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 These new images superseded the existing images [2].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: 4.15.0.137.124 => 4.15.0.139.126 
 * linux-signed: 4.15.0-137.141 => 4.15.0-139.143 
 * systemd: 237-3ubuntu10.44 => 237-3ubuntu10.45 


The following is a complete changelog for this image.
new: {'linux-headers-4.15.0-139': '4.15.0-139.143', 'linux-headers-4.15.0-139-generic': '4.15.0-139.143', 'linux-modules-4.15.0-139-generic': '4.15.0-139.143'}
removed: {'linux-headers-4.15.0-137-generic': '4.15.0-137.141', 'linux-headers-4.15.0-137': '4.15.0-137.141', 'linux-modules-4.15.0-137-generic': '4.15.0-137.141'}
changed: ['libnss-systemd:amd64', 'libpam-systemd:amd64', 'libsystemd0:amd64', 'libudev1:amd64', 'linux-headers-generic', 'linux-headers-virtual', 'linux-image-4.15.0-139-generic', 'linux-image-virtual', 'linux-virtual', 'systemd', 'systemd-sysv', 'udev']
new snaps: {}
removed snaps: {}
changed snaps: []
==== linux-meta: 4.15.0.137.124 => 4.15.0.139.126 ====
====     linux-headers-generic linux-headers-virtual linux-image-virtual linux-virtual
  * Bump ABI 4.15.0-139
  * Packaging resync (LP: #1786013)
    - [Packaging] resync debian/dkms-versions from main package
  * Bump ABI 4.15.0-138
  * Packaging resync (LP: #1786013)
    - [Packaging] resync debian/dkms-versions from main package
==== linux-signed: 4.15.0-137.141 => 4.15.0-139.143 ====
====     linux-image-4.15.0-139-generic
  * Master version: 4.15.0-139.143
  * Master version: 4.15.0-138.142
==== systemd: 237-3ubuntu10.44 => 237-3ubuntu10.45 ====
====     libnss-systemd:amd64 libpam-systemd:amd64 libsystemd0:amd64 libudev1:amd64 systemd systemd-sysv 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=257135a59455f4e4063e78cdd3f5cfeca2597b5b
  [ Dimitri John Ledkov ]
  * d/p/lp1878969-meson-initialize-time-epoch-to-reproducible-builds-compat.patch:
    meson: initialize time-epoch to reproducible builds compatible value
    (LP: #1878969)
    https://git.launchpad.net/~ubuntu-core-dev/ubuntu/+source/systemd/commit/?id=6f5a0c94ff4a486ee0b72af926672b24d16ff5a8
  [ Dan Streetman ]
  * d/p/lp1913189-test-accept-that-char-device-0-0-can-now-be-created-.patch:
    - Fix failing test case under 5.8 kernel (LP: #1913189)
    https://git.launchpad.net/~ubuntu-core-dev/ubuntu/+source/systemd/commit/?id=15143ec6cd584a18866390a042348a543e5aa22d
  * d/p/lp1913423-hashmap-make-sure-to-initialize-shared-hash-key-atom.patch:
    Thread-safe init of hashmap shared key (LP: #1913423)
    https://git.launchpad.net/~ubuntu-core-dev/ubuntu/+source/systemd/commit/?id=95c189adb9c3e22576b26b084c7edf001cbc8307
  * d/p/lp1890448-hwdb-Add-EliteBook-to-use-micmute-hotkey.patch:
    Add EliteBook to use micmute hotkey (LP: #1890448)
    https://git.launchpad.net/~ubuntu-core-dev/ubuntu/+source/systemd/commit/?id=19b48bdac5129aa772fbcd2dbf8d1bb5c30c1510
  * d/p/debian/patches/lp1902553-test-disable-QEMU-based-testing-for-TEST-16-EXTEND-T.patch:
    Disable TEST-03 run under qemu (LP: #1902553)
    https://git.launchpad.net/~ubuntu-core-dev/ubuntu/+source/systemd/commit/?id=4e37d20ec379d169cfd53088d0c3b4d7bb65d25b
  * d/p/debian/patches/lp1883447-seccomp-add-all-time64-syscalls.patch:
    Add *time64 syscalls (LP: #1883447)
    https://git.launchpad.net/~ubuntu-core-dev/ubuntu/+source/systemd/commit/?id=a459492c67c5c5855b03daca4b44141705495376
  * d/p/lp1685754-pid1-by-default-make-user-units-inherit-their-umask-.patch:
    Inherit umask for --user processes (LP: #1685754)
    https://git.launchpad.net/~ubuntu-core-dev/ubuntu/+source/systemd/commit/?id=00df8d0e76975594adb765182c587ef495262fe1
  * 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=9684abed02669bfcf696763b887518cf54cd3f69
  * 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=ff2a9ed2ece6bbd86a3d57f42b26cb1a6ca2845a

--
[1] http://cloud-images.ubuntu.com/releases/bionic/release-20210319/
[2] http://cloud-images.ubuntu.com/releases/bionic/release-20210315.1/