A libx11 security update has been released for Debian GNU/Linux 8 Extended LTS to address a protocol command injection vulnerability.

ELA-433-1 libx11 security update

Package libx11
Version 2:1.6.2-3+deb8u5
Related CVEs CVE-2021-31535

Roman Fiedler found that libX11, the X11 protocol client library, was vulnerable to protocol command injection due to insufficient validation of arguments to some functions.

For Debian 8 jessie, these problems have been fixed in version 2:1.6.2-3+deb8u5.

We recommend that you upgrade your libx11 packages.

Further information about Extended LTS security advisories can be found at: https://deb.freexian.com/extended-lts/

  ELA-433-1 libx11 security update