A libtpms security update has been released for Fedora 34.

SECURITY: Fedora 34 Update: libtpms-0.8.4-1.20210624gita594c4692a.fc34.1

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Fedora Update Notification
FEDORA-2021-465b5c3b67
2021-07-01 01:12:48.702995
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Name : libtpms
Product : Fedora 34
Version : 0.8.4
Release : 1.20210624gita594c4692a.fc34.1
URL :   http://github.com/stefanberger/libtpms
Summary : Library providing Trusted Platform Module (TPM) functionality
Description :
A library providing TPM functionality for VMs. Targeted for integration
into Qemu.

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Update Information:

tpm2: Reset too large size indicators in TPM2B to avoid access beyond buffer
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ChangeLog:

* Thu Jun 24 2021 Stefan Berger - 0.8.4-0.20210625gita594c4692a
- tpm2: Reset too large size indicators in TPM2B to avoid access beyond buffer
- tpm2: Restore original value in buffer if unmarshalled one was illegal
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References:

[ 1 ] Bug #1976806 - CVE-2021-3623 libtpms: out-of-bounds access when trying to resume the state of the vTPM
  https://bugzilla.redhat.com/show_bug.cgi?id=1976806
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This update can be installed with the "dnf" update program. Use
su -c 'dnf upgrade --advisory FEDORA-2021-465b5c3b67' 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