The psf_fwrite function in file_io.c in libsndfile allows attackers to cause a denial of service (divide-by-zero error and application crash) via unspecified vectors related to the headindex variable.
https://github.com/erikd/libsndfile/commit/725c7dbb95bfaf8b4bb7b04820e3a00cceea9ce6
http://www.ubuntu.com/usn/USN-2832-1
http://www.openwall.com/lists/oss-security/2015/11/03/9
http://www.openwall.com/lists/oss-security/2014/12/24/3
http://lists.opensuse.org/opensuse-updates/2015-11/msg00145.html
http://lists.opensuse.org/opensuse-updates/2015-11/msg00077.html