rendering/render_replaced.cpp in Konqueror in KDE before 4.9.3 allows remote attackers to cause a denial of service (NULL pointer dereference) via a crafted web page, related to "trying to reuse a frame with a null part."
backend/session.c in KDM in KDE 3.3.0 through 3.5.7, when autologin is configured and "shutdown with password" is enabled, allows remote attackers to bypass the password requirement and login to arbitrary accounts via unspecified vectors.