GHSA-cxfp-7pvr-95ff

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GHSA-cxfp-7pvr-95ff

Summary: containerd CRI plugin: Incorrect cgroup hierarchy assignment for containers running in usernamespaced Kubernetes pods.

Details: # Impact A bug was found in the containerd's CRI implementation where containerd doesn't put usernamespaced containers under the Kubernetes' cgroup hierarchy, therefore some Kubernetes limits are not honored. This may cause a denial of service of the Kubernetes node. # Patches This bug has been fixed in containerd 2.0.5+ and 2.1.0+. Users should update to these versions to resolve the issue. # Workarounds Disable usernamespaced pods in Kubernetes temporarily. # Credits The containerd project would like to thank Rodrigo Campos Catelin and Piotr Rogowski for responsibly disclosing this issue in accordance with the [containerd security policy](https://github.com/containerd/project/blob/main/SECURITY.md). # For more information If you have any questions or comments about this advisory: * Open an issue in [containerd](https://github.com/containerd/containerd/issues/new/choose) * Email us at [email protected] To report a security issue in containerd: * [Report a new vulnerability](https://github.com/containerd/containerd/security/advisories/new) * Email us at [[email protected]](mailto:[email protected])

References: https://github.com/containerd/containerd/security/advisories/GHSA-cxfp-7pvr-95ff, https://nvd.nist.gov/vuln/detail/CVE-2025-47291, https://github.com/containerd/containerd, https://pkg.go.dev/vuln/GO-2025-3701