Not directly a LibreOffice issue--this is just a safe computing suggestion.
Folks probably should update installed version of the ImageMagick image
utilities.
Affecting Linux/OS X/Windows flavors. Has been patched by ImageMagick for
releases > 7.0.1-2 and > 6.9.4-0 so download and upgrade to a current
build. Available from the project site
http://www.imagemagick.org/script/index.php (or check for package support
for your distro).
LibreOffice does not install it, rather makes use of ImageMagick when
present as a helper for a number of image filter/conversion actions.
Stuart
=-ref-=
https://www.cve.mitre.org/cgi-bin/cvename.cgi?name=2016-3714
https://www.imagemagick.org/discourse-server/viewtopic.php?f=4&t=29588)