CVE-2026-111124 CFITSIO through 4.7.0 Heap Out-of-Bounds Read via Negative ZDITHER0 Seed

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 fitsrandvalue table via a zero or negative ZDITHER0 seed. Attackers can supply a crafted FITS file with a SUBTRACTIVEDITHER1 compress...