Off-by-one buffer overflow in pnmtopng before 2.39, when using the -alpha command line option (Alphas_Of_Color), allows attackers to cause a denial of service (crash) and possibly execute arbitrary code via a crafted PNM file with exactly 256 colors.
Exploit prediction scoring system (EPSS) score
EPSS Score 0.003
EPSS Ranking 50.9%