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Fedora 43 mingw-expat Critical Use After Free and Buffer Overflow Issue

fedora
Calendar Grey July 6, 2026
Dist Fedora Esm H88
Expat 2.8.2 for Fedora 43 includes critical fixes for use-after-free and buffer overflow vulnerabilities.
Update to expat-2.8.2.

Summary

This is expat, the C library for parsing XML, written by James Clark. Expat

is a stream oriented XML parser. This means that you register handlers with

the parser prior to starting the parse. These handlers are called when the

parser discovers the associated structures in the document being parsed. A

start tag is an example of the kind of structures for which you may

register handlers.

Update Information:

Update to expat-2.8.2.

Topics%20covered

Topics Covered

security advisory fedora buffer overflow critical use-after-free mingw-expat

Change Log

* Fri Jun 26 2026 Sandro Mani - 2.8.2-1 - Update to 2.8.2

References


[ 1 ] Bug #2486180 - CVE-2026-50219 mingw-expat: libexpat: Use-after-free vulnerability due to improper handler call depth tracking [fedora-all] https://bugzilla.redhat.com/show_bug.cgi?id=2486180 [ 2 ] Bug #2493317 - CVE-2026-56412 mingw-expat: libexpat: Use-after-free vulnerability due to improper handling of XML CDATA sections [fedora-43] https://bugzilla.redhat.com/show_bug.cgi?id=2493317 [ 3 ] Bug #2493319 - CVE-2026-56412 mingw-expat: libexpat: Use-after-free vulnerability due to improper handling of XML CDATA sections [fedora-44] https://bugzilla.redhat.com/show_bug.cgi?id=2493319 [ 4 ] Bug #2493638 - CVE-2026-56132 mingw-expat: libexpat: Arbitrary Code Execution via Heap-based Buffer Overflow [fedora-all] https://bugzilla.redhat.com/show_bug.cgi?id=2493638

Update Instructions

This update can be installed with the "dnf" update program. Use su -c 'dnf upgrade --advisory FEDORA-2026-6666907a26' 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

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Name: mingw-expat
Product: Fedora 43
Version: 2.8.2
Release: 1.fc43
URL: http://www.libexpat.org/
Summary: MinGW Windows port of expat XML parser library

Topics%20covered

Topics Covered

security advisory fedora buffer overflow critical use-after-free mingw-expat

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