Mandriva Linux Security Advisory - An extremely long list of vulnerabilities in the Linux 2.6 kernel have been addressed. These range from various arbitrary code execution to denial of service vulnerabilities.
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Ubuntu Security Notice 574-1 - A massive slew of vulnerabilities relating to the linux-source-2.6.17/20/22 packages have been addressed.
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Debian Security Advisory 1436-1 - Several local vulnerabilities have been discovered in the Linux kernel that may lead to a denial of service or the execution of arbitrary code.
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