Debian Security Advisory

DLA-2361-1 libx11 -- LTS security update

Date Reported:
01 Sep 2020
Affected Packages:
Security database references:
In the Debian bugtracking system: Bug 969008.
In Mitre's CVE dictionary: CVE-2020-14363.
More information:

Jayden Rivers found an integer overflow in the init_om function of libX11, the X11 client-side library, which could lead to a double free.

For Debian 9 stretch, this problem has been fixed in version 2:1.6.4-3+deb9u3.

We recommend that you upgrade your libx11 packages.

For the detailed security status of libx11 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: