Description
An uncontrolled recursion vulnerability has been discovered in the Qt QXmlSimpleReader XML parsing functionality of the Qt 5 Core Compatibility APIs module (Qt 6) and the Qt XML module (Qt 5).
Affected products
| Vendor | Product | Affected | Fixed |
|---|---|---|---|
| The Qt Company | Qt | 5.0.0 <6.8.10 | — |
| The Qt Company | Qt | 6.9.0 <6.11.3 | — |
Fixed in Linux distributions
Distributions backport fixes, so the version that fixes this vulnerability differs per release — upgrade to at least the version shown. From the distributions' security trackers and advisories.
Ubuntu
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Ubuntu 24.04 LTS | qtstyleplugins-src | No fix yet | — |
| Ubuntu 22.04 LTS | qtstyleplugins-src | No fix yet | — |
| Ubuntu 20.04 LTS | qtstyleplugins-src | No fix yet | — |
| Ubuntu 18.04 LTS | qtstyleplugins-src | No fix yet | — |
| Ubuntu 16.04 LTS | qtstyleplugins-src | No fix yet | — |
Advisories 1
- WID-SEC-2026-4531 QT: Mehrere Schwachstellen ermöglichen Denial of Service BSI CERT-Bund (WID) · Nov 12, 2026
References
- https://www.qt.io/security-advisories?search=CVE-2026-97845
- https://codereview.qt-project.org/c/qt/qt5compat/+/771290
- https://codereview.qt-project.org/c/qt/qt5compat/+/774512
- https://codereview.qt-project.org/c/qt/qt5compat/+/774513
- https://codereview.qt-project.org/c/qt/qt5compat/+/774632
- https://codereview.qt-project.org/c/qt/qt5compat/+/760219
- https://codereview.qt-project.org/c/qt/qt5compat/+/760220