A kernel security update has been released for Fedora 34.

SECURITY: Fedora 34 Update: kernel-5.12.17-300.fc34

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Fedora Update Notification
FEDORA-2021-a95108d156
2021-07-21 01:06:49.497639
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Name : kernel
Product : Fedora 34
Version : 5.12.17
Release : 300.fc34
URL :   https://www.kernel.org/
Summary : The Linux kernel
Description :
The kernel meta package

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Update Information:

The 5.12.17 stable kernel update contains a (unusually large) number of fixes
across the tree.
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ChangeLog:

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References:

[ 1 ] Bug #1974079 - CVE-2021-3612 kernel: joydev: zero size passed to joydev_handle_JSIOCSBTNMAP()
  https://bugzilla.redhat.com/show_bug.cgi?id=1974079
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This update can be installed with the "dnf" update program. Use
su -c 'dnf upgrade --advisory FEDORA-2021-a95108d156' 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