CVE-2025-47291: containerd CRI plugin: Incorrect cgroup hierarchy assignment for containers running in usernamespaced Kubernetes pods.
Description
containerd is an open-source container runtime. A bug was found in the containerd's CRI implementation where containerd, starting in version 2.0.1 and prior to version 2.0.5, 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. This bug has been fixed in containerd 2.0.5+ and 2.1.0+. Users should update to these versions to resolve the issue. As a workaround, disable usernamespaced pods in Kubernetes temporarily.
Classification
CVE ID: CVE-2025-47291
CVSS Base Severity: MEDIUM
CVSS Base Score: 4.6
CVSS Vector: CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:U
Problem Types
CWE-266: Incorrect Privilege AssignmentAffected Products
Vendor: containerd
Product: containerd
Exploit Prediction Scoring System (EPSS)
EPSS Score: 0.02% (probability of being exploited)
EPSS Percentile: 2.95% (scored less or equal to compared to others)
EPSS Date: 2025-06-19 (when was this score calculated)
References
https://nvd.nist.gov/vuln/detail/CVE-2025-47291https://github.com/containerd/containerd/security/advisories/GHSA-cxfp-7pvr-95ff