* Builder-next: Fixed a bug in the GCR token cache implementation workaround. [moby/moby#39183](https://github.com/moby/moby/pull/39183)
### Networking
* Fixed an error where `--network-rm` would fail to remove a network. [moby/moby#39174](https://github.com/moby/moby/pull/39174)
### Runtime
* Added performance optimizations in aufs and layer store that helps in massively parallel container creation and removal. [moby/moby#39107](https://github.com/moby/moby/pull/39107), [moby/moby#39135](https://github.com/moby/moby/pull/39135)
* Updated containerd to version 1.2.6. [moby/moby#39016](https://github.com/moby/moby/pull/39016)
* Fixed [CVE-2018-15664](https://nvd.nist.gov/vuln/detail/CVE-2018-15664) symlink-exchange attack with directory traversal. [moby/moby#39357](https://github.com/moby/moby/pull/39357)
* Windows: fixed support for `docker service create --limit-cpu`. [moby/moby#39190](https://github.com/moby/moby/pull/39190)
* daemon: fixed a mirrors validation issue. [moby/moby#38991](https://github.com/moby/moby/pull/38991)
* Docker no longer supports sorting UID and GID ranges in ID maps. [moby/moby#39288](https://github.com/moby/moby/pull/39288)
### Logging
* Added a fix that now allows large log lines for logger plugins. [moby/moby#39038](https://github.com/moby/moby/pull/39038)
### Known Issue
* There are important changes to the upgrade process that, if not correctly followed, can have an impact on the availability of applications running on the Swarm during upgrades. These constraints impact any upgrades coming from any version before 18.09 to version 18.09 or later.
## 18.09.6
2019-05-06
### Builder
* Fixed `COPY` and `ADD` with multiple `<src>` to not invalidate cache if `DOCKER_BUILDKIT=1`.[moby/moby#38964](https://github.com/moby/moby/issues/38964)
### Networking
* Cleaned up the cluster provider when the agent is closed. [docker/libnetwork#2354](https://github.com/docker/libnetwork/pull/2354)
* Windows: Now selects a random host port if the user does not specify a host port. [docker/libnetwork#2369](https://github.com/docker/libnetwork/pull/2369)
### Known Issues
* There are important changes to the upgrade process that, if not correctly followed, can have an impact on the availability of applications running on the Swarm during upgrades. These constraints impact any upgrades coming from any version before 18.09 to version 18.09 or later.
## 18.09.5
2019-04-11
### Builder
* Fixed `DOCKER_BUILDKIT=1 docker build --squash ..` [docker/engine#176](https://github.com/docker/engine/pull/176)
### Client
* Fixed tty initial size error. [docker/cli#1775](https://github.com/docker/cli/pull/1775)
* Fixed dial-stdio goroutine leakage. [docker/cli#1795](https://github.com/docker/cli/pull/1795)
* Fixed the stack informer's selector used to track deployment. [docker/cli#1794](https://github.com/docker/cli/pull/1794)
### Networking
* Fixed `network=host` using wrong `resolv.conf` with `systemd-resolved`. [docker/engine#180](https://github.com/docker/engine/pull/180)
* Fixed Windows ARP entries getting corrupted randomly under load. [docker/engine#192](https://github.com/docker/engine/pull/192)
### Runtime
* Now showing stopped containers with restart policy as `Restarting`. [docker/engine#181](https://github.com/docker/engine/pull/181)
* Now using original process spec for execs. [docker/engine#178](https://github.com/docker/engine/pull/178)
### Swarm Mode
* Fixed leaking task resources when nodes are deleted. [docker/engine#185](https://github.com/docker/engine/pull/185)
### Known Issues
* There are important changes to the upgrade process that, if not correctly followed, can have an impact on the availability of applications running on the Swarm during upgrades. These constraints impact any upgrades coming from any version before 18.09 to version 18.09 or later.
## 18.09.4
2019-03-28
### Builder
* Fixed [CVE-2019-13139](https://nvd.nist.gov/vuln/detail/CVE-2019-13139) by adding validation for `git ref` to avoid misinterpretation as a flag. [moby/moby#38944](https://github.com/moby/moby/pull/38944)