An out-of-bounds write vulnerability was found in netpbm before 10.61. A maliciously crafted file could cause the application to crash or possibly allow code execution.
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.