A new release of the Ubuntu Cloud Images for stable Ubuntu release 21.10 (Impish Indri) 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 These new images superseded the existing images [2].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:
 * apport: 2.20.11-0ubuntu70 => 2.20.11-0ubuntu71 
 * bind9: 1:9.16.15-1ubuntu1 => 1:9.16.15-1ubuntu1.1 
 * distro-info-data: 0.51ubuntu1 => 0.51ubuntu1.1 
 * linux-meta: 5.13.0.19.30 => 5.13.0.20.31 
 * linux-signed: 5.13.0-19.19 => 5.13.0-20.20 
 * tzdata: 2021a-2ubuntu1 => 2021e-0ubuntu0.21.10 
 * update-manager: 1:21.10.4 => 1:21.10.5 
 * util-linux: 2.36.1-8ubuntu1 => 2.36.1-8ubuntu2 


The following is a complete changelog for this image.
new: {'linux-modules-5.13.0-20-generic': '5.13.0-20.20', 'linux-headers-5.13.0-20': '5.13.0-20.20', 'linux-headers-5.13.0-20-generic': '5.13.0-20.20'}
removed: {'linux-modules-5.13.0-19-generic': '5.13.0-19.19', 'linux-headers-5.13.0-19': '5.13.0-19.19', 'linux-headers-5.13.0-19-generic': '5.13.0-19.19'}
changed: ['apport', 'bind9-dnsutils', 'bind9-host', 'bind9-libs:amd64', 'bsdextrautils', 'bsdutils', 'distro-info-data', 'eject', 'fdisk', 'libblkid1:amd64', 'libfdisk1:amd64', 'libmount1:amd64', 'libsmartcols1:amd64', 'libuuid1:amd64', 'linux-headers-generic', 'linux-headers-virtual', 'linux-image-5.13.0-20-generic', 'linux-image-virtual', 'linux-virtual', 'mount', 'python3-apport', 'python3-problem-report', 'python3-update-manager', 'tzdata', 'update-manager-core', 'util-linux', 'uuid-runtime']
new snaps: {}
removed snaps: {}
changed snaps: ['lxd', 'snapd']
==== apport: 2.20.11-0ubuntu70 => 2.20.11-0ubuntu71 ====
====     apport python3-apport python3-problem-report
  * SECURITY UPDATE: Privilege escalation via core files
    - refactor privilege dropping and create core files in a well-known
      directory in apport/fileutils.py, apport/report.py, data/apport,
      test/test_fileutils.py, test/test_report.py,
      test/test_signal_crashes.py, test/test_ui.py.
    - use systemd-tmpfiles to create and manage the well-known core file
      directory in setup.py, data/systemd/apport.conf,
      debian/apport.install.
==== bind9: 1:9.16.15-1ubuntu1 => 1:9.16.15-1ubuntu1.1 ====
====     bind9-dnsutils bind9-host bind9-libs:amd64
  * SECURITY UPDATE: resolver performance degradation via lame cache abuse
    - debian/patches/CVE-2021-25219.patch: disable lame cache in
      bin/named/config.c, bin/named/server.c, lib/dns/resolver.c.
    - CVE-2021-25219
==== distro-info-data: 0.51ubuntu1 => 0.51ubuntu1.1 ====
====     distro-info-data
  * Add Ubuntu 22.04, Jammy Jellyfish (LP: #1947368).
==== linux-meta: 5.13.0.19.30 => 5.13.0.20.31 ====
====     linux-headers-generic linux-headers-virtual linux-image-virtual linux-virtual
  * Bump ABI 5.13.0-20
  * Packaging resync (LP: #1786013)
    - [Packaging] resync debian/dkms-versions from main package
==== linux-signed: 5.13.0-19.19 => 5.13.0-20.20 ====
====     linux-image-5.13.0-20-generic
  * Master version: 5.13.0-20.20
==== tzdata: 2021a-2ubuntu1 => 2021e-0ubuntu0.21.10 ====
====     tzdata
  * New upstream release (LP: #1948698), affecting the following timestamp:
    - Palestine will fall back 2021-10-29 (not 2021-10-30) at 01:00.
  * Update ICU timezone data files which are utilized by php to 2021a3.
  * Dropped the patches which were cherry-picked from upstream as the
    situation is somewhat less confused now.
==== update-manager: 1:21.10.4 => 1:21.10.5 ====
====     python3-update-manager update-manager-core
  * UpdateManager/backend/__init__.py: When checking for snap seeds also
    take into consideration whether or not the metapackage associated with the
    snap is installed. (LP: #1947501)
==== util-linux: 2.36.1-8ubuntu1 => 2.36.1-8ubuntu2 ====
====     bsdextrautils bsdutils eject fdisk libblkid1:amd64 libfdisk1:amd64 libmount1:amd64 libsmartcols1:amd64 libuuid1:amd64 mount util-linux uuid-runtime
  * Fix HiFive partition names (LP: #1944741)
    - include: Rename HiFive partition UUIDs
    - po: Update translations after changes to HiFive partition names

--
[1] http://cloud-images.ubuntu.com/releases/impish/release-20211102/
[2] http://cloud-images.ubuntu.com/releases/impish/release-20211014/