fs/btrfs/inode.c in the Linux kernel before 4.3.3 mishandles compressed inline extents, which allows local users to obtain sensitive pre-truncation information from a file via a clone action.
https://github.com/torvalds/linux/commit/0305cd5f7fca85dae392b9ba85b116896eb7c1c7
https://bugzilla.redhat.com/show_bug.cgi?id=1286261
http://www.ubuntu.com/usn/USN-2890-3
http://www.ubuntu.com/usn/USN-2890-2
http://www.ubuntu.com/usn/USN-2890-1
http://www.ubuntu.com/usn/USN-2889-2
http://www.ubuntu.com/usn/USN-2889-1
http://www.ubuntu.com/usn/USN-2888-1
http://www.ubuntu.com/usn/USN-2887-2
http://www.ubuntu.com/usn/USN-2887-1
http://www.ubuntu.com/usn/USN-2886-1
http://www.securitytracker.com/id/1034895
http://www.securityfocus.com/bid/78219
http://www.oracle.com/technetwork/topics/security/ovmbulletinoct2016-3090547.html
http://www.oracle.com/technetwork/topics/security/linuxbulletinoct2016-3090545.html
http://www.openwall.com/lists/oss-security/2015/11/27/2
http://www.kernel.org/pub/linux/kernel/v4.x/ChangeLog-4.3.3
http://www.debian.org/security/2015/dsa-3426
http://rhn.redhat.com/errata/RHSA-2016-2584.html