CVE-2014-0196

The n_tty_write function in drivers/tty/n_tty.c in the Linux kernel through 3.14.3 does not properly manage tty driver access in the "LECHO & !OPOST" case, which allows local users to cause a denial of service (memory corruption and system crash) or gain privileges by triggering a race condition involving read and write operations with long strings.

This issue did not affect the versions of the Linux kernel packages as shipped with Red Hat Enterprise Linux 5.

This issue affected the versions of the Linux kernel packages as shipped with Red Hat Enterprise Linux 6 prior to version kernel-2.6.32-358.6.1.el6, released via RHSA-2013:0744 (https://rhn.redhat.com/errata/RHSA-2013-0744.html). That update added a backport of the upstream commit c56a00a165, which avoided this issue.

This flaw requires local system access to be exploited. We are currently not aware of any working exploit for Red Hat Enterprise Linux 6 or Red Hat Enterprise MRG 2.

The CVSS score(s) listed for this vulnerability do not reflect the associated product's status, and are included for informational purposes to better understand the severity of this vulnerability.