A new release of the Ubuntu Cloud Images for stable Ubuntu release 16.04 LTS (Xenial Xerus) is available at [1]. These new images superseded the existing images [2]. Images are available for download or immediate use on EC2 via publish AMI ids. Users who wish to update their existing installations can do so with:
   'sudo apt-get update && sudo apt-get dist-upgrade && sudo reboot'.

The following packages have been updated. Please see the full changelogs
for a complete listing of changes:
 * python3.5: 3.5.2-2ubuntu0~16.04.10 => 3.5.2-2ubuntu0~16.04.11 


The following is a complete changelog for this image.
new: {}
removed: {}
changed: ['libpython3.5-minimal:amd64', 'libpython3.5-stdlib:amd64', 'libpython3.5:amd64', 'python3.5', 'python3.5-minimal']
new snaps: {}
removed snaps: {}
changed snaps: []
==== python3.5: 3.5.2-2ubuntu0~16.04.10 => 3.5.2-2ubuntu0~16.04.11 ====
====     libpython3.5-minimal:amd64 libpython3.5-stdlib:amd64 libpython3.5:amd64 python3.5 python3.5-minimal
  * SECURITY UPDATE: Misleading information
    - debian/patches/CVE-2019-17514.patch: explain that the orderness of the
      of the result is system-dependant in Doc/library/glob.rst.
    - CVE-2019-17514
  * SECURITY UPDATE: Denial of service
    - debian/patches/CVE-2019-9674.patch: add pitfalls to
      zipfile module doc in Doc/library/zipfile.rst,
      Misc/NEWS.d/next/Documentation/2019-06-04-09-29-00.bpo-36260.WrGuc-.rst.
    - CVE-2019-9674
  * SECURITY UPDATE: Infinite loop
    - debian/patches/CVE-2019-20907.patch: avoid infinite loop in the
      tarfile module in Lib/tarfile.py, Lib/test/test_tarfile.py and add
      Lib/test/recursion.tar binary for test.
    - CVE-2019-20907
  * SECURITY UPDATE: Denial of service
    - debian/patches/CVE-2020-14422.patch: Resolve hash collisions for
      IPv4Interface and IPv6Interface in Lib/ipaddress.py,
      Lib/test/test_ipaddress.py.
    - CVE-2020-14422

--
[1] http://cloud-images.ubuntu.com/releases/xenial/release-20200723/
[2] http://cloud-images.ubuntu.com/releases/xenial/release-20200721/