Security advisory: Potential Use-After-Free issue in Qt for WebAssembly’s implementation of QNetworkReply

A recently reported potential Use-After-Free issue in Qt’s wasm implementation of QNetworkReply has been assigned the CVE id CVE-2024-30161.

The issue was discovered in Qt versions 6.5.4, 6.5.5, and 6.6.2.

QNetworkReply header data might be accessed via a dangling pointer in Qt for WebAssembly if using the affected versions.

Solution: Apply the following patch or update to Qt 6.5.6 or 6.6.3

Patches:

dev: <https://codereview.qt-project.org/c/qt/qtbase/+/544314&gt;
Qt 6.6: <https://codereview.qt-project.org/c/qt/qtbase/+/548060&gt; or <https://download.qt.io/official_releases/qt/6.6/CVE-2024-30161-qtbase-6.6.diff&gt;
Qt 6.5: <https://codereview.qt-project.org/c/qt/tqtc-qtbase/+/548490&gt; or <https://download.qt.io/official_releases/qt/6.5/CVE-2024-30161-qtbase-6.5.diff&gt;