A samba security update has been released for Fedora 33.

SECURITY: Fedora 33 Update: samba-4.13.8-0.fc33

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Fedora Update Notification
FEDORA-2021-1d0807008b
2021-05-07 00:47:07.535360
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Name : samba
Product : Fedora 33
Version : 4.13.8
Release : 0.fc33
URL :   https://www.samba.org
Summary : Server and Client software to interoperate with Windows machines
Description :
Samba is the standard Windows interoperability suite of programs for Linux and
Unix.

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Update Information:

Update to Samba 4.13.8 - Security fixes for CVE-2021-20254
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ChangeLog:

* Thu Apr 29 2021 Guenther Deschner - 4.13.8-0
- Update to Samba 4.13.8
- resolves: #1949442, #1955027 - Security fixes for CVE-2021-20254
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References:

[ 1 ] Bug #1949442 - CVE-2021-20254 samba: Negative idmap cache entries can cause incorrect group entries in the Samba file server process token
  https://bugzilla.redhat.com/show_bug.cgi?id=1949442
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This update can be installed with the "dnf" update program. Use
su -c 'dnf upgrade --advisory FEDORA-2021-1d0807008b' 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