Heap-Based Out-of-Bounds Read Vulnerability in CFITSIO
CVE-2026-111125
6.9MEDIUM
Key Information:
Badges
👾 Exploit Exists🟡 Public PoC
What is CVE-2026-111125?
CFITSIO versions through 4.7.0 contain a vulnerability that allows for a heap-based out-of-bounds read via the HCOMPRESS tile decoder. By crafting a specially designed FITS file that declares oversized tile geometry, an attacker may exploit this flaw through the input_nnybble function in fits_hdecompress.c. Successful exploitation can lead to application crashes or the disclosure of sensitive heap memory.
Affected Version(s)
cfitsio 0 <= 4.7.0
Exploit Proof of Concept (PoC)
PoC code is written by security researchers to demonstrate the vulnerability can be exploited. PoC code is also a key component for weaponization which could lead to ransomware.
References
CVSS V4
Score:
6.9
Severity:
MEDIUM
Confidentiality:
Low
Integrity:
None
Availability:
High
Attack Vector:
Local
Attack Complexity:
Low
Attack Required:
None
Privileges Required:
Undefined
User Interaction:
Unknown
Timeline
- 🟡
Public PoC available
- 👾
Exploit known to exist
Vulnerability published
Vulnerability Reserved
Credit
HaiND from the Post and Telecommunication Institute of Technology