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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 2.8.4 lacks handler call depth tracking with custom encoding callbacks. Thus, a use-after-free can occur. NOTE: this is similar to CVE-2026-50219, CVE-2026-56131 and CVE-2026-56412.
FEDORA-2026-9e9244744d (mingw-expat-2.8.4-1.fc45) has been submitted as an update to Fedora 45. https://bodhi.fedoraproject.org/updates/FEDORA-2026-9e9244744d
FEDORA-2026-4a2ee61320 (mingw-expat-2.8.4-1.fc43) has been submitted as an update to Fedora 43. https://bodhi.fedoraproject.org/updates/FEDORA-2026-4a2ee61320
FEDORA-2026-5660612c34 (mingw-expat-2.8.4-1.fc44) has been submitted as an update to Fedora 44. https://bodhi.fedoraproject.org/updates/FEDORA-2026-5660612c34
FEDORA-2026-9e9244744d 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-2026-9e9244744d` You can provide feedback for this update here: https://bodhi.fedoraproject.org/updates/FEDORA-2026-9e9244744d See also https://fedoraproject.org/wiki/QA:Updates_Testing for more information on how to test updates.
FEDORA-2026-5660612c34 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-2026-5660612c34` You can provide feedback for this update here: https://bodhi.fedoraproject.org/updates/FEDORA-2026-5660612c34 See also https://fedoraproject.org/wiki/QA:Updates_Testing for more information on how to test updates.
FEDORA-2026-4a2ee61320 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-2026-4a2ee61320` You can provide feedback for this update here: https://bodhi.fedoraproject.org/updates/FEDORA-2026-4a2ee61320 See also https://fedoraproject.org/wiki/QA:Updates_Testing for more information on how to test updates.
FEDORA-2026-9e9244744d (mingw-expat-2.8.4-1.fc45) has been pushed to the Fedora 45 stable repository. If problem still persists, please make note of it in this bug report.
FEDORA-2026-5660612c34 (mingw-expat-2.8.4-1.fc44) has been pushed to the Fedora 44 stable repository. If problem still persists, please make note of it in this bug report.
FEDORA-2026-4a2ee61320 (mingw-expat-2.8.4-1.fc43) has been pushed to the Fedora 43 stable repository. If problem still persists, please make note of it in this bug report.