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CVE-2026-22697

Nasa Cryptolib buffer overflow

7.5 HIGHPublic exploitEPSS 0.54%
  1. Published10 Jan 2026

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, CryptoLib’s KMC crypto service integration is vulnerable to a heap buffer overflow when decoding Base64-encoded ciphertext/cleartext fields returned by the KMC service. The decode destination buffer is sized using an expected output length (len_data_out), but the Base64 decoder writes output based on the actual Base64 input length and does not enforce any destination size limit. An oversized Base64 string in the KMC JSON response can cause out-of-bounds writes on the heap, resulting in process crash and potentially code execution under certain conditions. This issue has been patched in version 1.4.3.

CVSS 3.1 breakdown

Attack vectorNetwork
Attack complexityLow
Privileges requiredNone
User interactionNone
ScopeUnchanged
ConfidentialityNone
IntegrityNone
AvailabilityHigh
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Affected products

Nasa Cryptolib< 1.4.3

Remediation

Fixed in
Nasa Cryptolib≥ 1.4.3

References

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Frequently asked

Is CVE-2026-22697 being actively exploited?

CVE-2026-22697 is not in the CISA KEV catalog. A public exploit reference exists, so treat it as exploitable. Its EPSS exploit probability is 0.54%.

How severe is CVE-2026-22697?

CVE-2026-22697 has a CVSS 3.1 base score of 7.5, rated high. EPSS estimates a 0.54% probability of exploitation.

Which products are affected by CVE-2026-22697?

Affected products include Nasa Cryptolib.

How do I fix CVE-2026-22697?

Upgrade affected software to a fixed version, for example Nasa Cryptolib 1.4.3 or later, then confirm no affected versions remain in your inventory.

How Secuno handles this

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Data from the NVD, CISA KEV catalog and FIRST EPSS. CVSS 3.1 base score shown where available.