The pm_mallocarray2 function in lib/util/mallocvar.c in Netpbm through 10.81.03 allows remote attackers to cause a denial of service (heap-based buffer over-read) via a crafted image file, as demonstrated by pbmmask.
lists.opensuse.org/opensuse-security-announce/2019-04/msg00056.html
github.com/xiaoqx/pocs/blob/master/netpbm
lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/LVMWVVFEADMA7XIPXFHGSBRYKEGGDFGE/
lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/VEZRUJ5LNGULJL7QUAHPV5LBOKIJYP5I/