A botan2 security update has been released for Fedora 34.

SECURITY: Fedora 34 Update: botan2-2.17.3-4.fc34

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Fedora Update Notification
FEDORA-2021-8d51cac49f
2021-11-16 15:40:24.255692
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Name : botan2
Product : Fedora 34
Version : 2.17.3
Release : 4.fc34
URL :   https://botan.randombit.net/
Summary : Crypto and TLS for C++11
Description :
Botan is a BSD-licensed crypto library written in C++. It provides a
wide variety of basic cryptographic algorithms, X.509 certificates and
CRLs, PKCS \#10 certificate requests, a filter/pipe message processing
system, and a wide variety of other features, all written in portable
C++. The API reference, tutorial, and examples may help impart the
flavor of the library. This is the current stable release branch 2.x
of Botan.

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Update Information:

Security fix for CVE-2021-40529
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ChangeLog:

* Sun Nov 7 2021 Ben Kircher - 2.17.3-4
- Backport patch for #2002827 (Fix short exponents with ElGamal) from 2.18.2
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References:

[ 1 ] Bug #2002825 - CVE-2021-40529 botan: ElGamal implementation allows plaintext recovery
  https://bugzilla.redhat.com/show_bug.cgi?id=2002825
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This update can be installed with the "dnf" update program. Use
su -c 'dnf upgrade --advisory FEDORA-2021-8d51cac49f' 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