CVE-2025-47291
Description
A vulnerability has been identified in containerd's Container Runtime Interface (CRI) implementation, affecting versions from 2.0.1 up to, but not including, 2.0.5. The flaw lies in the fact that containerd does not correctly place usernamespaced containers within the Kubernetes cgroup hierarchy. As a result, Kubernetes-defined resource limits for these containers are not properly enforced. This issue can lead to uncontrolled resource consumption by affected containers, potentially exhausting the resources of the Kubernetes node and resulting in a denial-of-service condition for the entire node.
Mitigation
This vulnerability has been resolved in containerd versions 2.0.5 and later, as well as 2.1.0 and later. We recommend upgrading all affected containerd installations to these versions to remediate the issue.
As a temporary workaround, if immediate upgrade is not feasible, temporarily disable usernamespaced pods within your Kubernetes environment.
Common Vulnerability Scoring System (CVSS) Score Details
Info alert:Important note
CVSS scores for open source components depend on vendor-specific factors (e.g. version or build chain). Therefore, Red Hat's score and impact rating can be different from NVD and other vendors. Red Hat remains the authoritative CVE Naming Authority (CNA) source for its products and services (see Red Hat classifications).
The following CVSS metrics and score provided are preliminary and subject to review.
CVSS v3 Score Breakdown
| Red Hat | NVD | cve.org | |
|---|---|---|---|
| Base Score | 6.3 | 7.5 | N/A |
| Attack Vector | Network | Network | N/A |
| Attack Complexity | Low | Low | N/A |
| Privileges Required | Low | None | N/A |
| User Interaction | None | None | N/A |
| Scope | Unchanged | Unchanged | N/A |
| Confidentiality | Low | None | N/A |
| Integrity Impact | Low | None | N/A |
| Availability Impact | Low | High | N/A |
Vector
Red Hat: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:L
NVD: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Understanding the Weakness (CWE)
Access Control
Technical Impact: Gain Privileges or Assume Identity
A user can access restricted functionality and/or sensitive information that may include administrative functionality and user accounts.
Frequently Asked Questions
Not sure what something means? Check out our Security Glossary.
Want to get errata notifications? Sign up here.
