# Chef Client 12.21.12 released

**URL:** <https://discourse.chef.io/t/chef-client-12-21-12-released/11518>\
**Category:** Chef Release Announcements\
**Created:** [September 14, 2017, 9:47pm UTC](https://discourse.chef.io/t/chef-client-12-21-12-released/11518 "2017-09-14T21:47:38Z")\
**Posts on this page:** 1\
**Page:** 1

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**Author:** ![thommay](https://avatars.discourse-cdn.com/v4/letter/t/f08c70/32.png) [@thommay](https://discourse.chef.io/u/thommay)\
**Post date:** [September 14, 2017, 9:47pm UTC](https://discourse.chef.io/t/chef-client-12-21-12-released/11518/1 "2017-09-14T21:47:38Z")

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We’ve released Chef Client 12.21.12, fixing ruby and rubygems security issues:

This release of Chef Client contains Ruby 2.3.5, fixing 4 CVEs:

- CVE-2017-0898
- CVE-2017-10784
- CVE-2017-14033
- CVE-2017-14064

It also contains a new version of Rubygems, fixing 4 CVEs:

- CVE-2017-0899
- CVE-2017-0900
- CVE-2017-0901
- CVE-2017-0902

Please note that due to issues beyond our control, this release is only built for Linux on x86, x86\_64 and s390x, FreeBSD, and Windows. We’ll be releasing a new build with support for our other platforms (AIX, Solaris, macOS) as soon as we’re able to.

Regards,  
-Thom