procps-ng before version 3.3.15 is vulnerable to a stack buffer overflow in pgrep. This vulnerability is mitigated by FORTIFY, as it involves strncat() to a stack-allocated string. When pgrep is compiled with FORTIFY (as on Red Hat Enterprise Linux and Fedora), the impact is limited to a crash.
https://www.debian.org/security/2018/dsa-4208
https://usn.ubuntu.com/3658-3/
https://usn.ubuntu.com/3658-1/
https://lists.debian.org/debian-lts-announce/2018/05/msg00021.html
https://bugzilla.redhat.com/show_bug.cgi?id=CVE-2018-1125
http://www.securityfocus.com/bid/104214
http://seclists.org/oss-sec/2018/q2/122
http://lists.opensuse.org/opensuse-security-announce/2019-10/msg00059.html
http://lists.opensuse.org/opensuse-security-announce/2019-10/msg00058.html