encodeText in QDom in Qt before 6.8.0 has a complex algorithm involving XML string copy and inline replacement of parts of a string (with relocation of later data).

When loading a specifically crafted ICNS format image file in QImage then it will trigger a crash.

This issue affects Qt from versions 6.3.0 through 6.5.9, from 6.6.0 through 6.8.4, 6.9.0. This is fixed in 6.5.10, 6.8.5 and 6.9.1.

An issue was discovered in gui/util/qktxhandler.cpp in Qt before 5.15.17 6.x before 6.2.12 6.3.x through 6.5.x before 6.5.5 and 6.6.x before 6.6.2. A buffer overflow and application crash can occur via a crafted KTX image file.