The task_show_regs function in arch/s390/kernel/traps.c in the Linux kernel before 2.6.38-rc4-next-20110216 on the s390 platform allows local users to obtain the values of the registers of an arbitrary process by reading a status file under /proc/.
https://exchange.xforce.ibmcloud.com/vulnerabilities/65464
https://bugzilla.redhat.com/show_bug.cgi?id=677850
http://www.vmware.com/security/advisories/VMSA-2011-0012.html
http://www.securityfocus.com/bid/46421
http://www.securityfocus.com/archive/1/520102/100/0/threaded
http://secunia.com/advisories/46397
http://openwall.com/lists/oss-security/2011/02/16/9