qt6-svg vulnerabilities

Denial-of-service vulnerability in the SVG parser and renderer impacts Qt

Uncontrolled recursion in the SVG parser and renderer of the Qt SVG module (QtSvg) in Qt Group Qt allows attackers to cause a denial of service (application crash via stack exhaustion) via a crafted SVG file with deeply nested elements.

Type confusion and heap-buffer-overflow in Qt SVG marker handling causing application crash

A type confusion vulnerability in Qt SVG allows an attacker to cause an application crash via a crafted SVG image. When processing SVG marker references, the renderer retrieves a node by its id attribute and casts it to QSvgMarker* without verifying the node type. A non-marker element (such as a <line> element) that references itself as a marker triggers an out-of-bounds heap read due to the object size difference between QSvgLine and QSvgMarker, followed by an endless recursion that bypasses the marker recursion guard through incorrect virtual dispatch. The result is an application crash (denial of service). This issue affects Qt SV

Use-after-free vulnerability in Qt SVG qsvghandler.cpp allows denial of service via crafted SVG

The module will parse a <pattern> node which is not a child of a structural node. The node will be deleted after creation but might be accessed later leading to a use after free.

Uncontrolled recursion in Qt SVG module

When the module renders a Svg file that contains a <pattern> element, it might end up rendering it recursively leading to stack overflow DoS

CVE-2023-32573

In Qt before 5.15.14, 6.0.x through 6.2.x before 6.2.9, and 6.3.x through 6.5.x before 6.5.1, QtSvg QSvgFont m_unitsPerEm initialization is mishandled.

• Update to 6.4.2-2