Ubuntu 24.04. /proc/<pid>/net/ns Permission denied

[jonasgrunert]

Hi,
when I execute the setup (slirp4netns --configure --mtu=65520 --disable-host-loopback $(cat /tmp/pid) tap0) from usage I get the following error:

/proc/141833/ns/net: Permission denied
child failed(1)

Where 141833 is the PID of the unshare process. The output of ls -lZ /proc/141833/ns/net yields:

lrwxrwxrwx 1 ubuntu ubuntu ? 0 Nov 19 13:49 /proc/141833/ns/net -> 'net:[4026532388]'

So I am very lost on where the issue might be. Do you have any ideas?