* Fix build failures when `FROM` image is not cached when using legacy schema 1 images [moby/moby#42382](https://github.com/moby/moby/pull/42382).
### Logging
* Update the hcsshim SDK to make daemon logs on Windows less verbose [moby/moby#42292](https://github.com/moby/moby/pull/42292).
### Rootless
* Fix capabilities not being honored when an image was built on a daemon with
user-namespaces enabled [moby/moby#42352](https://github.com/moby/moby/pull/42352).
### Networking
* Update libnetwork to fix publishing ports on environments with kernel boot
parameter `ipv6.disable=1`, and to fix a deadlock causing internal DNS lookups
to fail [moby/moby#42413](https://github.com/moby/moby/pull/42413).
### Contrib
* Update rootlesskit to v0.14.2 to fix a timeout when starting the userland proxy
with the `slirp4netns` port driver [moby/moby#42294](https://github.com/moby/moby/pull/42294).
* Fix "Device or resource busy" errors when running docker-in-docker on a rootless
daemon [moby/moby#42342](https://github.com/moby/moby/pull/42342).
### Packaging
* Update containerd to v1.4.6, runc v1.0.0-rc95 to address [CVE-2021-30465](https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2021-30465)
[moby/moby#42398](https://github.com/moby/moby/pull/42398), [moby/moby#42395](https://github.com/moby/moby/pull/42395),
[docker/containerd-packaging#234](https://github.com/docker/containerd-packaging/pull/234)
* Update containerd to v1.4.5, runc v1.0.0-rc94 [moby/moby#42372](https://github.com/moby/moby/pull/42372),
[moby/moby#42388](https://github.com/moby/moby/pull/42388), [docker/containerd-packaging#232](https://github.com/docker/containerd-packaging/pull/232).
* Update Docker Scan plugin packages (`docker-scan-plugin`) to v0.8 [docker/docker-ce-packaging#545](https://github.com/docker/docker-ce-packaging/pull/545).
## 20.10.6
2021-04-12
### Client
* Apple Silicon (darwin/arm64) support for Docker CLI [docker/cli#3042](https://github.com/docker/cli/pull/3042)
* config: print deprecation warning when falling back to pre-v1.7.0 config file `~/.dockercfg`. Support for this file will be removed in a future release [docker/cli#3000](https://github.com/docker/cli/pull/3000)
### Builder
* Fix classic builder silently ignoring unsupported Dockerfile options and prompt to enable BuildKit instead [moby/moby#42197](https://github.com/moby/moby/pull/42197)
### Logging
* json-file: fix sporadic unexpected EOF errors [moby/moby#42174](https://github.com/moby/moby/pull/42174)
### Networking
* Fix a regression in docker 20.10, causing IPv6 addresses no longer to be bound by default when mapping ports [moby/moby#42205](https://github.com/moby/moby/pull/42205)
* Fix implicit IPv6 port-mappings not included in API response. Before docker 20.10, published ports were accessible through both IPv4 and IPv6 by default, but the API only included information about the IPv4 (0.0.0.0) mapping [moby/moby#42205](https://github.com/moby/moby/pull/42205)
* Fix a regression in docker 20.10, causing the docker-proxy to not be terminated in all cases [moby/moby#42205](https://github.com/moby/moby/pull/42205)
* Fix iptables forwarding rules not being cleaned up upon container removal [moby/moby#42205](https://github.com/moby/moby/pull/42205)
### Packaging
* Update containerd to [v1.4.4](https://github.com/containerd/containerd/releases/tag/v1.4.4) for static binaries. The containerd.io package on apt/yum repos already had this update out of band. Includes a fix for [CVE-2021-21334](https://github.com/containerd/containerd/security/advisories/GHSA-6g2q-w5j3-fwh4). [moby/moby#42124](https://github.com/moby/moby/pull/42124)
* Packages for Debian/Raspbian 11 Bullseye, Ubuntu 21.04 Hirsute Hippo and Fedora 34 [docker/docker-ce-packaging#521](https://github.com/docker/docker-ce-packaging/pull/521) [docker/docker-ce-packaging#522](https://github.com/docker/docker-ce-packaging/pull/522) [docker/docker-ce-packaging#533](https://github.com/docker/docker-ce-packaging/pull/533)