https://bugzilla.suse.com/show_bug.cgi?id=1239596 Bug ID: 1239596 Summary: Internal networks are not isolated in docker-stable Classification: openSUSE Product: openSUSE Tumbleweed Version: Current Hardware: Other OS: Other Status: NEW Severity: Normal Priority: P5 - None Component: Containers Assignee: containers-bugowner@suse.de Reporter: rbranco@suse.com QA Contact: qa-bugs@suse.de Target Milestone: --- Found By: --- Blocker: --- OS: openSUSE Tumbleweed 20250211 docker-stable version 24.0.9-ce To reproduce: # docker network create --ipv6 --subnet 2001:db8::/64 --internal test # docker run --rm --network test registry.opensuse.org/opensuse/toolbox ping -4 -c 1 Expected output: ping: connect: Network is unreachable Notes: - The above commands also fail in rootless mode. - The above commands do not fail with latest docker 27.5.1-ce - Only with docker-stable is `--subnet 2001:db8::/64` needed, otherwise it fails with: Error response from daemon: could not find an available, non-overlapping IPv6 address pool among the defaults to assign to the network -- You are receiving this mail because: You are on the CC list for the bug.