A kernel security update has been released for Fedora 34.

SECURITY: Fedora 34 Update: kernel-5.12.14-300.fc34

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Fedora Update Notification
FEDORA-2021-fe826f202e
2021-07-08 00:56:09.139873
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Name : kernel
Product : Fedora 34
Version : 5.12.14
Release : 300.fc34
URL :   https://www.kernel.org/
Summary : The Linux kernel
Description :
The kernel meta package

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Update Information:

The 5.12.14 stable kernel update contains a number of important fixes across the
tree.
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ChangeLog:

* Wed Jun 30 2021 Justin M. Forbes [5.12.14-0]
- Add CONFIG_SYSTEM_REVOCATION_LIST backported config option for 5.12.14 (Justin M. Forbes)
- can: bcm: delay release of struct bcm_op after synchronize_rcu (Thadeu Lima de Souza Cascardo)
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References:

[ 1 ] Bug #1965461 - CVE-2021-22543 kernel: Improper handling of VM_IO|VM_PFNMAP vmas in KVM can bypass RO checks
  https://bugzilla.redhat.com/show_bug.cgi?id=1965461
[ 2 ] Bug #1971651 - CVE-2021-3609 kernel: race condition in net/can/bcm.c leads to local privilege escalation
  https://bugzilla.redhat.com/show_bug.cgi?id=1971651
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This update can be installed with the "dnf" update program. Use
su -c 'dnf upgrade --advisory FEDORA-2021-fe826f202e' 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