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Fedora 44 mingw-expat Significant Use-after-Free and Buffer Overflow Flaws

fedora
Calendar Grey July 6, 2026
Dist Fedora Esm H88
Critical updates for Fedora 44 'mingw-expat' address use-after-free and buffer overflow issues for safer XML parsing.
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 important use-after-free libexpat

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-2026-3cb1034453' 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

Severity
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Name: mingw-expat
Product: Fedora 44
Version: 2.8.2
Release: 1.fc44
URL: http://www.libexpat.org/
Summary: MinGW Windows port of expat XML parser library

Topics%20covered

Topics Covered

security advisory fedora buffer overflow important use-after-free libexpat

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