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CVE-2026-21898

CryptoLib Has Out-of-bounds Read in Crypto_AOS_ProcessSecurity

Published: Jan 10, 2026Updated: Jan 15, 2026 Sources: CVE List NVDCWE-125
NVD MITRE
8.2CVSSHIGH
EPSS Score
0.4%
Top 67.1%
CISA KEV
Not in KEV
Exploits
1 Known
Remediation
Patch Available

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 Crypto_AOS_ProcessSecurity function reads memory without valid bounds checking when parsing AOS frame hashes. This issue has been patched in version 1.4.3.

CVSS Vector Breakdown

AV:NAC:LPR:NUI:NS:UC:LI:NA:H
Exploitability
AV:NAttack Vector
Network
AC:LAttack Complexity
Low
PR:NPrivileges Required
None
UI:NUser Interaction
None
Scope
S:UScope
Unchanged
Impact
C:LConfidentiality
Low
I:NIntegrity
None
A:HAvailability
High
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Weaknesses

CWE-125

Affected Products

CryptoLibnasa
cryptolibnasa

Attack Graph

Products CVE Techniques Tactics

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Exploitability

1 exploit source identified

Exploit details including PoC links, Metasploit modules, and scanner templates are available after registration.

View exploit details
Official Patch Available

MITRE ATT&CK

1 technique
Collection
View detailed technique mapping

References

https://github.com/nasa/CryptoLib/security/advisories/GHSA-7ch6-2pmg-m853
github.com
https://github.com/nasa/CryptoLib/releases/tag/v1.4.3
github.com

Timeline

Published
Jan 10, 2026
Last Updated
Jan 15, 2026

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