A kernel security update has been released for Fedora 33.

SECURITY: Fedora 33 Update: kernel-5.11.16-200.fc33

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Fedora Update Notification
FEDORA-2021-e6b4847979
2021-04-27 00:57:16.305487
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Name : kernel
Product : Fedora 33
Version : 5.11.16
Release : 200.fc33
URL :   https://www.kernel.org/
Summary : The Linux kernel
Description :
The kernel meta package

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Update Information:

The 5.11.16 stable kernel update contains a number of important fixes across the
tree.
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ChangeLog:

* Wed Apr 21 2021 Justin M. Forbes [5.11.16-0]
- Turn off ADI_AXI_ADC and AD9467 which now require CONFIG_OF (Justin M. Forbes)
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References:

[ 1 ] Bug #1948772 - CVE-2021-23133 kernel: Race condition in sctp_destroy_sock list_del
  https://bugzilla.redhat.com/show_bug.cgi?id=1948772
[ 2 ] Bug #1951595 - CVE-2021-29155 kernel: protection for sequences of pointer arithmetic operations against speculatively out-of-bounds loads can be bypassed to leak content of kernel memory
  https://bugzilla.redhat.com/show_bug.cgi?id=1951595
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This update can be installed with the "dnf" update program. Use
su -c 'dnf upgrade --advisory FEDORA-2021-e6b4847979' 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