Heap-based buffer overflow in the loadbuf function in formisc.c in formail in procmail 3.22 allows remote attackers to cause a denial of service (application crash) or possibly execute arbitrary code via a crafted e-mail message because of a hardcoded realloc size, a different vulnerability than CVE-2014-3618.
https://www.debian.org/security/2017/dsa-4041
https://lists.debian.org/debian-lts-announce/2017/11/msg00019.html
https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=876511