Heroku-18 and Heroku-20 Stack Images Updated

Change effective on 19 January 2022

We have updated the heroku-18 and heroku-20 stack images to pick up security fixes in upstream packages. The new stack images will be rolled out automatically over the next 24 hours. You do not need to redeploy your app or manually restart your dynos.

See this Dev Center article for an overview of the packages available in each stack image.

Changelog of packages

The following packages have been changed; a separate section for each stack (if applicable) lists packages that are only available at build time, but not at runtime.

Stack: heroku-18

  • Updated ghostscript from version 9.26~dfsg+0-0ubuntu0.18.04.14 to 9.26~dfsg+0-0ubuntu0.18.04.15
  • Updated libgs9 from version 9.26~dfsg+0-0ubuntu0.18.04.14 to 9.26~dfsg+0-0ubuntu0.18.04.15
  • Updated libgs9-common from version 9.26~dfsg+0-0ubuntu0.18.04.14 to 9.26~dfsg+0-0ubuntu0.18.04.15
  • Updated libruby2.5 from version 2.5.1-1ubuntu1.10 to 2.5.1-1ubuntu1.11
  • Updated ruby2.5 from version 2.5.1-1ubuntu1.10 to 2.5.1-1ubuntu1.11

Updates to packages available at build time only

  • Updated libgs-dev from version 9.26~dfsg+0-0ubuntu0.18.04.14 to 9.26~dfsg+0-0ubuntu0.18.04.15
  • Updated ruby2.5-dev from version 2.5.1-1ubuntu1.10 to 2.5.1-1ubuntu1.11

Stack: heroku-20

  • Updated ghostscript from version 9.50~dfsg-5ubuntu4.4 to 9.50~dfsg-5ubuntu4.5
  • Updated libgs9 from version 9.50~dfsg-5ubuntu4.4 to 9.50~dfsg-5ubuntu4.5
  • Updated libgs9-common from version 9.50~dfsg-5ubuntu4.4 to 9.50~dfsg-5ubuntu4.5
  • Updated libruby2.7 from version 2.7.0-5ubuntu1.5 to 2.7.0-5ubuntu1.6
  • Updated libsystemd0 from version 245.4-4ubuntu3.14 to 245.4-4ubuntu3.15
  • Updated libudev1 from version 245.4-4ubuntu3.14 to 245.4-4ubuntu3.15
  • Updated linux-libc-dev from version 5.4.0-92.103 to 5.4.0-96.109
  • Updated openssh-client from version 1:8.2p1-4ubuntu0.3 to 1:8.2p1-4ubuntu0.4
  • Updated openssh-server from version 1:8.2p1-4ubuntu0.3 to 1:8.2p1-4ubuntu0.4
  • Updated openssh-sftp-server from version 1:8.2p1-4ubuntu0.3 to 1:8.2p1-4ubuntu0.4
  • Updated ruby2.7 from version 2.7.0-5ubuntu1.5 to 2.7.0-5ubuntu1.6

Updates to packages available at build time only

  • Updated libgs-dev from version 9.50~dfsg-5ubuntu4.4 to 9.50~dfsg-5ubuntu4.5
  • Updated libsystemd-dev from version 245.4-4ubuntu3.14 to 245.4-4ubuntu3.15
  • Updated libudev-dev from version 245.4-4ubuntu3.14 to 245.4-4ubuntu3.15
  • Updated ruby2.7-dev from version 2.7.0-5ubuntu1.5 to 2.7.0-5ubuntu1.6