Bug: docker-ce 5:27.4.0-1 "Cannot open TUN/TAP dev /dev/net/tun: Operation not permitted (errno=1)"

[anipad]

Since today's docker upgrade container exits fatally with:

2024-12-09 21:36:21 ERROR: Cannot open TUN/TAP dev /dev/net/tun: Operation not permitted (errno=1)
2024-12-09 21:36:21 Exiting due to fatal error

No changes were introduced before the upgrade with a working container. The following additions did not fix this issue:

- /dev/net/tun:/dev/net/tun

- modprobe tun

- privileged: true

Same fatal error.

If this is still maintained, I would appreciate a response. Thank you

Probably already known, please see
#qdm12/gluetun#2606
#haugene/docker-transmission-openvpn#2883
#haugene/docker-transmission-openvpn#2900

[anipad]

chmod 666 /dev/net/tun on docker host did also not fix this issue.