A libx11 security update has been released for Debian GNU/Linux 8 and 9 Extended LTS to address missing input validation.
ELA-881-1 libx11 security update
Package : libx11
Version : 2:1.6.2-3+deb8u6 (jessie), 2:1.6.4-3+deb9u5 (stretch)
Related CVEs :
CVE-2023-3138
Missing input validation in various functions may have resulted in
denial of service in various functions provided by libx11, the X11
client-side library.
