Mozilla Thunderbird was updated to 38.5.0 to fix multiple security issues.

The following vulnerabilities were fixed: (boo#959277)

* CVE-2015-7201: Miscellaneous memory safety hazards
* CVE-2015-7210: Use-after-free in WebRTC when datachannel is used after being destroyed
* CVE-2015-7212: Integer overflow allocating extremely large textures
* CVE-2015-7205: Underflow through code inspection
* CVE-2015-7213: Integer overflow in MP4 playback in 64-bit versions
* CVE-2015-7222: Integer underflow and buffer overflow processing MP4 metadata in libstagefright
* CVE-2015-7214: Cross-site reading attack through data and view-source URIs