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 These new images superseded the existing images [2].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:
 * glib2.0: 2.66.1-2ubuntu0.1 => 2.66.1-2ubuntu0.2 
 * isc-dhcp: 4.4.1-2.1ubuntu9 => 4.4.1-2.1ubuntu10 
 * linux-meta: 5.8.0.45.50 => 5.8.0.48.53 
 * linux-signed: 5.8.0-45.51 => 5.8.0-48.54 
 * systemd: 246.6-1ubuntu1.1 => 246.6-1ubuntu1.2 


The following is a complete changelog for this image.
new: {'linux-headers-5.8.0-48': '5.8.0-48.54', 'linux-headers-5.8.0-48-generic': '5.8.0-48.54', 'linux-modules-5.8.0-48-generic': '5.8.0-48.54'}
removed: {'linux-headers-5.8.0-45': '5.8.0-45.51', 'linux-modules-5.8.0-45-generic': '5.8.0-45.51', 'linux-headers-5.8.0-45-generic': '5.8.0-45.51'}
changed: ['isc-dhcp-client', 'isc-dhcp-common', 'libglib2.0-0:amd64', 'libglib2.0-bin', 'libglib2.0-data', 'libnss-systemd:amd64', 'libpam-systemd:amd64', 'libsystemd0:amd64', 'libudev1:amd64', 'linux-headers-generic', 'linux-headers-virtual', 'linux-image-5.8.0-48-generic', 'linux-image-virtual', 'linux-virtual', 'systemd', 'systemd-sysv', 'systemd-timesyncd', 'udev']
new snaps: {}
removed snaps: {}
changed snaps: ['lxd', 'snapd']
==== glib2.0: 2.66.1-2ubuntu0.1 => 2.66.1-2ubuntu0.2 ====
====     libglib2.0-0:amd64 libglib2.0-bin libglib2.0-data
  * SECURITY UPDATE: incorrect g_file_replace() symlink handling
    - debian/patches/CVE-2021-28153-1.patch: fix a typo in a comment in
      gio/glocalfileoutputstream.c.
    - debian/patches/CVE-2021-28153-2.patch: stop using g_test_bug_base()
      in file tests in gio/tests/file.c.
    - debian/patches/CVE-2021-28153-3.patch: factor out a flag check in
      gio/glocalfileoutputstream.c.
    - debian/patches/CVE-2021-28153-4.patch: fix CREATE_REPLACE_DESTINATION
      with symlinks in gio/glocalfileoutputstream.c, gio/tests/file.c.
    - debian/patches/CVE-2021-28153-5.patch: add a missing O_CLOEXEC flag
      to replace() in gio/glocalfileoutputstream.c.
    - CVE-2021-28153
==== isc-dhcp: 4.4.1-2.1ubuntu9 => 4.4.1-2.1ubuntu10 ====
====     isc-dhcp-client isc-dhcp-common
  * Fix env variable for INTERFACES (LP: #1894172)
    - d/isc-dhcp-server.isc-dhcp-server{,6}.service: Replace $INTERFACES
      variable with $INTERFACEv4 and $INTERFACESv6, respectively, for
      respective services file.
==== linux-meta: 5.8.0.45.50 => 5.8.0.48.53 ====
====     linux-headers-generic linux-headers-virtual linux-image-virtual linux-virtual
  * Bump ABI 5.8.0-48
  * Bump ABI 5.8.0-47
  * Packaging resync (LP: #1786013)
    - [Packaging] resync debian/dkms-versions from main package
  * Bump ABI 5.8.0-46
  * Packaging resync (LP: #1786013)
    - [Packaging] resync debian/dkms-versions from main package
==== linux-signed: 5.8.0-45.51 => 5.8.0-48.54 ====
====     linux-image-5.8.0-48-generic
  * Master version: 5.8.0-48.54
  * Master version: 5.8.0-47.53
  * Master version: 5.8.0-46.52
==== systemd: 246.6-1ubuntu1.1 => 246.6-1ubuntu1.2 ====
====     libnss-systemd:amd64 libpam-systemd:amd64 libsystemd0:amd64 libudev1:amd64 systemd systemd-sysv systemd-timesyncd udev
  [ Ioanna Alifieraki ]
  * d/p/lp1911187-systemctl-do-not-shutdown-immediately-on-scheduled-shutdo.patch:
    Do not shutdown immediately when scheduled shutdown fails (LP: #1911187)
    https://git.launchpad.net/~ubuntu-core-dev/ubuntu/+source/systemd/commit/?id=bbca658178d27e0ffaf759ba3115878d26c917a6
  [ Dan Streetman ]
  * d/p/debian/patches/lp1880258-log-nxdomain-as-debug.patch:
    Change NXDOMAIN 'errors' to log level debug (LP: #1880258)
    https://git.launchpad.net/~ubuntu-core-dev/ubuntu/+source/systemd/commit/?id=b8e864eb907469616d688eab39b20491693d7c3a
  * d/p/lp1913763-udev-rules-add-rule-to-create-dev-ptp_hyperv.patch:
    Create symlink for hyperv-provided ptp device (LP: #1913763)
    https://git.launchpad.net/~ubuntu-core-dev/ubuntu/+source/systemd/commit/?id=83c7476c80e4139ee7c1ec18a549c30d37d3b4b2

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[1] http://cloud-images.ubuntu.com/releases/groovy/release-20210323/
[2] http://cloud-images.ubuntu.com/releases/groovy/release-20210315/