containerd affected by a local privilege escalation via wide permissions on CRI directory

Summary

containerd is an open-source container runtime. Versions 0.1.0 through 1.7.28, 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 have an overly broad default permission vulnerability. Directory paths `/var/lib/containerd`, `/run/containerd/io.containerd.grpc.v1.cri` and `/run/containerd/io.containerd.sandbox.controller.v1.shim` were all created with incorrect permissions. This issue is fixed in versions 1.7.29, 2.0.7, 2.1.5 and 2.2.0. Workarounds include updating system administrator permissions so the host can manually chmod the directories to not have group or world accessible permissions, or to run containerd in rootless mode.

Timeline

1. Nov 6, 2025, 6:36 PM UTCCVE published
2. Nov 6, 2025, 7:34 PM UTCCISA SSVC assessment

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

3. Nov 6, 2025, 7:35 PM UTCRecord last updated

Affected versions

• containerd containerd

  fixed in 1.7.29; From 2.0.0-beta.0 · fixed in 2.0.7; From 2.1.0-beta.0 · fixed in 2.1.5; From 2.2.0-beta.0 · fixed in 2.2.0

• github.com/containerd/containerdGo

  fixed in 1.7.29

• github.com/containerd/containerd/v2Go

  fixed in 2.0.7

• github.com/containerd/containerd/v2Go

  From 2.1.0-beta.0 · fixed in 2.1.5

• github.com/containerd/containerd/v2Go

  From 2.2.0-beta.0 · fixed in 2.2.0

• github.com/containerd/containerd/v2Go

  fixed in 2.0.7; From 2.1.0-beta.0 · fixed in 2.1.5; From 2.2.0-beta.0 · fixed in 2.2.0

References 3