Bug 2513993

Summary:	CVE-2026-72522 mingw-expat: libexpat: Denial of Service due to incorrect Unicode surrogate handling [fedora-all]
Product:	[Fedora] Fedora	Reporter:	Srikanth Balasubramanian <sbalasub>
Component:	mingw-expat	Assignee:	Richard W.M. Jones <rjones>
Status:	ON_QA ---	QA Contact:	Fedora Extras Quality Assurance <extras-qa>
Severity:	medium	Docs Contact:
Priority:	medium
Version:	45	CC:	manisandro, rjones
Target Milestone:	---	Keywords:	Security, SecurityTracking
Target Release:	---
Hardware:	Unspecified
OS:	Unspecified
Whiteboard:	{"flaws": ["aa51e840-dd49-443e-9a73-0ba15d2f3871"]}
Fixed In Version:		Doc Type:	---
Doc Text:		Story Points:	---
Clone Of:		Environment:
Last Closed:		Type:	---
Regression:	---	Mount Type:	---
Documentation:	---	CRM:
Verified Versions:		Category:	---
oVirt Team:	---	RHEL 7.3 requirements from Atomic Host:
Cloudforms Team:	---	Target Upstream Version:
Embargoed:
Bug Depends On:
Bug Blocks:	2513021

Description Srikanth Balasubramanian 2026-08-11 14:46:10 UTC

Disclaimer: Community trackers are created by Red Hat Product Security team on a best effort basis. Package maintainers are required to ascertain if the flaw indeed affects their package, before starting the update process.

libexpat before 2.8.3 has an out-of-bounds read and resultant infinite loop because low surrogates are treated the same as high surrogates during Unicode processing in the *_toUtf16 functions.

Comment 1 Aoife Moloney 2026-08-17 15:52:10 UTC

This bug appears to have been reported against 'rawhide' during the Fedora Linux 45 development cycle.
Changing version to 45.

Comment 2 Fedora Update System 2026-08-25 20:59:32 UTC

FEDORA-2026-43f21f29dc (mingw-expat-2.8.3-1.fc43) has been submitted as an update to Fedora 43.
https://bodhi.fedoraproject.org/updates/FEDORA-2026-43f21f29dc

Comment 3 Fedora Update System 2026-08-25 20:59:32 UTC

FEDORA-2026-f5e2a6b9b5 (mingw-expat-2.8.3-1.fc44) has been submitted as an update to Fedora 44.
https://bodhi.fedoraproject.org/updates/FEDORA-2026-f5e2a6b9b5

Comment 4 Fedora Update System 2026-08-25 20:59:33 UTC

FEDORA-2026-6d1e651eb5 (mingw-expat-2.8.3-1.fc45) has been submitted as an update to Fedora 45.
https://bodhi.fedoraproject.org/updates/FEDORA-2026-6d1e651eb5

Comment 5 Fedora Update System 2026-08-26 01:42:14 UTC

FEDORA-2026-43f21f29dc has been pushed to the Fedora 43 testing repository.
Soon you'll be able to install the update with the following command:
`sudo dnf upgrade --enablerepo=updates-testing --refresh --advisory=FEDORA-2026-43f21f29dc`
You can provide feedback for this update here: https://bodhi.fedoraproject.org/updates/FEDORA-2026-43f21f29dc

See also https://fedoraproject.org/wiki/QA:Updates_Testing for more information on how to test updates.

Comment 6 Fedora Update System 2026-08-26 02:02:45 UTC

FEDORA-2026-f5e2a6b9b5 has been pushed to the Fedora 44 testing repository.
Soon you'll be able to install the update with the following command:
`sudo dnf upgrade --enablerepo=updates-testing --refresh --advisory=FEDORA-2026-f5e2a6b9b5`
You can provide feedback for this update here: https://bodhi.fedoraproject.org/updates/FEDORA-2026-f5e2a6b9b5

See also https://fedoraproject.org/wiki/QA:Updates_Testing for more information on how to test updates.

Comment 7 Fedora Update System 2026-08-26 02:20:50 UTC

FEDORA-2026-6d1e651eb5 has been pushed to the Fedora 45 testing repository.
Soon you'll be able to install the update with the following command:
`sudo dnf upgrade --enablerepo=updates-testing --refresh --advisory=FEDORA-2026-6d1e651eb5`
You can provide feedback for this update here: https://bodhi.fedoraproject.org/updates/FEDORA-2026-6d1e651eb5

See also https://fedoraproject.org/wiki/QA:Updates_Testing for more information on how to test updates.