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Fedora Update Notification
FEDORA-2026-31a8569c4b
2026-07-18 00:27:50.464532+00:00
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Name : log4cxx
Product : Fedora 43
Version : 1.7.0
Release : 2.fc43
URL : http://logging.apache.org/log4cxx/index.html
Summary : A port to C++ of the Log4j project
Description :
Log4cxx is a popular logging package written in C++. One of its distinctive
features is the notion of inheritance in loggers. Using a logger hierarchy it
is possible to control which log statements are output at arbitrary
granularity. This helps reduce the volume of logged output and minimize the
cost of logging.

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Update Information:

Update to log4cxx 1.7.0.
Fixes CVE-2026-40023: XMLLayout did not escape characters forbidden
by the XML 1.0 specification, which could cause conforming XML
parsers to reject the produced document, silently dropping log
records.
No ABI-relevant changes; liblog4cxx SONAME (%{sover}) is unchanged.
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ChangeLog:

* Fri Jul 3 2026 Till Hofmann <thofmann@fedoraproject.org> - 1.7.0-2
- Skip 2GB-message test on 32-bit architectures
* Fri May 22 2026 Till Hofmann <thofmann@fedoraproject.org> - 1.7.0-1
- Update to 1.7.0
* Fri Jan 16 2026 Fedora Release Engineering <releng@fedoraproject.org> -
1.6.1-2
- Rebuilt for https://fedoraproject.org/wiki/Fedora_44_Mass_Rebuild
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References:

[ 1 ] Bug #2457923 - CVE-2026-40023 log4cxx: Apache Log4cxx: Log processing
impairment due to unsanitized XML characters [fedora-all]
https://bugzilla.redhat.com/show_bug.cgi?id=2457923
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This update can be installed with the "dnf" update program. Use
su -c 'dnf upgrade --advisory FEDORA-2026-31a8569c4b' 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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