CVE-2026-111125
MediumCVSS 6.1Exploitation Probability (EPSS)
Low risk2th percentile - higher than 2% of all known CVEs
Summary
CFITSIO through 4.7.0 contains a heap-based out-of-bounds read vulnerability in the HCOMPRESS tile decoder that allows attackers to read past the compressed tile buffer via input_nnybble in fits_hdecompress.c. Attackers can supply a crafted FITS file with ZCMPTYPE HCOMPRESS_1 declaring oversized tile geometry to crash applications calling fits_read_pix or disclose limited heap memory.
Risk Assessment
Processing a malicious FITS file can crash the application or disclose heap memory contents. This affects systems analyzing astronomical data from untrusted sources.
Recommendation
Update CFITSIO to a version newer than 4.7.0 once a fix is released and avoid processing untrusted FITS files.
Other vulnerabilities in CFITSIO
Original NVD description (English source)
CFITSIO through 4.7.0 contains a heap-based out-of-bounds read vulnerability in the HCOMPRESS tile decoder that allows attackers to read past the compressed tile buffer via input_nnybble in fits_hdecompress.c. Attackers can supply a crafted FITS file with ZCMPTYPE HCOMPRESS_1 declaring oversized tile geometry to crash applications calling fits_read_pix or disclose limited heap memory.
Vulnerability data from NVD (NIST) · CISA KEV · EPSS