A new release of the Ubuntu Cloud Images for stable Ubuntu release 18.04 LTS (Bionic Beaver) 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 These new images superseded the existing images [2].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:
 * linux-meta: 4.15.0.111.99 => 4.15.0.112.100 
 * linux-signed: 4.15.0-111.112 => 4.15.0-112.113 
 * python3.6: 3.6.9-1~18.04ubuntu1 => 3.6.9-1~18.04ubuntu1.1 


The following is a complete changelog for this image.
new: {'linux-headers-4.15.0-112': '4.15.0-112.113', 'linux-modules-4.15.0-112-generic': '4.15.0-112.113', 'linux-headers-4.15.0-112-generic': '4.15.0-112.113'}
removed: {'linux-headers-4.15.0-111': '4.15.0-111.112', 'linux-headers-4.15.0-111-generic': '4.15.0-111.112', 'linux-modules-4.15.0-111-generic': '4.15.0-111.112'}
changed: ['libpython3.6-minimal:amd64', 'libpython3.6-stdlib:amd64', 'libpython3.6:amd64', 'linux-headers-generic', 'linux-headers-virtual', 'linux-image-4.15.0-112-generic', 'linux-image-virtual', 'linux-virtual', 'python3.6', 'python3.6-minimal']
new snaps: {}
removed snaps: {}
changed snaps: []
==== linux-meta: 4.15.0.111.99 => 4.15.0.112.100 ====
====     linux-headers-generic linux-headers-virtual linux-image-virtual linux-virtual
  * Bump ABI 4.15.0-112
  * Packaging resync (LP: #1786013)
    - [Packaging] resync debian/dkms-versions from main package
==== linux-signed: 4.15.0-111.112 => 4.15.0-112.113 ====
====     linux-image-4.15.0-112-generic
  * Master version: 4.15.0-112.113
==== python3.6: 3.6.9-1~18.04ubuntu1 => 3.6.9-1~18.04ubuntu1.1 ====
====     libpython3.6-minimal:amd64 libpython3.6-stdlib:amd64 libpython3.6:amd64 python3.6 python3.6-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/bionic/release-20200722/
[2] http://cloud-images.ubuntu.com/releases/bionic/release-20200717/