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 These new images superseded the existing images [2].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:
 * grub2: 2.02-2ubuntu8.20 => 2.02-2ubuntu8.21 
 * grub2-signed: 1.93.22+2.02-2ubuntu8.20 => 1.93.24+2.02-2ubuntu8.21 
 * linux-meta: 4.15.0.130.117 => 4.15.0.132.119 
 * linux-signed: 4.15.0-130.134 => 4.15.0-132.136 
 * sosreport: 3.9.1-1ubuntu0.18.04.2 => 3.9.1-1ubuntu0.18.04.3 
 * systemd: 237-3ubuntu10.43 => 237-3ubuntu10.44 
 * tar: 1.29b-2ubuntu0.1 => 1.29b-2ubuntu0.2 


The following is a complete changelog for this image.
new: {'linux-modules-4.15.0-132-generic': '4.15.0-132.136', 'linux-headers-4.15.0-132-generic': '4.15.0-132.136', 'linux-headers-4.15.0-132': '4.15.0-132.136'}
removed: {'linux-headers-4.15.0-130': '4.15.0-130.134', 'linux-modules-4.15.0-130-generic': '4.15.0-130.134', 'linux-headers-4.15.0-130-generic': '4.15.0-130.134'}
changed: ['grub-common', 'grub-efi-amd64-bin', 'grub-efi-amd64-signed', 'grub-pc', 'grub-pc-bin', 'grub2-common', 'libnss-systemd:amd64', 'libpam-systemd:amd64', 'libsystemd0:amd64', 'libudev1:amd64', 'linux-headers-generic', 'linux-headers-virtual', 'linux-image-4.15.0-132-generic', 'linux-image-virtual', 'linux-virtual', 'sosreport', 'systemd', 'systemd-sysv', 'tar', 'udev']
new snaps: {}
removed snaps: {}
changed snaps: []
==== grub2: 2.02-2ubuntu8.20 => 2.02-2ubuntu8.21 ====
====     grub-common grub-efi-amd64-bin grub-pc grub-pc-bin grub2-common
  * d/build-efi-images:
    - Add xfs module to signed UEFI images
      (Closes: #911147) (LP: #1652822)
==== grub2-signed: 1.93.22+2.02-2ubuntu8.20 => 1.93.24+2.02-2ubuntu8.21 ====
====     grub-efi-amd64-signed
==== linux-meta: 4.15.0.130.117 => 4.15.0.132.119 ====
====     linux-headers-generic linux-headers-virtual linux-image-virtual linux-virtual
  * Bump ABI 4.15.0-132
  * Bump ABI 4.15.0-131
  * Packaging resync (LP: #1786013)
    - [Packaging] resync debian/dkms-versions from main package
==== linux-signed: 4.15.0-130.134 => 4.15.0-132.136 ====
====     linux-image-4.15.0-132-generic
  * Master version: 4.15.0-132.136
  * Master version: 4.15.0-131.135
==== sosreport: 3.9.1-1ubuntu0.18.04.2 => 3.9.1-1ubuntu0.18.04.3 ====
====     sosreport
  [Hemanth Nakkina]
  * d/p/0005-conntrack-add-conntrack-info.patch: rename the
    conntrackd plugin to conntrack; add conntrack commands.
    (LP: #1898077)
  [Mauricio Oliveira]
  * d/p/0006-conntrack-gather-per-namespace-data.patch: add
    conntrack commands for network namespaces. 
    (LP 1898077)
  [Edward Hope-Morley]
  * d/p/0007-networking-include-ns-ip-neigh-and-ip-rule-info.patch:
    add ip neigh and ip rule commands for network namespaces.
    (LP: #1901555)
==== systemd: 237-3ubuntu10.43 => 237-3ubuntu10.44 ====
====     libnss-systemd:amd64 libpam-systemd:amd64 libsystemd0:amd64 libudev1:amd64 systemd systemd-sysv udev
  * d/extra/dhclient-enter-resolved-hook:
    suppress output of cmp command in dhclient hook (LP: #1878955)
    https://git.launchpad.net/~ubuntu-core-dev/ubuntu/+source/systemd/commit/?id=c5a2db69aafc7a3ab4e71bae44fd7ad9dd955c97
  * d/p/lp1905044/0001-capability-add-a-way-to-get-a-uint64_t-with-all-caps.patch,
    d/p/lp1905044/0002-test-use-cap_last_cap-for-max-supported-cap-number-n.patch:
    test: use cap_last_cap() instead of capability_list_length()
    (LP: #1905044)
    https://git.launchpad.net/~ubuntu-core-dev/ubuntu/+source/systemd/commit/?id=34ebc6e28e63881d40c91c5839597acc2fdab546
  * d/p/lp1905245/0001-basic-cap-list-parse-print-numerical-capabilities.patch:
    print number of unknown capabilities instead of failing
    (LP: #1905245)
    https://git.launchpad.net/~ubuntu-core-dev/ubuntu/+source/systemd/commit/?id=5ab225b7f731c6cf6b4655cb27c3a842150c4c1a
  * d/p/lp1907306/0001-sd-dhcp-client-don-t-log-timeouts-if-already-expired.patch,
    d/p/lp1907306/0002-sd-dhcp-client-track-dhcp4-t1-t2-expire-times.patch,
    d/p/lp1907306/0003-sd-dhcp-client-add-RFC2131-retransmission-details.patch,
    d/p/lp1907306/0004-sd-dhcp-client-simplify-dhcp4-t1-t2-parsing.patch,
    d/p/lp1907306/0005-sd-dhcp-client-correct-dhcpv4-renew-rebind-retransmi.patch,
    d/p/lp1907306/0008-sd-dhcp-client-fix-renew-rebind-timeout-calculation-.patch:
    Send correct number of dhcpv4 renew and rebind requests
    (LP: #1907306)
    https://git.launchpad.net/~ubuntu-core-dev/ubuntu/+source/systemd/commit/?id=036230cac8232bf4f970e565c355ee1a82fc2ee6
  * d/t/root-unittests:
    Remove any corrupt journal files (LP: #1881947)
    https://git.launchpad.net/~ubuntu-core-dev/ubuntu/+source/systemd/commit/?id=b284b93e40b6cb834bb40dd3db94850853ab5bb8
==== tar: 1.29b-2ubuntu0.1 => 1.29b-2ubuntu0.2 ====
====     tar
  * SECURITY UPDATE: Infinite read loop
    - debian/patches/Fix-CVE-2018-20482.patch: Add handling for short read
      condition in sparse_dump_region() of src/sparse.c.
    - CVE-2018-20482
  * SECURITY UPDATE: NULL pointer dereference
    - debian/patches/CVE-2019-9923.patch: Check for NULL return value from
      find_next_block in src/sparse.c.
    - CVE-2019-9923

--
[1] http://cloud-images.ubuntu.com/releases/bionic/release-20210118/
[2] http://cloud-images.ubuntu.com/releases/bionic/release-20210112/