{"id":"CVE-2026-111124","published":"2026-10-15T19:17:25.627","lastModified":"2026-10-16T18:14:51.460","description":"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.","cvssScore":6.1,"cvssSeverity":"MEDIUM","cvssVector":"CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:L/I:N/A:H","cwes":["CWE-125"],"vendors":[],"products":[],"references":[{"url":"https://github.com/HEASARC/cfitsio","tags":[]},{"url":"https://github.com/HEASARC/cfitsio/blob/d6d27653740864a0483e74cff23c53e34e1dceee/imcompress.c#L5353-L5362","tags":[]},{"url":"https://github.com/HEASARC/cfitsio/blob/d6d27653740864a0483e74cff23c53e34e1dceee/imcompress.c#L7495-L7516","tags":[]},{"url":"https://hackmd.io/@haind-pwn/cfitsio-zdither0-dither-seed-oob-read","tags":[]},{"url":"https://www.vulncheck.com/advisories/cfitsio-through-4.7.0-heap-out-of-bounds-read-via-negative-zdither0-seed","tags":[]}],"exploitRefs":[{"url":"https://github.com/HEASARC/cfitsio","tags":[]},{"url":"https://github.com/HEASARC/cfitsio/blob/d6d27653740864a0483e74cff23c53e34e1dceee/imcompress.c#L5353-L5362","tags":[]},{"url":"https://github.com/HEASARC/cfitsio/blob/d6d27653740864a0483e74cff23c53e34e1dceee/imcompress.c#L7495-L7516","tags":[]}],"hasPoc":true,"ai":null}