containerd image-triggered runtime DoS via unbounded group parsing

Summary

containerd is an open-source container runtime. Versions prior to 1.7.33, 2.0.10, 2.1.9, 2.2.5 and 2.3.2, contain a vulnerability that allows a maliciously crafted image to cause a Denial of Service (DoS) condition. When creating a container from this image, memory exhaustion occurs, leading to an Out Of Memory (OOM) kill of the containerd process. This renders the container runtime API unavailable and can disrupt clients such as the Docker Engine or Kubernetes control-plane components. This issue has been fixed in versions 1.7.33, 2.0.10, 2.1.9, 2.2.5 and 2.3.2.

Timeline

1. Jul 1, 2026, 5:48 PM UTCCVE published
2. Jul 1, 2026, 6:33 PM UTCCISA SSVC assessment

   Exploitation: none · Automatable: no · Technical impact: partial

3. Jul 1, 2026, 6:34 PM UTCRecord last updated

Affected versions

• containerd containerd

  From 1.7.0 · fixed in 1.7.33; From 2.0.0 · fixed in 2.0.10; From 2.1.0 · fixed in 2.1.9; From 2.2.0 · fixed in 2.2.5; From 2.3.0 · fixed in 2.3.2

• github.com/containerd/containerdGo

  From 1.7.0 · fixed in 1.7.33

• github.com/containerd/containerd/v2Go

  From 2.0.0 · fixed in 2.0.10; From 2.1.0 · fixed in 2.1.9; From 2.2.0 · fixed in 2.2.5; From 2.3.0 · fixed in 2.3.2

• github.com/containerd/containerd/v2Go

  From 2.0.0 · fixed in 2.0.10

• github.com/containerd/containerd/v2Go

  From 2.1.0 · fixed in 2.1.9

• github.com/containerd/containerd/v2Go

  From 2.2.0 · fixed in 2.2.5

• github.com/containerd/containerd/v2Go

  From 2.3.0 · fixed in 2.3.2

References 1