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A recent potential divide by zero in Qt SVG has been reported and has been assigned the CVE id CVE-2023-32573.
In QSvgFont, the m_unitsPerEm variable initialization is mishandled so if a SVG file that uses font-face without units-per-em set is passed to QSvgRenderer to render then it can trigger a division by zero.
Solution: Apply the following patch or update to Qt 5.15.14, Qt 6.2.9 or Qt 6.5.1
Qt 6.5: https://codereview.qt-project.org/c/qt/qtsvg/+/474404 or https://download.qt.io/official_releases/qt/6.5/CVE-2023-32573-qtsvg-6.5.diff
Qt 6.2: https://download.qt.io/official_releases/qt/6.2/CVE-2023-32573-qtsvg-6.2.diff
Qt 5.15: https://download.qt.io/official_releases/qt/5.15/CVE-2023-32573-qtsvg-5.15.diff
Download the latest release here: www.qt.io/download.
Qt 6.6. is a feature release with focus on improving UX capabilities including responsive UI technology and the Qt Graph module.
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