A mingw-exiv2 security update has been released for Fedora 34.

SECURITY: Fedora 34 Update: mingw-exiv2-0.27.3-5.fc34

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Fedora Update Notification
FEDORA-2021-2d860da728
2021-05-10 01:04:26.835236
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Name : mingw-exiv2
Product : Fedora 34
Version : 0.27.3
Release : 5.fc34
URL :   http://www.exiv2.org/
Summary : MinGW Windows exiv2 library
Description :
MinGW Windows exiv2 library.

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Update Information:

This update backports security fixes for CVE-2021-29470 and CVE-2021-29473.
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ChangeLog:

* Sat May 1 2021 Sandro Mani - 0.27.3-5
- Backport patch for CVE-2021-29470
- Backport patch for CVE-2021-29473
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References:

[ 1 ] Bug #1953710 - CVE-2021-29470 mingw-exiv2: exiv2: out-of-bounds read in Exiv2::Jp2Image::encodeJp2Header [fedora-all]
  https://bugzilla.redhat.com/show_bug.cgi?id=1953710
[ 2 ] Bug #1954067 - CVE-2021-29473 mingw-exiv2: exiv2: out-of-bounds read in Exiv2::Jp2Image::doWriteMetadata [fedora-all]
  https://bugzilla.redhat.com/show_bug.cgi?id=1954067
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This update can be installed with the "dnf" update program. Use
su -c 'dnf upgrade --advisory FEDORA-2021-2d860da728' 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