It was discovered that libICE before 1.0.9-8 used a weak entropy to generate keys. A local attacker could potentially use this flaw for session hijacking using the information available from the process list.
www.openwall.com/lists/oss-security/2019/07/14/3
www.securityfocus.com/bid/96480
www.securitytracker.com/id/1037919
access.redhat.com/errata/RHSA-2017:1865
bugzilla.redhat.com/show_bug.cgi?id=CVE-2017-2626
cgit.freedesktop.org/xorg/lib/libICE/commit/?id=ff5e59f32255913bb1cdf51441b98c9107ae165b
lists.debian.org/debian-lts-announce/2019/11/msg00022.html
security.gentoo.org/glsa/201704-03
www.x41-dsec.de/lab/advisories/x41-2017-001-xorg/