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."

langen2kvtml in KDE 3.0 to 3.4.2 creates insecure temporary files in /tmp with predictable names, which allows local users to overwrite arbitrary files.

KPPP 2.1.2 in KDE 3.1.5 and earlier, when setuid root without certain wrappers, does not properly close a privileged file descriptor for a domain socket, which allows local users to read and write to /etc/hosts and /etc/resolv.conf and gain control over DNS name resolution by opening a number of file descriptors before executing kppp.

Konqueror in KDE 3.2.3 and earlier allows web sites to set cookies for country-specific top-level domains, such as .ltd.uk, .plc.uk and .firm.in, which could allow remote attackers to perform a session fixation attack and hijack a user's HTTP session.