Linux kernel 2.4.x and 2.6.x up to 2.6.24-rc3, and possibly other versions, does not change the UID of a core dump file if it exists before a root process creates a core dump in the same location, which might allow local users to obtain sensitive information.

More... (http://nvd.nist.gov/nvd.cfm?cvename=CVE-2007-6206)