Security researcher Scott Bell used the Address Sanitizer tool to discover a use-after-free error during the processing of text when vertical text is enabled. This leads to a potentially exploitable crash. External Reference: http://www.mozilla.org/security/announce/2015/mfsa2015-51.html Acknowledgements: Red Hat would like to thank the Mozilla project for reporting this issue. Upstream acknowledges Scott Bell as the original reporter.
This issue has been addressed in the following products: Red Hat Enterprise Linux 6 Red Hat Enterprise Linux 7 Red Hat Enterprise Linux 5 Via RHSA-2015:0988 https://rhn.redhat.com/errata/RHSA-2015-0988.html
This issue has been addressed in the following products: Red Hat Enterprise Linux 5 Red Hat Enterprise Linux 7 Red Hat Enterprise Linux 6 Via RHSA-2015:1012 https://rhn.redhat.com/errata/RHSA-2015-1012.html