[ CVE-2026-111124 · Published 15 Oct 2026 ]
Vulnerability in HEASARC cfitsio
CVSS 7.1
EPSS <1%No fix listed yet
[ Description ]Official 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.
[ Fixes ]Fixes and patches
No fix or interim patch is linked from our sources yet. Check the vendor references below and limit exposure of affected systems until a fix is available.
[ References ]References
- github.com/HEASARC/cfitsioProduct
- github.com/HEASARC/cfitsio/blob/d6d27653740864a0483e74cff23c53e34e1dceee/imcompress.cProduct
- github.com/HEASARC/cfitsio/blob/d6d27653740864a0483e74cff23c53e34e1dceee/imcompress.cProduct
- hackmd.io/@haind-pwn/cfitsio-zdither0-dither-seed-oob-readExploitMitigationVendor Advisory
- www.vulncheck.com/advisories/cfitsio-through-4.7.0-heap-out-of-bounds-read-via-negative…Third Party Advisory