An updated qtbase-opensource-src package has been released for Debian GNU/Linux 8 LTS

Package : qtbase-opensource-src
Version : 5.3.2+dfsg-4+deb8u3
CVE ID : CVE-2018-15518 CVE-2018-19870 CVE-2018-19873

Multiple issues were fixed in Qt.

CVE-2018-15518
A double-free or corruption during parsing of a specially crafted
illegal XML document.

CVE-2018-19870
A malformed GIF image might have caused a NULL pointer dereference in
QGifHandler resulting in a segmentation fault.

CVE-2018-19873
QBmpHandler had a buffer overflow via BMP data.

For Debian 8 "Jessie", these problems have been fixed in version
5.3.2+dfsg-4+deb8u3.

We recommend that you upgrade your qtbase-opensource-src packages.

Further information about Debian LTS security advisories, how to apply
these updates to your system and frequently asked questions can be
found at: https://wiki.debian.org/LTS

  Qtbase-Opensource-Src Security Update for Debian 8 LTS