A ruby security update has been released for Fedora 31.

SECURITY: Fedora 31 Update: ruby-2.6.6-125.fc31

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Fedora Update Notification
FEDORA-2020-a95706b117
2020-05-22 03:18:39.167430
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Name : ruby
Product : Fedora 31
Version : 2.6.6
Release : 125.fc31
URL :   http://ruby-lang.org/
Summary : An interpreter of object-oriented scripting language
Description :
Ruby is the interpreted scripting language for quick and easy
object-oriented programming. It has many features to process text
files and to do system management tasks (as in Perl). It is simple,
straight-forward, and extensible.

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Update Information:

Update to Ruby 2.6.6. Also fixes CVE-2020-10933 and CVE-2020-10663.
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ChangeLog:

* Thu May 7 2020 Pavel Valena - 2.6.6-125
- Upgrade to Ruby 2.6.6.
Resolves: rhbz#1833293
Resolves: rhbz#1827505
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References:

[ 1 ] Bug #1827505 - CVE-2020-10663 ruby: rubygem-json: Unsafe Object Creation Vulnerability in JSON [fedora-all]
  https://bugzilla.redhat.com/show_bug.cgi?id=1827505
[ 2 ] Bug #1833293 - CVE-2020-10933 ruby: BasicSocket#read_nonblock method leads to information disclosure [fedora-all]
  https://bugzilla.redhat.com/show_bug.cgi?id=1833293
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This update can be installed with the "dnf" update program. Use
su -c 'dnf upgrade --advisory FEDORA-2020-a95706b117' at the command
line. For more information, refer to the dnf documentation available at
  http://dnf.readthedocs.io/en/latest/command_ref.html#upgrade-command-label

All packages are signed with the Fedora Project GPG key. More details on the
GPG keys used by the Fedora Project can be found at
  https://fedoraproject.org/keys