The issue is related to the functions `ReadDCMImage`, `ReadPWPImage`, `ReadCALSImage`, and `ReadPICTImage` in the components `coders/dcm.c`, `coders/pwp.c`, `coders/cals.c`, and `coders/pict.c`, which do not check the return value of the `fputc` function. This allows remote attackers to cause a denial of service via a crafted image file. The exploitation of this issue can lead to a disruption in service.