For Debian 9 stretch, these problems have been fixed in version
4:4.8.7+dfsg-11+deb9u3.
We recommend that you upgrade your qt4-x11 packages.
For the detailed security status of qt4-x11 please refer to
its security tracker page at:
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
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