🛡️ CVE-2025-64329 — containerd

🟡 CVSS 5.5 — Medium ✅ No Known Exploit CWE-401 NVD
5.5
CVSS Score
0 Low4 Medium7 High9 Critical10

Description

containerd CRI server: Host memory exhaustion through Attach goroutine leak

Impact

A bug was found in containerd's CRI Attach implementation where a user can exhaust memory on the host due to goroutine leaks.

Repetitive calls of CRI Attach (e.g., [kubectl attach](https://kubernetes.io/docs/reference/kubectl/generated/kubectl_attach/)) could increase the memory usage of containerd.

Patches

This bug has been fixed in the following containerd versions:

  • 2.2.0
  • 2.1.5
  • 2.0.7
  • 1.7.29

Users should update to these versions to resolve the issue.

Workarounds

Set up an admission controller to control accesses to pods/attach resources.

e.g., [Validating Admission Policy](https://kubernetes.io/docs/reference/access-authn-authz/validating-admission-policy/).

Credits

The containerd project would like to thank @Wheat2018 for responsibly disclosing this issue in accordance with the [containerd security policy](https://github.com/containerd/project/blob/main/SECURITY.md).

References

https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2025-64329

For more information

If you have any questions or comments about this advisory:

To report a security issue in containerd:

  • [Report a new vulnerability](https://github.com/containerd/containerd/security/advisories/new)

How this vulnerability can be exploited

This issue can be reached with local access to the system, attack complexity is low, an attacker needs low-level privileges on the target. No user interaction is required. The scope is unchanged, so the impact stays within the vulnerable component. Rated impact: confidentiality none, integrity none, availability high.

Weakness class

CVE-2025-64329 is classified as CWE-401: Memory Leak. Allocated memory is never released, so long-running or repeated operations gradually exhaust it.

Affected software

CVE-2025-64329 is recorded against 3 packages.

  • containerd
  • github.com/containerd/containerd
  • github.com/containerd/containerd/v2

Timeline and source

Published on 7 November 2025 and last revised on 17 June 2026. No public exploit is currently recorded for this entry. A vendor advisory or fix has been published. Record sourced from NVD.

References

github.com
github.com

CVE-2025-64329 on other distributions

Each distribution ships its own build and its own fixed version. Pick the one you run:

Details

Severity MEDIUM
CVSS Score 5.5
CVSS Vector CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
CWE CWE-401
Public Exploit ✅ No
Source NVD
Published 2025-11-07
Updated 2026-08-12
Modified 2026-06-17

Affected Packages

Software From version Fixed in
containerd — —
github.com/containerd/containerd — —
github.com/containerd/containerd/v2 — —

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