Red Hat RHSA-2009:1127-01 Critical Advisory on Kdelibs DoS Vulnerability

The kdelibs packages provide libraries for the K Desktop Environment (KDE).
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)
Users should upgrade to these updated packages, which contain backported patches to correct these issues. The desktop must be restarted (log out, then log back in) for this update to take effect.