A cflow security update has been released for Fedora 34.

SECURITY: Fedora 34 Update: cflow-1.6-8.fc34

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Fedora Update Notification
FEDORA-2021-6ef76430d0
2021-06-01 01:02:37.833874
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Name : cflow
Product : Fedora 34
Version : 1.6
Release : 8.fc34
URL :   http://www.gnu.org/software/cflow/
Summary : Analyzes C files charting control flow within the program
Description :
GNU cflow analyzes a collection of C source files and prints a graph,
charting control flow within the program.

GNU cflow is able to produce both direct and inverted flowgraphs for C
sources. Optionally a cross-reference listing can be generated. Two
output formats are implemented: POSIX and GNU (extended).

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Update Information:

Fix a use after free problem
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ChangeLog:

* Sat May 22 2021 Terje Rosten - 1.6-8
- Fix use after free issue
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References:

[ 1 ] Bug #1962214 - CVE-2020-23856 cflow: use-after-free in call() in src/parser.c [fedora-all]
  https://bugzilla.redhat.com/show_bug.cgi?id=1962214
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This update can be installed with the "dnf" update program. Use
su -c 'dnf upgrade --advisory FEDORA-2021-6ef76430d0' 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