Unrated severityOSV Advisory· Published Jan 10, 2026· Updated Jan 12, 2026
CryptoLib Has Out-of-bounds Read in Crypto_AOS_ProcessSecurity
CVE-2026-21898
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.
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Affected products
2Patches
Vulnerability mechanics
References
2- github.com/nasa/CryptoLib/releases/tag/v1.4.3mitrex_refsource_MISC
- github.com/nasa/CryptoLib/security/advisories/GHSA-7ch6-2pmg-m853mitrex_refsource_CONFIRM
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