A xorg-server security update has been released for Debian GNU/Linux 8 and 9 Extended LTS to address a use-after-free flaw.
ELA-821-1 xorg-server security update
Package : xorg-server
ELA-821-1 xorg-server security update
Version : 2:1.16.4-1+deb8u11 (jessie), 2:1.19.2-1+deb9u14 (stretch)
Related CVEs :
CVE-2023-1393
Jan-Niklas Sohn discovered that a use-after-free flaw in the Composite
extension of the X.org X server may result in privilege escalation if
the X server is running under the root user.
