A new release of the Ubuntu Cloud Images for stable Ubuntu release 20.10 (Groovy Gorilla) 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 These new images superseded the existing images [2].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:
 * apt: 2.1.10 => 2.1.10ubuntu0.1 
 * linux-meta: 5.8.0.25.30 => 5.8.0.29.34 
 * linux-signed: 5.8.0-25.26 => 5.8.0-29.31 
 * python-apt: 2.1.3ubuntu1 => 2.1.3ubuntu1.2 


The following is a complete changelog for this image.
new: {'linux-headers-5.8.0-29': '5.8.0-29.31', 'linux-modules-5.8.0-29-generic': '5.8.0-29.31', 'linux-headers-5.8.0-29-generic': '5.8.0-29.31'}
removed: {'linux-modules-5.8.0-25-generic': '5.8.0-25.26', 'linux-headers-5.8.0-25-generic': '5.8.0-25.26', 'linux-headers-5.8.0-25': '5.8.0-25.26'}
changed: ['apt', 'apt-utils', 'libapt-pkg6.0:amd64', 'linux-headers-generic', 'linux-headers-virtual', 'linux-image-5.8.0-29-generic', 'linux-image-virtual', 'linux-virtual', 'python-apt-common', 'python3-apt']
new snaps: {}
removed snaps: {}
changed snaps: []
==== apt: 2.1.10 => 2.1.10ubuntu0.1 ====
====     apt apt-utils libapt-pkg6.0:amd64
  * SECURITY UPDATE: Integer overflow in parsing (LP: #1899193)
    - apt-pkg/contrib/arfile.cc: add extra checks.
    - apt-pkg/contrib/tarfile.cc: limit tar item sizes to 128 GiB
    - apt-pkg/deb/debfile.cc: limit control file sizes to 64 MiB
    - test/*: add tests.
    - CVE-2020-27350
  * Additional hardening:
    - apt-pkg/contrib/tarfile.cc: Limit size of long names and links to 1 MiB
  * .gitlab-ci.yml: Test on groovy, not unstable
==== linux-meta: 5.8.0.25.30 => 5.8.0.29.34 ====
====     linux-headers-generic linux-headers-virtual linux-image-virtual linux-virtual
  * Bump ABI 5.8.0-29
  * Packaging resync (LP: #1786013)
    - [Packaging] resync debian/dkms-versions from main package
  * Bump ABI 5.8.0-28
  * Bump ABI 5.8.0-27
  * Bump ABI 5.8.0-26
  * Packaging resync (LP: #1786013)
    - [Packaging] resync debian/dkms-versions from main package
==== linux-signed: 5.8.0-25.26 => 5.8.0-29.31 ====
====     linux-image-5.8.0-29-generic
  * Master version: 5.8.0-29.31
  * Master version: 5.8.0-28.30
  * Master version: 5.8.0-27.29
  * Master version: 5.8.0-26.27
==== python-apt: 2.1.3ubuntu1 => 2.1.3ubuntu1.2 ====
====     python-apt-common python3-apt
  * Fix regression in data/templates/Ubuntu.info.in versus the release
    pocket.  LP: #1907496.
  * SECURITY UPDATE: various memory and file descriptor leaks (LP: #1899193)
    - python/arfile.cc, python/generic.h, python/tag.cc, python/tarfile.cc:
      fix file descriptor and memory leaks
    - python/apt_instmodule.cc, python/apt_instmodule.h, python/arfile.h:
      Avoid reference cycle with control,data members in apt_inst.DebFile
      objects
    - tests/test_cve_2020_27351.py: Test cases for DebFile (others not easily
      testable)
    - CVE-2020-27351
  * .gitlab-ci.yml: Fix mypy and Ubuntu version for CI
  * data/templates: Update mirror lists

--
[1] http://cloud-images.ubuntu.com/releases/groovy/release-20201210/
[2] http://cloud-images.ubuntu.com/releases/groovy/release-20201209.1/