The kdelibs package provides libraries for the K Desktop Environment (KDE). Qt is a GUI software toolkit for the X Window System.
An integer overflow flaw was found in the way Qt handled pixmap images. The KDE khtml library uses Qt in such a way that untrusted parameters could be passed to Qt, triggering the overflow. An attacker could for example create a malicious web page that when viewed by a victim in the Konqueror browser would cause Konqueror to crash or possibly execute arbitrary code with the privileges of the victim. (CVE-2006-4811)
Users of KDE should upgrade to these updated packages, which contain a backported patch to correct this issue.