The png_push_read_chunk function in pngpread.c in the progressive decoder in libpng 1.6.x through 1.6.9 allows remote attackers to cause a denial of service (infinite loop and CPU consumption) via an IDAT chunk with a length of zero.
Exploit prediction scoring system (EPSS) score
EPSS Score 0.018
EPSS Ranking 82.1%