# Chef 12.22.1 Released!

**URL:** <https://discourse.chef.io/t/chef-12-22-1-released/12675>\
**Category:** Chef Release Announcements\
**Created:** [March 1, 2018, 11:38pm UTC](https://discourse.chef.io/t/chef-12-22-1-released/12675 "2018-03-01T23:38:09Z")\
**Posts on this page:** 1\
**Page:** 1

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**Author:** ![tas50](https://sea2.discourse-cdn.com/flex016/user_avatar/discourse.chef.io/tas50/32/941_2.png) [@tas50](https://discourse.chef.io/u/tas50)\
**Post date:** [March 1, 2018, 11:38pm UTC](https://discourse.chef.io/t/chef-12-22-1-released/12675/1 "2018-03-01T23:38:09Z")

</div>

Ohai Chefs!

We’re happy to announce the release of Chef v12.22.1!

# Release Highlights

## Security Updates

### Ruby

Ruby has been updated to 2.3.6 to resolve CVE-2017-17405

### LibXML2

Libxml2 has been updated to 2.9.7 to resolve CVE-2017-15412

## Ohai 8.26.1

### EC2 detection on C5/M5

Ohai now provides EC2 metadata configuration information on the new C5/M5 instance types running on Amazon’s new hypervisor.

### LsPci Plugin

The new LsPci plugin provides a node[:pci] hash with information about the PCI bus based on lspci. Only runs on Linux.

### Docker Detection

The virtualization plugin has been updated to properly detect when running on Docker CE

# Get the Build

As always, you can download binaries directly from [downloads.chef.io](http://downloads.chef.io) or by using the new mixlib-install command line utility available in ChefDK 0.19.6 or greater.

```auto
$ mixlib-install download chef -v 12.22.1

```

Alternatively, you can install Chef using one of the following command options:

```auto
# In Shell
$ curl https://omnitruck.chef.io/install.sh | sudo bash -s -- -P chef -v 12.22.1

# In Windows Powershell
. { iwr -useb https://omnitruck.chef.io/install.ps1 } | iex; install -project chef -version 12.22.1

```