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Fedora 43 mingw-expat Update Denial of Service CVE-2026

Linuxsecurity •LinuxSecurity Advisories • September 3, 2026

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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

Update to expat-2.8.3.

* Tue Aug 25 2026 Sandro Mani - 2.8.3-1 - Update to 2.8.3 * Thu Jul 16 2026 Fedora Release Engineering - 2.8.2-2 - Rebuilt for

[ 1 ] Bug #2513993 - CVE-2026-72522 mingw-expat: libexpat: Denial of Service due to incorrect Unicode surrogate handling [fedora-all]

This update can be installed with the "dnf" update program. Use su -c 'dnf upgrade --advisory FEDORA-2026-43f21f29dc' at the command line. For more information, refer to the dnf documentation available at

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The full story

This article is one source in a clustered incident — the cluster page carries the summary, timeline and every other outlet covering it.

Fedora 43 and 44 mingw-expat Denial of Service Vulnerability Update Fedora has released updates for mingw-expat to address a Denial of Service vulnerability identified as CVE-2026-72522. This vulnerability arises from improper handling of Unicode surrogate pairs, potentially allowing attackers to disrupt services. The affected versions are expat-2.8.2 and earlier, with the patched version being expat-2.8.3. Users are advised to upgrade to the latest version to mitigate the risk. The vulnerability was published on August 10, 2026, and is applicable to all Fedora systems utilizing mingw-expat. The updates can be installed using the 'dnf' update program. The issue was reported under Bug #2513993, indicating a broad scope of impact across Fedora installations. Current status shows that the vulnerability has been patched, but administrators are urged to apply the updates promptly. 4 sources 46

Extracted Entities

Attack Types (1)

Denial of Service

CVEs (1)

CVE-2026-72522