QtGui: Arbitrary code execution

Background

QtGui is a module for the Qt toolkit.

Description

QtGui’s setMarkdown has a use-after-free related to QTextMarkdownImporter::insertBlock.

Impact

A remote attacker could possibly execute arbitrary code with the privileges of the process, or cause a Denial of Service condition.

Workaround

There is no known workaround at this time.

Resolution

All QtGui users should upgrade to the latest version:

 # emerge --sync
 # emerge --ask --oneshot --verbose ">=dev-qt/qtgui-5.14.2"

Note that the Qt suite is best kept in sync, so a world upgrade may be advisable to keep your system in a good state.