A libvncserver security update has been released for Debian GNU/Linux 8 LTS to address a possible heap overflow issue.

Package : libvncserver
Version : 0.9.9+dfsg2-6.1+deb8u7
CVE ID : CVE-2019-15690
Debian Bug : 954163

In libvncserver, through libvncclient/cursor.c, there is a possibility
of a heap overflow, as reported by Pavel Cheremushkin.

For Debian 8 "Jessie", this problem has been fixed in version
0.9.9+dfsg2-6.1+deb8u7.

We recommend that you upgrade your libvncserver 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