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TI-2026-74908 Aliases CVE-2026-111124

Heap out-of-bounds read in CFITSIO via negative ZDITHER0 seed

Priority MEDIUM 64CWE-125Published · Updated

Key facts

Attack vector
Local
Privileges required
None
User interaction
Passive
Attack complexity
Low
Attack requirements
None
Impact type
—
Confidentiality · integrity · availability
Low · None · High
Fix status
Deferred Red Hat: fix deferred

Attack profile from CVSS 4.0 · CNA. Fix status from CNA and Red Hat.

Summary

CFITSIO from 0 through 4.7.0 has a heap-based out-of-bounds read in the imcompress.c unquantize helpers (CWE-125). A zero or negative ZDITHER0 seed makes it read memory before the fits_rand_value table. A local attacker with no privileges needs a user to open a crafted FITS file with a SUBTRACTIVE_DITHER_1 compressed image, which can crash the application or leak heap contents in decoded pixels. A public exploit is linked in the references.

Written with Claude Haiku 5.5 from the sources below · 2026-10-28

Description from the CNA

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.

Why it matters now

Exploitation Proof of concept CISA SSVC · not in CISA KEV
EPSS 0.00238 14th percentileScored 2026-11-07
Public exploit Yes 1 exploit referenceTagged by NVD
Fix Deferred Red Hat: fix deferred

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation
Poc
Automatable
No
Technical impact
Partial

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

VendorProductAffected versionsFixed inStatusSource
HEASARCcfitsioup to 4.7.0—No fix listedCNA
  • cfitsio VendorHEASARC Affected up to 4.7.0 Fixed in — No fix listed CNA

CPE configurations NVD · 1

CPEVersionsRoleVendor
cpe:2.3:a:nasa:cfitsio:*:*:*:*:*:*:*:*up to 4.7.0Vulnerablenasa
  • cpe:2.3:a:nasa:cfitsio:*:*:*:*:*:*:*:* Versions up to 4.7.0 Vulnerable ·nasa

Remediation

The sources list no fixed version for cfitsio. Red Hat lists Red Hat Enterprise Linux 10 and Red Hat Enterprise Linux AI (RHEL AI) 3 as affected with the plan none available.

Written with Claude Haiku 5.5 from the sources below · 2026-10-28

Vendor assessments

Red Hat

Red Hat rating: Moderate. Red Hat's page for this CVE →

ProductStatusPlan or fix
Red Hat Enterprise Linux 10AffectedNo fix yet: Fix deferred
Red Hat Enterprise Linux AI (RHEL AI) 3AffectedNo fix yet: Fix deferred

Timeline

  1. 2026-10-16 Threatist record created from CVE-2026-111124
  2. 2026-10-16 Priority changed: MEDIUM → LOW
  3. 2026-10-16 Affected versions changed · Red Hat
  4. 2026-10-16 CVSS score added · Red Hat
  5. 2026-10-20 CVSS score added · NVD
  6. 2026-10-26 CISA SSVC decision points changed
  7. 2026-10-26 Priority changed: LOW → MEDIUM

References

Exploit 1

Other 3

  • TI-2026-79486 Out-of-bounds write in CFITSIO ffgcls2 allows code execution CVSS 4.0HIGH 8.5

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences