Docker Engine v27.5 Release Notes

--- title: Docker Engine version 27 release notes linkTitle: Engine v27 description: Learn about the new features, bug fixes, and breaking changes for Docker Engine keywords: docker, docker engine, ce, whats new, release notes toc_min: 1 toc_max: 2 tags: - Release notes aliases: - /engine/release-notes/27.1/ - /engine/release-notes/27.0/ --- This page describes the latest changes, additions, known issues, and fixes for Docker Engine version 27. For more information about: - Deprecated and removed features, see [Deprecated Engine Features](../deprecated.md). - Changes to the Engine API, see [Engine API version history](/reference/api/engine/version-history.md). ## 27.5 Release notes for Docker Engine version 27.5 releases. ### 27.5.1 {{< release-date date="2025-01-22" >}} For a full list of pull requests and changes in this release, refer to the relevant GitHub milestones: - [docker/cli, 27.5.1 milestone](https://github.com/docker/cli/issues?q=is%3Aclosed+milestone%3A27.5.1) - [moby/moby, 27.5.1 milestone](https://github.com/moby/moby/issues?q=is%3Aclosed+milestone%3A27.5.1) #### Bug fixes and enhancements - Fix an issue that could persistently prevent daemon startup after failure to initialize the default bridge. [moby/moby#49307](https://github.com/moby/moby/pull/49307) - Add a `DOCKER_IGNORE_BR_NETFILTER_ERROR` environment variable. Setting it to `1` allows running on hosts that cannot load `br_netfilter`. Some things won't work, including disabling inter-container communication in a bridge network. With the userland proxy disabled, it won't be possible to access one container's published ports from another container on the same network. [moby/moby#49306](https://github.com/moby/moby/pull/49306) #### Packaging updates - Update Go runtime to 1.22.11 (fix CVE-2024-45341, CVE-2024-45336). [moby/moby#49312](https://github.com/moby/moby/pull/49312), [docker/docker-ce-packaging#1147](https://github.com/docker/docker-ce-packaging/pull/1147), [docker/cli#5762](https://github.com/docker/cli/pull/5762) - Update RootlessKit to v2.3.2 to support `passt` >= 2024_10_30.ee7d0b6. [moby/moby#49304](https://github.com/moby/moby/pull/49304) - Update Buildx to [v0.20.0](https://github.com/docker/buildx/releases/tag/v0.20.0). [docker/docker-ce-packaging#1149](https://github.com/docker/docker-ce-packaging/pull/1149) ### 27.5.0 {{< release-date date="2025-01-13" >}} For a full list of pull requests and changes in this release, refer to the relevant GitHub milestones: - [docker/cli, 27.5.0 milestone](https://github.com/docker/cli/issues?q=is%3Aclosed+milestone%3A27.5.0) - [moby/moby, 27.5.0 milestone](https://github.com/moby/moby/issues?q=is%3Aclosed+milestone%3A27.5.0) #### Bugfixes and enhancements - containerd image store: Fix passing a build context via tarball to the `/build` endpoint. [moby/moby#49194](https://github.com/moby/moby/pull/49194) - Builder garbage collection policies without a `keepStorage` value now inherit the `defaultKeepStorage` limit as intended. [moby/moby#49137](https://github.com/moby/moby/pull/49137) - Preserve network labels during daemon startup. [moby/moby#49200](https://github.com/moby/moby/pull/49200) - Fix a potential race condition error when deleting a container. [moby/moby#49239](https://github.com/moby/moby/pull/49239) #### Go SDK - `pkg/sysinfo`: deprecate `NumCPU`. This utility has the same behavior as `runtime.NumCPU`. [moby/moby#49247](https://github.com/moby/moby/pull/49247) - `pkg/fileutils`: deprecate `GetTotalUsedFds`: this function is only used internally and will be removed in the next release. [moby/moby#49209](https://github.com/moby/moby/pull/49209) - `pkg/ioutils`: deprecate `BytesPipe`, `NewBytesPipe`, `ErrClosed`, `WriteCounter`, `NewWriteCounter`, `NewReaderErrWrapper`, `NopFlusher`, `NopWriter`, `NopWriteCloser`. They were only used internally and will be removed in the next release. [moby/moby#49246](https://github.com/moby/moby/pull/49246), [moby/moby#49255](https://github.com/moby/moby/pull/49255)

This document provides release notes for Docker Engine version 27.5, including bug fixes, enhancements, and packaging updates in versions 27.5.1 and 27.5.0. Noteworthy updates include fixes for daemon startup issues, Go runtime updates, Buildx updates, and the deprecation of several Go SDK utilities.