Verified for focal-victoria using the test script in comment #33

ubuntu@node-lepaute:~$ dpkg -l | grep pyroute2
ii  python3-pyroute2                     0.5.14-0ubuntu1~cloud0                all          Python3 Netlink library
ubuntu@node-lepaute:~$ echo 63 | sudo tee /sys/class/net/enp3s0f0/device/sriov_numvfs
63
ubuntu@node-lepaute:~$ ./test-lp1904730.sh 
Traceback (most recent call last):
  File "/usr/lib/python3/dist-packages/pyroute2/netlink/__init__.py", line 1345, in _ft_decode_generic
    self.decode_nlas(offset)
  File "/usr/lib/python3/dist-packages/pyroute2/netlink/__init__.py", line 1469, in decode_nlas
    (length, base_msg_type) = struct.unpack_from('HH', self.data,
struct.error: unpack_from requires a buffer of at least 19212 bytes for unpacking 4 bytes at offset 19208 (actual buffer size is 16384)

During handling of the above exception, another exception occurred:

Traceback (most recent call last):
  File "./test-lp1904730.sh", line 7, in <module>
    link = ip.link('get', index=link_idx, ext_mask=1)[0]
  File "/usr/lib/python3/dist-packages/pyroute2/iproute/linux.py", line 1358, in link
    ret = self.nlm_request(msg,
  File "/usr/lib/python3/dist-packages/pyroute2/netlink/nlsocket.py", line 376, in nlm_request
    return tuple(self._genlm_request(*argv, **kwarg))
  File "/usr/lib/python3/dist-packages/pyroute2/netlink/nlsocket.py", line 867, in nlm_request
    for msg in self.get(msg_seq=msg_seq,
  File "/usr/lib/python3/dist-packages/pyroute2/netlink/nlsocket.py", line 379, in get
    return tuple(self._genlm_get(*argv, **kwarg))
  File "/usr/lib/python3/dist-packages/pyroute2/netlink/nlsocket.py", line 704, in get
    raise msg['header']['error']
  File "/usr/lib/python3/dist-packages/pyroute2/netlink/nlsocket.py", line 177, in parse
    msg.decode()
  File "/usr/lib/python3/dist-packages/pyroute2/netlink/rtnl/ifinfmsg/__init__.py", line 1092, in decode
    nlmsg.decode(self)
  File "/usr/lib/python3/dist-packages/pyroute2/netlink/__init__.py", line 1016, in decode
    self._ft_decode(self, offset)
  File "/usr/lib/python3/dist-packages/pyroute2/netlink/__init__.py", line 1348, in _ft_decode_generic
    raise NetlinkNLADecodeError(e)
pyroute2.netlink.exceptions.NetlinkNLADecodeError: unpack_from requires a buffer of at least 19212 bytes for unpacking 4 bytes at offset 19208 (actual buffer size is 16384)

ubuntu@node-lepaute:~$ sudo add-apt-repository cloud-archive:victoria-proposed
 Ubuntu Cloud Archive for OpenStack Victoria [proposed]
 More info: https://wiki.ubuntu.com/OpenStack/CloudArchive
Press [ENTER] to continue or Ctrl-c to cancel adding it.
...

ubuntu@node-lepaute:~$ sudo apt-get upgrade python3-pyroute2
Reading package lists... Done
Building dependency tree       
Reading state information... Done
Calculating upgrade... Done
The following packages will be upgraded:
  alsa-ucm-conf apport cloud-init distro-info-data libnetplan0 netplan.io open-vm-tools python3-apport python3-cryptography python3-importlib-metadata python3-openssl python3-problem-report python3-pyroute2
  python3-requests squashfs-tools
15 upgraded, 0 newly installed, 0 to remove and 0 not upgraded.
5 standard security updates
Need to get 2287 kB of archives.
After this operation, 977 kB of additional disk space will be used.
...
ubuntu@node-lepaute:~$ dpkg -l | grep pyroute2
ii  python3-pyroute2                     0.5.14-0ubuntu1~cloud1                all          Python3 Netlink library
ubuntu@node-lepaute:~$ ./test-lp1904730.sh 
63
ubuntu@node-lepaute:~$