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×Two security issues have been discovered in the X.org X server, which
may lead to privilege escalation or an information leak.
For the oldstable distribution (jessie), these problems have been fixed
in version 2:1.16.4-1+deb8u1.
For the stable distribution (stretch), these problems have been fixed in
version 2:1.19.2-1+deb9u1. Setups running root-less X are not affected.
For the testing distribution (buster), these problems have been fixed
in version 2:1.19.3-2.
For the unstable distribution (sid), these problems have been fixed in
version 2:1.19.3-2.
We recommend that you upgrade your xorg-server packages.
Further information about Debian Security Advisories, how to apply
these updates to your system and frequently asked questions can be
found at: https://www.debian.org/security/
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