procps-ng before version 3.3.15 is vulnerable to a local privilege escalation in top. If a user runs top with HOME unset in an attacker-controlled directory, the attacker could achieve privilege escalation by exploiting one of several vulnerabilities in the config_file() function.
lists.opensuse.org/opensuse-security-announce/2019-10/msg00058.html
lists.opensuse.org/opensuse-security-announce/2019-10/msg00059.html
seclists.org/oss-sec/2018/q2/122
www.securityfocus.com/bid/104214
access.redhat.com/errata/RHSA-2019:2189
access.redhat.com/errata/RHSA-2020:0595
bugzilla.redhat.com/show_bug.cgi?id=CVE-2018-1122
lists.debian.org/debian-lts-announce/2018/05/msg00021.html
security.gentoo.org/glsa/201805-14
usn.ubuntu.com/3658-1/
usn.ubuntu.com/3658-3/
www.debian.org/security/2018/dsa-4208
www.exploit-db.com/exploits/44806/
www.qualys.com/2018/05/17/procps-ng-audit-report-advisory.txt