arch/powerpc/mm/fsl_booke_mmu.c in KGDB in the Linux kernel 2.6.30 and other versions before 2.6.33, when running on PowerPC, does not properly perform a security check for access to a kernel page, which allows local users to overwrite arbitrary kernel memory, related to Fsl booke.
http://lists.opensuse.org/opensuse-security-announce/2010-07/msg00006.html
http://secunia.com/advisories/39830
http://secunia.com/advisories/40645
https://exchange.xforce.ibmcloud.com/vulnerabilities/58840
http://www.debian.org/security/2010/dsa-2053
http://www.openwall.com/lists/oss-security/2010/04/29/3
http://www.openwall.com/lists/oss-security/2010/04/29/9