Hi, SUSE customer Ericsson reported a kernel crash to us which turned out to be a race condition in the PTY write buffer handling. When two processes/threads write to the same pty, the buffer end could be overwritten and so memory corruption into adjacent buffers could lead to crashes / code execution. Jiri Slaby and Peter Hurley localized and fixed this problem. CVE-2014-0196 has been assigned to this issue. Jiri thinks this was introduced during 2.6.31 development by d945cb9cce20ac7143c2de8d88b187f62db99bdc (pty: Rework the pty layer to use the normal buffering logic) in 2.6.31-rc3. Until then, pty was writing directly to a line discipline without using buffers. https://bugzilla.novell.com/show_bug.cgi?id=875690 Patch is also attached. Ciao, Marcus