The x25_negotiate_facilities function in net/x25/x25_facilities.c in the Linux kernel before 4.5.5 does not properly initialize a certain data structure, which allows attackers to obtain sensitive information from kernel stack memory via an X.25 Call Request.
https://github.com/torvalds/linux/commit/79e48650320e6fba48369fccf13fd045315b19b8
http://www.ubuntu.com/usn/USN-3021-2
http://www.ubuntu.com/usn/USN-3021-1
http://www.ubuntu.com/usn/USN-3020-1
http://www.ubuntu.com/usn/USN-3019-1
http://www.ubuntu.com/usn/USN-3018-2
http://www.ubuntu.com/usn/USN-3018-1
http://www.ubuntu.com/usn/USN-3017-3
http://www.ubuntu.com/usn/USN-3017-2
http://www.ubuntu.com/usn/USN-3017-1
http://www.ubuntu.com/usn/USN-3016-4
http://www.ubuntu.com/usn/USN-3016-3
http://www.ubuntu.com/usn/USN-3016-2
http://www.ubuntu.com/usn/USN-3016-1
http://www.securityfocus.com/bid/90528
http://www.openwall.com/lists/oss-security/2016/05/10/12
http://www.kernel.org/pub/linux/kernel/v4.x/ChangeLog-4.5.5
http://www.debian.org/security/2016/dsa-3607
http://lists.opensuse.org/opensuse-security-announce/2016-08/msg00007.html
http://lists.opensuse.org/opensuse-security-announce/2016-06/msg00052.html
http://lists.opensuse.org/opensuse-security-announce/2016-06/msg00044.html