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CVE-2026-111125CFITSIO through 4.7.0 Heap Out-of-Bounds Read via HCOMPRESS input_nnybble
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.
6.9 MEDIUMEPSS 0.24%Not in KEVNVD: Analyzed
Overview
Severity
| Score | Severity | Version | Vector String |
|---|---|---|---|
| 6.9 | MEDIUM | 4.0VulnCheck (CNA) | CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:P/VC:L/VI:N/VA:H/SC:N/SI:N/SA:N |
| 7.1 | HIGH | 3.1NVD | CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:N/A:H |
| 6.1 | MEDIUM | 3.1VulnCheck (CNA) | CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:L/I:N/A:H |
Details
- CVE ID
- CVE-2026-111125
- Status
- Analyzed
- Assigner (CNA)
- VulnCheck
- Published
- Oct 15, 2026
- Last modified
- 2026-10-21 02:17 UTC
- Weaknesses
- CWE-125 · Out-of-bounds Read
Affected Products
As published by the CNA in the CVE record.
HEASARCcfitsio1 version range
- through 4.7.0
References
- github.com https://github.com/HEASARC/cfitsio
- github.com https://github.com/HEASARC/cfitsio/blob/d6d27653740864a0483e74cff23c53e34e1dceee/fits_hdecompress.c#L2575-L2633
- github.com https://github.com/HEASARC/cfitsio/blob/d6d27653740864a0483e74cff23c53e34e1dceee/imcompress.c#L6310-L6316
- hackmd.io https://hackmd.io/@haind-pwn/cfitsio-zdither0-dither-seed-oob-read
- vulncheck.com https://www.vulncheck.com/advisories/cfitsio-through-4.7.0-heap-out-of-bounds-read-via-hcompress-input-nnybble