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Fencer Vulns
medium 6.6

CVE-2025-67499 json

CNI Plugins Portmap nftables backend intercepts non-local traffic

published 2025-12-09 11 mo ago modified 2026-10-14 25 d ago also EUVD-2025-202173 , GHSA-jv3w-x3r3-g6rm , GO-2025-4222

cvss
6.6
version 3.1, CNA
cisa kev
Not listed
not in CISA's catalog
epss
0.1%
EPSS 0.1% chance of exploitation in 30 days, percentile 3%
public exploits
0
none known

Summary

The CNI portmap plugin allows containers to emulate opening a host port, forwarding that traffic to the container. Versions 1.6.0 through 1.8.0 inadvertently forward all traffic with the same destination port as the host port when the portmap plugin is configured with the nftables backend, thus ignoring the destination IP. This includes traffic not intended for the node itself, i.e. traffic to containers hosted on the node. Containers that request HostPort forwarding can intercept all traffic destined for that port. This requires that the portmap plugin be explicitly configured to use the nftables backend. This issue is fixed in version 1.9.0. To workaround, configure the portmap plugin to use the iptables backend. It does not have this vulnerability.

Patch / fix

  • go github.com/containernetworking/plugins 1.9.0
  • cncf portmap 1.9.0
  • linuxfoundation cni_network_plugins 1.9.0
  • govulncheck-vulndb openSUSE Leap 15.6 0.0.20251230T014957-150000.1.134.1

suse advisories SUSE-SU-2026:0037-1

  • govulncheck-vulndb openSUSE Leap 16.0 0.0.20260723T184607-160000.1.1
  • docker openSUSE Tumbleweed 29.2.1_ce-37.1

opensuse advisories openSUSE-SU-2026:21483-1openSUSE-SU-2026:10261-1

  • singularity Alpine 3.24 4.3.6-r0

alpine advisories ALPINE-CVE-2025-67499

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-2025-67499 updated cvss 6.6

CNI portmap plugin: github.com/containernetworking/plugins/plugins/meta/portmap: CNI portmap plugin: HostPort forwarding vulnerability allows traffic interception

  • Red Hat Enterprise Linux 8 containernetworking-plugins Red Hat Enterprise Linux 9 containernetworking-plugins Red Hat OpenShift Container Platform 4 containernetworking-plugins, openshift4/microshift-bootc-rhel9, openshift4/ose-container-networking-plugins-rhel8, openshift4/ose-container-networking-plugins-rhel9, openshift4/container-networking-plugins-microshift-rhel9 Red Hat OpenShift Virtualization 4 container-native-virtualization/cnv-containernetworking-plugins, container-native-virtualization/cnv-containernetworking-plugins-rhel9
    affected: workaround, no fix available “Fix deferred”

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
10 mo ago

Exploit prediction

0.14% chance of exploitation in the next 30 days, higher than 3% of all scored CVEs (FIRST EPSS, 2026-11-08).

CVSS scores

assigned by version score vector
CNA 3.1 6.6 CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:H
GitHub 3.1 6.6 CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:H
NVD 3.1 3.6 CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:L/I:L/A:N

Affected packages

ecosystem package affected fixed in
go github.com/containernetworking/plugins
>=1.6.0, <1.9.0
1.9.0

Affected products

  • containernetworking plugins

Classification

Weakness
  • CWE-200 Exposure of Sensitive Information to an Unauthorized Actor

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.

CPEs and fixed versions use Anchore's correction of NVD's data: Added CPE configurations because not yet analyzed by NVD.