Bug 2553404 - CVE-2026-56403 mingw-expat: libexpat: Arbitrary code execution due to integer overflow in storeAtts [fedora-44]
Summary: CVE-2026-56403 mingw-expat: libexpat: Arbitrary code execution due to integer...
Keywords:
Status: ON_QA
Alias: None
Product: Fedora
Classification: Fedora
Component: mingw-expat
Version: 44
Hardware: Unspecified
OS: Unspecified
medium
medium
Target Milestone: ---
Assignee: Richard W.M. Jones
QA Contact: Fedora Extras Quality Assurance
URL:
Whiteboard: {"flaws": ["a01ca437-c6de-4383-adbb-1...
Depends On:
Blocks: CVE-2026-56403
TreeView+ depends on / blocked
 
Reported: 2026-10-15 12:38 UTC by Avinash Hanwate
Modified: 2026-10-24 18:15 UTC (History)
2 users (show)

Fixed In Version:
Clone Of:
Environment:
Last Closed:
Type: ---
Embargoed:


Attachments (Terms of Use)

Description Avinash Hanwate 2026-10-15 12:38:34 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 2.8.2 has an integer overflow in storeAtts.

Comment 1 Fedora Update System 2026-10-17 09:16:17 UTC
FEDORA-2026-2d09775040 (mingw-expat-2.8.5-1.fc44) has been submitted as an update to Fedora 44.
https://bodhi.fedoraproject.org/updates/FEDORA-2026-2d09775040

Comment 2 Fedora Update System 2026-10-17 09:16:26 UTC
FEDORA-2026-457e7c0fba (mingw-expat-2.8.5-1.fc45) has been submitted as an update to Fedora 45.
https://bodhi.fedoraproject.org/updates/FEDORA-2026-457e7c0fba

Comment 3 Fedora Update System 2026-10-18 01:51:36 UTC
FEDORA-2026-457e7c0fba 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-2026-457e7c0fba`
You can provide feedback for this update here: https://bodhi.fedoraproject.org/updates/FEDORA-2026-457e7c0fba

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

Comment 4 Fedora Update System 2026-10-18 02:46:18 UTC
FEDORA-2026-2d09775040 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-2026-2d09775040`
You can provide feedback for this update here: https://bodhi.fedoraproject.org/updates/FEDORA-2026-2d09775040

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

Comment 5 Fedora Update System 2026-10-24 17:25:32 UTC
FEDORA-2026-86ef30a678 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-2026-86ef30a678`
You can provide feedback for this update here: https://bodhi.fedoraproject.org/updates/FEDORA-2026-86ef30a678

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

Comment 6 Fedora Update System 2026-10-24 18:15:27 UTC
FEDORA-2026-3c5a339682 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-2026-3c5a339682`
You can provide feedback for this update here: https://bodhi.fedoraproject.org/updates/FEDORA-2026-3c5a339682

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


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