The dbg_lvl file for the megaraid_sas driver in the Linux kernel before 2.6.27 has world-writable permissions, which allows local users to change the (1) behavior and (2) logging level of the driver by modifying this file.
http://lists.opensuse.org/opensuse-security-announce/2009-12/msg00002.html
http://lists.opensuse.org/opensuse-security-announce/2009-12/msg00005.html
http://lists.opensuse.org/opensuse-security-announce/2010-02/msg00007.html
https://bugzilla.redhat.com/show_bug.cgi?id=526068
http://secunia.com/advisories/37909
https://oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A11018
https://oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A7163
https://rhn.redhat.com/errata/RHSA-2010-0046.html
https://rhn.redhat.com/errata/RHSA-2010-0095.html
http://support.avaya.com/css/P8/documents/100073666
http://www.debian.org/security/2010/dsa-2005
http://www.kernel.org/pub/linux/kernel/v2.6/ChangeLog-2.6.27
http://www.openwall.com/lists/oss-security/2009/11/13/1