Heroku-22 and Heroku-24 stacks updated

Change effective on 24 February 2026

We updated the heroku-22 and heroku-24 stacks to pick up security fixes in upstream packages.

The format of the root filesystem on dynos has been updated from ext3 to ext4.

The new base images for each stack roll out automatically to the Common Runtime over the next 48 hours, followed by Private Spaces.

If you use Heroku’s default buildpack-powered build system/stacks, you don’t need to redeploy your app to include these changes. We automatically restart any running dynos as we roll out the new base images for each stack. For Cedar-generation apps, each time a dyno starts, the slug applies on top of the most recent base image. For Fir-generation apps, the built image gets rebased on top of the most recent base image.

If your app uses Heroku’s container stack (most don’t), you must rebuild your app’s Docker image to pick up updates in the base image specified in your Dockerfile.

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

Changelog of packages

Stack: heroku-22

  • Updated cpp-11 from version 11.4.0-1ubuntu1~22.04.2 to 11.4.0-1ubuntu1~22.04.3
  • Updated gcc-11 from version 11.4.0-1ubuntu1~22.04.2 to 11.4.0-1ubuntu1~22.04.3
  • Updated gcc-11-base from version 11.4.0-1ubuntu1~22.04.2 to 11.4.0-1ubuntu1~22.04.3
  • Updated libasan6 from version 11.4.0-1ubuntu1~22.04.2 to 11.4.0-1ubuntu1~22.04.3
  • Updated libgcc-11-dev from version 11.4.0-1ubuntu1~22.04.2 to 11.4.0-1ubuntu1~22.04.3
  • Updated libgnutls-openssl27 from version 3.7.3-4ubuntu1.7 to 3.7.3-4ubuntu1.8
  • Updated libgnutls30 from version 3.7.3-4ubuntu1.7 to 3.7.3-4ubuntu1.8
  • Updated libgnutlsxx28 from version 3.7.3-4ubuntu1.7 to 3.7.3-4ubuntu1.8
  • Updated libtsan0 from version 11.4.0-1ubuntu1~22.04.2 to 11.4.0-1ubuntu1~22.04.3

Updates to packages available at build time only

  • Updated g++-11 from version 11.4.0-1ubuntu1~22.04.2 to 11.4.0-1ubuntu1~22.04.3
  • Updated libgnutls-dane0 from version 3.7.3-4ubuntu1.7 to 3.7.3-4ubuntu1.8
  • Updated libgnutls28-dev from version 3.7.3-4ubuntu1.7 to 3.7.3-4ubuntu1.8
  • Updated libstdc++-11-dev from version 11.4.0-1ubuntu1~22.04.2 to 11.4.0-1ubuntu1~22.04.3

Stack: heroku-24

  • Updated gcc-14-base from version 14.2.0-4ubuntu2~24.04 to 14.2.0-4ubuntu2~24.04.1
  • Updated libatomic1 from version 14.2.0-4ubuntu2~24.04 to 14.2.0-4ubuntu2~24.04.1
  • Updated libgcc-s1 from version 14.2.0-4ubuntu2~24.04 to 14.2.0-4ubuntu2~24.04.1
  • Updated libgnutls-openssl27t64 from version 3.8.3-1.1ubuntu3.4 to 3.8.3-1.1ubuntu3.5
  • Updated libgnutls30t64 from version 3.8.3-1.1ubuntu3.4 to 3.8.3-1.1ubuntu3.5
  • Updated libgomp1 from version 14.2.0-4ubuntu2~24.04 to 14.2.0-4ubuntu2~24.04.1
  • Updated libstdc++6 from version 14.2.0-4ubuntu2~24.04 to 14.2.0-4ubuntu2~24.04.1

Updates to packages available at build time only

  • Updated cpp-13 from version 13.3.0-6ubuntu2~24.04 to 13.3.0-6ubuntu2~24.04.1
  • Updated cpp-13-aarch64-linux-gnu/cpp-13-x86-64-linux-gnu from version 13.3.0-6ubuntu2~24.04 to 13.3.0-6ubuntu2~24.04.1
  • Updated g++-13 from version 13.3.0-6ubuntu2~24.04 to 13.3.0-6ubuntu2~24.04.1
  • Updated g++-13-aarch64-linux-gnu/g++-13-x86-64-linux-gnu from version 13.3.0-6ubuntu2~24.04 to 13.3.0-6ubuntu2~24.04.1
  • Updated gcc-13 from version 13.3.0-6ubuntu2~24.04 to 13.3.0-6ubuntu2~24.04.1
  • Updated gcc-13-aarch64-linux-gnu/gcc-13-x86-64-linux-gnu from version 13.3.0-6ubuntu2~24.04 to 13.3.0-6ubuntu2~24.04.1
  • Updated gcc-13-base from version 13.3.0-6ubuntu2~24.04 to 13.3.0-6ubuntu2~24.04.1
  • Updated libasan8 from version 14.2.0-4ubuntu2~24.04 to 14.2.0-4ubuntu2~24.04.1
  • Updated libcc1-0 from version 14.2.0-4ubuntu2~24.04 to 14.2.0-4ubuntu2~24.04.1
  • Updated libgcc-13-dev from version 13.3.0-6ubuntu2~24.04 to 13.3.0-6ubuntu2~24.04.1
  • Updated libgnutls-dane0t64 from version 3.8.3-1.1ubuntu3.4 to 3.8.3-1.1ubuntu3.5
  • Updated libgnutls28-dev from version 3.8.3-1.1ubuntu3.4 to 3.8.3-1.1ubuntu3.5
  • Updated libhwasan0 from version 14.2.0-4ubuntu2~24.04 to 14.2.0-4ubuntu2~24.04.1
  • Updated libitm1 from version 14.2.0-4ubuntu2~24.04 to 14.2.0-4ubuntu2~24.04.1
  • Updated liblsan0 from version 14.2.0-4ubuntu2~24.04 to 14.2.0-4ubuntu2~24.04.1
  • Updated libquadmath0 from version 14.2.0-4ubuntu2~24.04 to 14.2.0-4ubuntu2~24.04.1
  • Updated libstdc++-13-dev from version 13.3.0-6ubuntu2~24.04 to 13.3.0-6ubuntu2~24.04.1
  • Updated libtsan2 from version 14.2.0-4ubuntu2~24.04 to 14.2.0-4ubuntu2~24.04.1
  • Updated libubsan1 from version 14.2.0-4ubuntu2~24.04 to 14.2.0-4ubuntu2~24.04.1