A mupdf security update has been released for Fedora 34.

SECURITY: Fedora 34 Update: mupdf-1.19.0-2.fc34

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Fedora Update Notification
FEDORA-2021-e1d8a99caa
2021-11-04 01:32:58.741683
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Name : mupdf
Product : Fedora 34
Version : 1.19.0
Release : 2.fc34
URL :   http://mupdf.com/
Summary : A lightweight PDF viewer and toolkit
Description :
MuPDF is a lightweight PDF viewer and toolkit written in portable C.
The renderer in MuPDF is tailored for high quality anti-aliased
graphics. MuPDF renders text with metrics and spacing accurate to
within fractions of a pixel for the highest fidelity in reproducing
the look of a printed page on screen.
MuPDF has a small footprint. A binary that includes the standard
Roman fonts is only one megabyte. A build with full CJK support
(including an Asian font) is approximately seven megabytes.
MuPDF has support for all non-interactive PDF 1.7 features, and the
toolkit provides a simple API for accessing the internal structures of
the PDF document. Example code for navigating interactive links and
bookmarks, encrypting PDF files, extracting fonts, images, and
searchable text, and rendering pages to image files is provided.

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Update Information:

Update to new mupdf upstream release 1.19.0. This enables OCR with the
leptonica/tesseract engine.
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ChangeLog:

* Tue Oct 12 2021 Michael J Gruber 1.19.0-2
- enable OCR (leptonica/tesseract)
* Wed Oct 6 2021 Michael J Gruber 1.19.0-1
- rebase to 1.19.0
* Tue Sep 14 2021 Sahana Prasad - 1.18.0-9
- Rebuilt with OpenSSL 3.0.0
* Thu Jul 22 2021 Fedora Release Engineering - 1.18.0-8
- Rebuilt for   https://fedoraproject.org/wiki/Fedora_35_Mass_Rebuild
* Wed Jul 14 2021 Scott Talbert - 1.18.0-7
- Enable DroidSansFallback font
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References:

[ 1 ] Bug #1985254 - CVE-2021-37220 mupdf: out-of-bounds write because the cached color converter does not properly consider the maximum key size of a hash table [fedora-all]
  https://bugzilla.redhat.com/show_bug.cgi?id=1985254
[ 2 ] Bug #2011302 - mupdf-1.19.0 is available
  https://bugzilla.redhat.com/show_bug.cgi?id=2011302
[ 3 ] Bug #2014860 - python-PyMuPDF-1.19.1 is available
  https://bugzilla.redhat.com/show_bug.cgi?id=2014860
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This update can be installed with the "dnf" update program. Use
su -c 'dnf upgrade --advisory FEDORA-2021-e1d8a99caa' 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
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