There have been recent local-user Linux kernel exploits (CVE-2010-3081, CVE-2010-3301) made available that affect most 64bit Linux systems, regardless of distribution. These exploits allow untrusted users to gain root-level administrative privileges into the system. This attack is relatively easily executed, which poses a substantial risk to almost all systems.
http://www.pornxspace.com/webmasters/
So make sure you update your kernels asap if you have 64bit linux!
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