CVE-2025-64329: containerd CRI server: Host memory exhaustion through Attach goroutine leak

Severity: medium (CVSS 5.5 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 0.2% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2025-11-07 · updated 2026-06-17
Weakness: CWE-401

Description

containerd is an open-source container runtime. Versions 1.7.28 and below, 2.0.0-beta.0 through 2.0.6, 2.1.0-beta.0 through 2.1.4, and 2.2.0-beta.0 through 2.2.0-rc.1 contain a bug in the CRI Attach implementation where a user can exhaust memory on the host due to goroutine leaks. This issue is fixed in versions 1.7.29, 2.0.7, 2.1.5 and 2.2.0. To workaround this vulnerability, users can set up an admission controller to control accesses to pods/attach resources.

Affected products

containerd: before 1.7.29; from 2.0.0 before 2.0.7; from 2.1.0 before 2.1.5; 2.2.0-beta0, 2.2.0-beta1, 2.2.0-beta2, 2.2.0-rc0, 2.2.0-rc1 — fixed in 1.7.29, 2.0.7, 2.1.5

How to fix

Upgrade to a fixed version: containerd 1.7.29, 2.0.7, 2.1.5. Check the vendor advisory for mitigations.

References

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