The actions implementation in the network queueing functionality in the Linux kernel before 2.6.36-rc2 does not properly initialize certain structure members when performing dump operations, which allows local users to obtain potentially sensitive information from kernel memory via vectors related to (1) the tcf_gact_dump function in net/sched/act_gact.c, (2) the tcf_mirred_dump function in net/sched/act_mirred.c, (3) the tcf_nat_dump function in net/sched/act_nat.c, (4) the tcf_simp_dump function in net/sched/act_simple.c, and (5) the tcf_skbedit_dump function in net/sched/act_skbedit.c.
http://lists.opensuse.org/opensuse-security-announce/2010-09/msg00004.html
http://lists.opensuse.org/opensuse-security-announce/2010-09/msg00005.html
http://lists.opensuse.org/opensuse-security-announce/2010-11/msg00000.html
http://lists.opensuse.org/opensuse-security-announce/2010-12/msg00004.html
http://lists.opensuse.org/opensuse-security-announce/2011-02/msg00000.html
https://bugzilla.redhat.com/show_bug.cgi?id=624903
http://secunia.com/advisories/41512
http://secunia.com/advisories/46397
http://support.avaya.com/css/P8/documents/100113326
http://www.kernel.org/pub/linux/kernel/v2.6/testing/ChangeLog-2.6.36-rc2
http://www.openwall.com/lists/oss-security/2010/08/18/1
http://www.openwall.com/lists/oss-security/2010/08/19/4
http://www.redhat.com/support/errata/RHSA-2010-0723.html
http://www.redhat.com/support/errata/RHSA-2010-0771.html
http://www.redhat.com/support/errata/RHSA-2010-0779.html
http://www.ubuntu.com/usn/USN-1000-1
http://www.vmware.com/security/advisories/VMSA-2011-0012.html