Debian Security Advisory

DLA-2312-1 libx11 -- LTS security update

Date Reported:
04 Aug 2020
Affected Packages:
Security database references:
In Mitre's CVE dictionary: CVE-2020-14344.
More information:

Todd Carson discovered some integer overflows in libX11, which could lead to heap corruption when processing crafted messages from an input method.

For Debian 9 stretch, this problem has been fixed in version 2:1.6.4-3+deb9u2.

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: