====== reopen fd 8: permission denied: unknown ======

<code>
docker: Error response from daemon: failed to create task for container: failed to create shim task: OCI runtime create failed: runc create failed: unable to start container process: error during container init: open sysctl net.ipv4.ip_unprivileged_port_start file: reopen fd 8: permission denied: unknown
</code>

Environment: Latest Docker CE on Debian 13 in Proxmox LXC container.

**Workaround** for Debian 13 (in LXC):
<code bash>
apt-get install containerd.io=1.7.28-1~debian.13~trixie
</code>

**Solution** (Proxmox host):

It is fixed in Proxmox 9.1 in ''lxc-pve'' version '' 6.0.5-2''
<code bash>
apt install --only-upgrade lxc-pve
</code>

**References:**

  * [[https://forums.docker.com/t/docker-fails-to-run-on-debian-bullseye-after-update-unable-to-start-container-process-error-during-container-init-open-sysctl-net-ipv4-ip-unprivileged-port-start-file-reopen-fd-8-permission-denied-unknown/150363]]
  * [[https://forum.proxmox.com/threads/docker-inside-lxc-net-ipv4-ip_unprivileged_port_start-error.175437/page-2#post-814949]]