CVE-2026-111124

CFITSIO through 4.7.0 contains a heap-based out-of-bounds read vulnerability in the imcompress.c unquantize helpers that allows attackers to read memory before the fits rand value table via a zero or negative ZDITHER0 seed. Attackers can supply a crafted FITS file with a SUBTRACTIVE DITHER 1 compressed image, read through fits open file() and fits read pix(), to cause crashes or leak heap contents in decoded pixels.