CVE-2026-111124
Nasa Cfitsio: out-of-bounds read can lead to denial of service
- Risk score
- 49/100
- CVSS
- 7.1 v3.1
- Exploit chance (30 days)
- 0.2%
- Published
- 15 Oct 2026
Open in the live forecast Today's forecast
What to know
- What it is
- 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 thr…
- Affected
- Nasa Cfitsio
- Fix
- Apply the vendor's security update; see the linked advisory.
- Exploitation
- Public proof of concept
Story map
At a glance
Nasa Cfitsio: Yellow, plan it in. 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…
The flaws
- CVE-2026-111124: Out-of-bounds read can lead to denial of service (CVSS 7.1 · EPSS 0%)
- CVE-2026-111125: Out-of-bounds read can lead to denial of service (CVSS 7.1 · EPSS 0%)
The fix
Fix: Apply the vendor's security update; see the linked advisory.
Who is exposed: Nasa Cfitsio
Where it stands
- Public proof of concept
Connects to
- Same weakness: Out-of-bounds read (CWE-125). 347 other warnings in 30 days
Why it is Yellow
- CVSS 7.1 high
- Public exploit or proof of concept referenced
References
- https://github.com/HEASARC/cfitsio
- https://github.com/HEASARC/cfitsio/blob/d6d27653740864a0483e74cff23c53e34e1dceee/imcompress.c#L5353-L5362
- https://github.com/HEASARC/cfitsio/blob/d6d27653740864a0483e74cff23c53e34e1dceee/imcompress.c#L7495-L7516
- https://hackmd.io/@haind-pwn/cfitsio-zdither0-dither-seed-oob-read
- https://www.vulncheck.com/advisories/cfitsio-through-4.7.0-heap-out-of-bounds-read-via-negative-zdither0-seed
Original 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.
Last activity 15 Oct 2026. Patch Forecast updates every hour.