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CVE-2026-22026

CryptoLib Unbounded Memory Allocation in KMC HTTP Response Handler Allows Resource Exhaustion

Published: Jan 10, 2026Updated: Jan 16, 2026 Sources: CVE List NVDCWE-789
NVD MITRE
7.5CVSSHIGH
EPSS Score
0.5%
Top 59.0%
CISA KEV
Not in KEV
Exploits
No Known Exploits
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 libcurl write_callback function in the KMC crypto service client allows unbounded memory growth by reallocating response buffers without any size limit or overflow check. A malicious KMC server can return arbitrarily large HTTP responses, forcing the client to allocate excessive memory until the process is terminated by the OS. This issue has been patched in version 1.4.3.

CVSS Vector Breakdown

AV:NAC:LPR:NUI:NS:UC:NI: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:NConfidentiality
None
I:NIntegrity
None
A:HAvailability
High
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Weaknesses

CWE-789

Affected Products

CryptoLibnasa
cryptolibnasa

Exploitability

Official Patch Available

References

https://github.com/nasa/CryptoLib/security/advisories/GHSA-w9cm-q69w-34x7
github.com
https://github.com/nasa/CryptoLib/commit/2372efd3da1ccb226b4297222e25f41ecc84821d
github.com
https://github.com/nasa/CryptoLib/releases/tag/v1.4.3
github.com

Timeline

Published
Jan 10, 2026
Last Updated
Jan 16, 2026

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