CVE-2026-22027 CryptoLib Vulnerable to Heap Buffer Overflow in MariaDB SA Hexstring Conversion
A heap buffer overflow in CryptoLib allows attackers to corrupt memory via malformed database inputs, potentially leading to code execution or crashes.
- Exploited in the wild
- Not known
- Login needed
- An administrator
- Attackable
- Local or same network only
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2026-22027?
CVE-2026-22027 is a medium-severity memory corruption vulnerability in nasa CryptoLib, published on 10 Jan 2026. It can only be exploited from the same machine or local network, with no action from the victim.
Official description
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.
Weakness: CWE-122
Which versions are affected by CVE-2026-22027?
It affects 1 product.
Products include Nasa Cryptolib.
How do I fix CVE-2026-22027?
No fix has been published for CVE-2026-22027 yet. Limit exposure of the affected software until one is available.
Upgrade to the fixed version. Memory-safe languages, compiler hardening and fuzzing prevent most new cases. More about Memory corruption.
Is CVE-2026-22027 being exploited?
It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-22027 exists.
Other vulnerabilities in nasa CryptoLib
- CVE-2025-30216 CryptoLib Has Heap Overflow in Crypto_TM_ProcessSecurity due to Unchecked Secondary Header Length
- CVE-2025-30356 Heap Buffer Overflow via Incomplete Length Check in `Crypto_TC_ApplySecurity`
- CVE-2025-29909 CryptoLib's Crypto_TC_ApplySecurity() Has a Heap Buffer Overflow Vulnerability
- CVE-2025-29911 CryptoLib Has Heap Buffer Overflow in Crypto_AOS_ProcessSecurity Function
- CVE-2025-29912 CryptoLib Has Heap Buffer Overflow Due to Unsigned Integer Underflow in Crypto_TC_ProcessSecurity
Sources
Also known as GHSA-3m35-m689-h29x.