A squashfs-tools security update has been released for Fedora 33.

SECURITY: Fedora 33 Update: squashfs-tools-4.5-3.20210913gite048580.fc33

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Fedora Update Notification
FEDORA-2021-9fb6da134f
2021-09-29 01:07:46.121217
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Name : squashfs-tools
Product : Fedora 33
Version : 4.5
Release : 3.20210913gite048580.fc33
URL :   https://github.com/plougher/squashfs-tools
Summary : Utility for the creation of squashfs filesystems
Description :
Squashfs is a highly compressed read-only filesystem for Linux. This package
contains the utilities for manipulating squashfs filesystems.

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Update Information:

Fix additional write outside destination directory exploit ---- 4.5 release
(includes security fix for CVE-2021-40153)
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ChangeLog:

* Mon Sep 13 2021 Bruno Wolff III - 4.5-3.20210913gite048580
- Fix bug 2003701 (additional write outside destination directory exploit)
* Mon Jul 26 2021 Bruno Wolff III - 4.5-2
- Fix for sparse fragment bug 1985561
* Fri Jul 23 2021 Bruno Wolff III - 4.5-1
- First crack at 4.5 release
- Man pages still need significant work
* Wed Jan 27 2021 Fedora Release Engineering - 4.4-5.git1
- Rebuilt for   https://fedoraproject.org/wiki/Fedora_34_Mass_Rebuild
* Sat Nov 14 2020 Bruno Wolff III - 4.4-4.git1
- Gating tests failed and unable to rerun them
* Wed Nov 11 2020 Bruno Wolff III - 4.4-3.git1
- New upstream release with a minor fix
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References:

[ 1 ] Bug #1998621 - CVE-2021-40153 squashfs-tools: unvalidated filepaths allow writing outside of destination
  https://bugzilla.redhat.com/show_bug.cgi?id=1998621
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This update can be installed with the "dnf" update program. Use
su -c 'dnf upgrade --advisory FEDORA-2021-9fb6da134f' 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