kdelibs has multiple vulnerabilities.
From the Red Hat alert:
A flaw was found in the way the KDE CSS parser handled content for the
CSS "style" attribute. A remote attacker could create a specially-crafted
CSS equipped HTML page, which once visited by an unsuspecting user, could
cause a denial of service (Konqueror crash) or, potentially, execute
arbitrary code with the privileges of the user running Konqueror.
(CVE-2009-1698)
A flaw was found in the way the KDE HTML parser handled content for the
HTML "head" element. A remote attacker could create a specially-crafted
HTML page, which once visited by an unsuspecting user, could cause a denial
of service (Konqueror crash) or, potentially, execute arbitrary code with
the privileges of the user running Konqueror. (CVE-2009-1690)
An integer overflow flaw, leading to a heap-based buffer overflow, was
found in the way the KDE JavaScript garbage collector handled memory
allocation requests. A remote attacker could create a specially-crafted
HTML page, which once visited by an unsuspecting user, could cause a denial
of service (Konqueror crash) or, potentially, execute arbitrary code with
the privileges of the user running Konqueror. (CVE-2009-1687)
