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."
The KDE screen saver in KDE before 3.0.5 does not properly check the return value from a certain function call, which allows attackers with physical access to cause a crash and access the desktop session.
KDM in KDE 3.1.3 and earlier does not verify whether the pam_setcred function call succeeds, which may allow attackers to gain root privileges by triggering error conditions within PAM modules, as demonstrated in certain configurations of the MIT pam_krb5 module.
KDM in KDE 3.1.3 and earlier uses a weak session cookie generation algorithm that does not provide 128 bits of entropy, which allows attackers to guess session cookies via brute force methods and gain access to the user session.
Buffer overflow in DSC 3.0 parser from GSview, as used in KGhostView in KDE 1.1 and KDE 3.0.3a, may allow attackers to cause a denial of service or execute arbitrary code via a modified .ps (PostScript) input file.
The KDE kscd program does not drop privileges when executing a program specified in a user's SHELL environmental variable, which allows the user to gain privileges by specifying an alternate program to execute.