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

CVE-2025-47291 → View on GitHub ↗ View on CVE.org ↗ View on NVD ↗

Description

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.

For more information

If you have any questions or comments about this advisory:

To report a security issue in containerd:
* Report a new vulnerability
* Email us at [email protected]

Basic information

Type
reviewed
Severity
medium
Advisory on GitHub
Open advisory ↗
Repository advisory
Open repository advisory ↗
Source code
Browse source ↗
Published (advisory)
2025-05-21 18:01:48 UTC
Updated
2025-05-28 19:45:22 UTC
GitHub reviewed
2025-05-21 18:01:48 UTC
NVD published
2025-05-21

EPSS Score

Score Percentile
0.27% 50.51%

CVSS Scores

Base score Version Severity Vector
4.6 4.0 —
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 Click to expand
Attack vector (AV:L)
Attacker needs local access on the target system.
Attack complexity (AC:L)
Exploitation conditions are straightforward and stable.
Attack requirements (AT:N)
No additional preconditions are required beyond normal reachability.
Privileges required (PR:N)
No privileges are required.
User interaction (UI:N)
No user interaction is required.
Vulnerable system confidentiality impact (VC:N)
No confidentiality impact on the vulnerable system.
Vulnerable system integrity impact (VI:N)
No integrity impact on the vulnerable system.
Vulnerable system availability impact (VA:H)
High availability impact on the vulnerable system.
Subsequent system confidentiality impact (SC:N)
No confidentiality impact on subsequent systems.
Subsequent system integrity impact (SI:N)
No integrity impact on subsequent systems.
Subsequent system availability impact (SA:N)
No availability impact on subsequent systems.
Exploit maturity (threat) (E:U)
Unreported: no public PoC, no reported exploitation, and no known simplification tools.

Identifiers

Type Value
GHSA GHSA-cxfp-7pvr-95ff ↗
CVE CVE-2025-47291 ↗

CWEs

CWE id Name
CWE-266 Incorrect Privilege Assignment

Credits

  • rata (reporter)
  • rogowski-piotr (reporter)

Affected packages (1)

Vulnerable version ranges and first patched releases as published by GitHub.

Ecosystem Package Vulnerable range First patched Vulnerable functions
go github.com/containerd/containerd/v2 >= 2.0.1, <= 2.0.4 2.0.5 —

References

cvelogic Threat Intelligence