Security researcher Pantrombka reported a buffer overflow in the libstagefright library during video playback when certain invalid MP4 video files led to the allocation of a buffer that was too small for the content. This led to a potentially exploitable crash. External Reference: https://www.mozilla.org/en-US/security/advisories/mfsa2015-17 Acknowledgements: Red Hat would like to thank the Mozilla project for reporting this issue. Upstream acknowledges Pantrombka as the original reporter. Statement: This issue does not affect the version of firefox and thunderbird as shipped with Red Hat Enterprise Linux 5, 6 and 7.