will be a member of IPv6 multicast groups. This means interfaces in IPv4-only networks present an unexpectedly and unnecessarily increased attack surface. The issue is patched in 26.0.2. To completely disable IPv6 in a container, use --sysctl=net.ipv6.conf.all.disable_ipv6=1 in the docker create or docker run command. Or, in the service configuration of a compose file.(CVE-2024-32473)

Record
OESA-2024-1591
CVSS 3.1
4.7 MediumCVSS:3.1/AV:L/AC:H/PR:N/UI:R/S:U/C:H/I:N/A:N
Updated
2026-11-02
OSVOESA-2024-1625 4.7

docker security update

Docker is an open source project to build, ship and run any application as a lightweight container.

Security Fix(es):

Moby is an open source container framework that is a key component of Docker Engine, Docker Desktop, and other distributions of container tooling or runtimes. In 26.0.0, IPv6 is not disabled on network interfaces, including those belonging to networks where --ipv6=false. An container with an ipvlan or macvlan interface will normally be configured to share an external network link with the host machine. Because of this direct access, (1) Containers may be able to communicate with other hosts on the local network over link-local IPv6 addresses, (2) if router advertisements are being broadcast over the local network, containers may get SLAAC-assigned addresses, and (3) the interface will be a member of IPv6 multicast groups. This means interfaces in IPv4-only networks present an unexpectedly and unnecessarily increased attack surface. The issue is patched in 26.0.2. To completely disable IPv6 in a container, use --sysctl=net.ipv6.conf.all.disable_ipv6=1 in the docker create or docker run command. Or, in the service configuration of a compose file.(CVE-2024-32473)

Record
OESA-2024-1625
CVSS 3.1
4.7 MediumCVSS:3.1/AV:L/AC:H/PR:N/UI:R/S:U/C:H/I:N/A:N
Updated
2026-11-02
OSVUBUNTU-CVE-2024-32473 4.7

Moby is an open source container framework that is a key component of Docker Engine, Docker Desktop, and other distributions of container tooling or runtimes. In 26.0.0, IPv6 is not disabled on network interfaces, including those belonging to networks where --ipv6=false. An container with an ipvlan or macvlan interface will normally be configured to share an external network link with the host machine. Because of this direct access, (1) Containers may be able to communicate with other hosts on the local network over link-local IPv6 addresses, (2) if router advertisements are being broadcast over the local network, containers may get SLAAC-assigned addresses, and (3) the interface will be a member of IPv6 multicast groups. This means interfaces in IPv4-only networks present an unexpectedly and unnecessarily increased attack surface. The issue is patched in 26.0.2. To completely disable IPv6 in a container, use --sysctl=net.ipv6.conf.all.disable_ipv6=1 in the docker create or docker run command. Or, in the service configuration of a compose file.

Record
UBUNTU-CVE-2024-32473
CVSS 3.1
4.7 MediumCVSS:3.1/AV:L/AC:H/PR:N/UI:R/S:U/C:H/I:N/A:N
CVSS 3.1
6.5 MediumCVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Updated
2026-11-02
OSVGO-2024-2737 No score

IPv6 enabled on IPv4-only network interfaces in github.com/docker/docker

IPv6 enabled on IPv4-only network interfaces in github.com/docker/docker

Record
GO-2024-2737
Updated
2026-11-02

Affected products

Affected packages

Affected packages
PackageAffectedFixed
github.com/docker/docker
Go
 26.0.0 up to 26.0.2
26.0.2
docker
Alpine:v3.20
 before 26.0.2-r0
26.0.2-r0
docker
Alpine:v3.21
 before 26.0.2-r0
26.0.2-r0
docker
Alpine:v3.22
 before 26.0.2-r0
26.0.2-r0
docker
Alpine:v3.23
 before 26.0.2-r0
26.0.2-r0
docker
Alpine:v3.24
 before 26.0.2-r0
26.0.2-r0
docker
Alpaquita:stream
 26.0.0-r0 up to 26.1.0-r0
26.1.0-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
 before 26.1.4+dfsg1-9
26.1.4+dfsg1-9
docker.io
Debian:14
 before 26.1.4+dfsg1-9
26.1.4+dfsg1-9
Show 9 moreShow less
Affected packages
PackageAffectedFixed
github.com/docker/docker
Go
 26.0.0+incompatible up to 26.0.2+incompatible
26.0.2+incompatible
docker
openEuler:20.03-LTS-SP1
 before engine-18.09.0-265.oe1
engine-18.09.0-265.oe1
docker
openEuler:20.03-LTS-SP4
 before engine-18.09.0-265.oe2003sp4
engine-18.09.0-265.oe2003sp4
docker
openEuler:22.03-LTS
 before engine-18.09.0-335.oe2203sp2
engine-18.09.0-335.oe2203sp2
docker
openEuler:22.03-LTS-SP1
 before engine-18.09.0-335.oe2203sp1
engine-18.09.0-335.oe2203sp1
docker
openEuler:22.03-LTS-SP2
 before engine-18.09.0-335.oe2203sp2
engine-18.09.0-335.oe2203sp2
docker
openEuler:22.03-LTS-SP3
 before engine-18.09.0-336.oe2203sp3
engine-18.09.0-336.oe2203sp3
docker.io-app
Ubuntu:Pro:20.04:LTS
 before 26.1.3-0ubuntu1~20.04.1+esm1, plus listed versions
20.10.25-0ubuntu1~20.04.120.10.25-0ubuntu1~20.04.224.0.5-0ubuntu1~20.04.124.0.7-0ubuntu2~20.04.126.1.3-0ubuntu1~20.04.1
26.1.3-0ubuntu1~20.04.1+esm1
docker.io-app
Ubuntu:22.04:LTS
 before 27.5.1-0ubuntu3~22.04.2, plus listed versions
20.10.25-0ubuntu1~22.04.120.10.25-0ubuntu1~22.04.224.0.5-0ubuntu1~22.04.124.0.7-0ubuntu2~22.04.126.1.3-0ubuntu1~22.04.127.5.1-0ubuntu3~22.04.1
27.5.1-0ubuntu3~22.04.2

History

History
RecordedChangedSources
affected, aliases, referencesOSV
aliasesEUVD
first indexedCVE List, GitHub Advisories, NVD, OSV

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

In short

CVE-2024-32473 is a medium vulnerability (CVSS 4.7) in Moby, published April 18, 2024. No source lists public exploit code. EPSS puts the chance of exploitation in the next 30 days at 0.35%, the 28th percentile. Fixed in github.com/docker/docker 26.0.2.

References

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