Updated qt4 packages fix security vulnerabilities:
A double-free or corruption during parsing of a specially crafted illegal XML document (CVE-2018-15518).
A malformed SVG image could cause a segmentation fault in qsvghandler.cpp (CVE-2018-19869).
A malformed GIF image might have caused a NULL pointer dereference in QGifHandler resulting in a segmentation fault (CVE-2018-19870).
There was an uncontrolled resource consumption in QTgaFile (CVE-2018-19871).
QBmpHandler had a buffer overflow via BMP data (CVE-2018-19873).