net/xfrm/xfrm_user.c in the Linux kernel before 3.6 does not initialize certain structures, which allows local users to obtain sensitive information from kernel memory by leveraging the CAP_NET_ADMIN capability. Per https://access.redhat.com/security/cve/CVE-2012-6537
"This issue affects the versions of Linux kernel as shipped with
Red Hat Enterprise Linux 5 and Red Hat Enterprise Linux 6. Future kernel
updates for Red Hat Enterprise Linux 5 and Red Hat Enterprise Linux 6 may
address this issue."
Publication date: Sat, 16 Mar 2013 01:55:00 +0000