VYPR
Unrated severityOSV Advisory· Published Jan 10, 2026· Updated Jan 12, 2026

CryptoLib Has Out-of-Bounds Write in Crypto_Config_Add_Gvcid_Managed_Parameters

CVE-2026-21897

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_Config_Add_Gvcid_Managed_Parameters function only checks whether gvcid_counter > GVCID_MAN_PARAM_SIZE. As a result, it allows up to the 251st entry, which causes a write past the end of the array, overwriting gvcid_counter located immediately after gvcid_managed_parameters_array[250]. This leads to an out-of-bounds write, and the overwritten gvcid_counter may become an arbitrary value, potentially affecting the parameter lookup/registration logic that relies on it. This issue has been patched in version 1.4.3.

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Affected products

2
  • Nasa/CryptolibOSV2 versions
    v1.0.3, v1.1.0, v1.1.1, …+ 1 more
    • (no CPE)range: v1.0.3, v1.1.0, v1.1.1, …
    • (no CPE)range: <1.4.3

Patches

Vulnerability mechanics

References

2

News mentions

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