The kdebase packages provide the core applications for KDE, the K Desktop Environment. These core packages include the KDE Display Manager (KDM).
Ludwig Nussel discovered a flaw in KDM. A malicious local KDM user could use a symlink attack to read an arbitrary file that they would not normally have permissions to read. (CVE-2006-2449)
Note: this issue does not affect the version of KDM as shipped with Red Hat Enterprise Linux 2.1 or 3.
All users of KDM should upgrade to these updated packages which contain a backported patch to correct this issue.