Docker run Error: "unsupported shim version (3): not implemented"

Docker Engine General
1

Hello,

I just installed docker on my computer. Every time I run docker run hello-world (or any other container for that matter), I get the error:

docker: Error response from daemon: failed to create task for container: Unimplemented: failed to start shim: start failed: unsupported shim version (3): not implemented

System Details

  • OS: Fedora 42
  • Architecture: x86-64

Docker Version

Client: Docker Engine - Community
Version: 28.3.3
API version: 1.51
Go version: go1.24.5
Git commit: 980b856
Built: Fri Jul 25 11:36:40 2025
OS/Arch: linux/amd64
Context: default

Server: Docker Engine - Community
Engine:
Version: 28.3.3
API version: 1.51 (minimum version 1.24)
Go version: go1.24.5
Git commit: bea959c
Built: Fri Jul 25 11:33:31 2025
OS/Arch: linux/amd64
Experimental: false
containerd:
Version: 1.7.27
GitCommit: 05044ec0a9a75232cad458027ca83437aae3f4da
runc:
Version: 1.2.5
GitCommit: v1.2.5-0-g59923ef
docker-init:
Version: 0.19.0
GitCommit: de40ad0

What I’ve Tried

  • Restart Docker
  • Restart Containerd
  • Re-install Docker
  • Added `'{ "default-runtime": "runc" }`` to /etc/docker/daemon.json

Any help would be greatly appreciated.

2

How did you install Docker? Did you have containerd or other Docker version installed before?

If it says the shim version is unsupported, and if 3 means it is using v3, a failed upgrade could cause the issue. I found this for example

3

Fixed it. It seems I had installed containerd version 1.7. Upgrading it to 2.1 fixed it.

4

1.7 is actually the correct version usually. I don’t remember any environment where I had v2. I’m not sure what will happen when you upgrade Docker. Hopefully containerd will not be overwritten again, but if anyone sees Containerd v1.7 currently, don’t worry, that is the version that you get when you install Docker CE the official way.

5

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