CVE-2026-22027 MEDIUM

CVE-2026-22027: CryptoLib Vulnerable to Heap Buffer Overflow in MariaDB SA Hexstring Conversion

Vendor Nasa
Product CryptoLib
Weakness CWE-122
Published January 10, 2026
Last update January 12, 2026

CVSS base score

5.7/10
Attack vector Local
Attack complexity Low
Privileges required High
User interaction None
Confidentiality
Integrity

CVSS vector

CVSS:4.0/AV:L/AC:L/AT:P/PR:H/UI:N/VC:N/VI:H/VA:H/SC:N/SI:N/SA:N

What the vulnerability does

01Description

CryptoLib provides a software-only solution using the CCSDS Space Data Link Security Protocol - Extended Procedures (SDLS-EP) to secure communications between a spacecraft running the core Flight System (cFS) and a ground station. Prior to version 1.4.3, the convert_hexstring_to_byte_array() function in the MariaDB SA interface writes decoded bytes into a caller-provided buffer without any capacity check. When importing SA fields from the database (e.g., IV, ARSN, ABM), a malformed or oversized hex string in the database can overflow the destination buffer, corrupting adjacent heap memory. This issue has been patched in version 1.4.3.

Key dates

02Disclosure timeline

January 10, 2026 CVE published
January 12, 2026 Record updated