CVE-2025-67499

A flaw was found in the CNI (Container Network Interface) portmap plugin. This vulnerability allows containers to intercept all traffic destined for a host port via inadvertent forwarding of traffic with the same destination port when the plugin is configured with the nftables backend, ignoring the destination IP.

This vulnerability is rated Moderate for Red Hat because it allows containers to intercept non-local traffic when the CNI portmap plugin is explicitly configured to use the nftables backend. This issue affects CNI portmap plugin versions 1.6.0 through 1.8.0. Red Hat products are only affected if the nftables backend is specifically enabled for the CNI portmap plugin.

The CVSS score(s) listed for this vulnerability do not reflect the associated product's status, and are included for informational purposes to better understand the severity of this vulnerability.

Configure the CNI portmap plugin to use the iptables backend instead of nftables. This can typically be achieved by modifying the CNI network configuration. After making this configuration change, services utilizing the CNI portmap plugin may require a restart or reload for the changes to take effect.