Integer signedness error in the osf_sysinfo function in arch/alpha/kernel/osf_sys.c in the Linux kernel before 2.6.39.4 on the Alpha platform allows local users to obtain sensitive information from kernel memory via a crafted call.
https://github.com/torvalds/linux/commit/21c5977a836e399fc710ff2c5367845ed5c2527f
https://euvd.enisa.europa.eu/vulnerability/EUVD-2011-2198
http://www.openwall.com/lists/oss-security/2011/06/15/7
http://ftp.osuosl.org/pub/linux/kernel/v2.6/ChangeLog-2.6.39.4