CVE-2026-21898 json
CryptoLib Has Out-of-bounds Read in Crypto_AOS_ProcessSecurity
published 2026-01-10 9 mo ago modified 2026-06-17 4 mo ago also EUVD-2026-1896
- cvss
- 8.2
- version 3.1, CNA
- cisa kev
- Not listed
- not in CISA's catalog
- epss
- 0.4%
- EPSS 0.4% chance of exploitation in 30 days, percentile 39%
- public exploits
- 0
- none known
Summary
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.
Patch / fix
CISA SSVC
- Exploitation
- Proof of concept is public
- Automatable
- yes
- Technical impact
- partial
- Assessed
- 9 mo ago
Exploit prediction
0.45% chance of exploitation in the next 30 days, higher than 39% of all scored CVEs (FIRST EPSS, 2026-11-08).
Exploits and checks
- github.com https://github.com/nasa/CryptoLib/security/advisories/GHSA-7ch6-2pmg-m853 referenced PoC, tagged "exploit" by a source, unverified
CVSS scores
| assigned by | version | score | vector |
|---|---|---|---|
| CNA | 3.1 | 8.2 | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:H |
Affected products
- nasa CryptoLib
Classification
- Weakness
-
- CWE-125 Out-of-bounds Read
References
-
github.com
/nasa/CryptoLib/security/advisories/GHSA-7ch6-2pmg-m853
exploit, vendor-advisory
-
github.com
/nasa/CryptoLib/releases/tag/v1.4.3
release-notes
Sources
- CVE List CVE-2026-21898
- NVD CVE-2026-21898
Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.
CPEs and fixed versions use Anchore's correction of NVD's data: Added CPE configurations because not yet analyzed by NVD.