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CVE-2026-22697— CryptoLib Has Heap Buffer Overflow Vulnerability in KMC Base64 Decode Handling (KMC JSON base64ciphertext/base64cleartext)

Quick assessment

Affected
nasa CryptoLib
Exploitation
Public or AI PoC available; prioritize validation
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

CryptoLib是NASA开源的一个应用程序。用于使用 CCSDS 空间数据链路安全协议提供纯软件解决方案。 CryptoLib 1.4.3之前版本存在安全漏洞，该漏洞源于Base64解码时未强制执行目标大小限制，可能导致堆缓冲区溢出和代码执行。

CVSS 7.5 · High EPSS 0.54% · P44

Possible ATT&CK Techniques 1 AI

T1190 · Exploit Public-Facing Application
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I. Basic Information for CVE-2026-22697

Vulnerability Information
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Vulnerability Title
CryptoLib Has Heap Buffer Overflow Vulnerability in KMC Base64 Decode Handling (KMC JSON base64ciphertext/base64cleartext)
Source: CVE Program / CVE List V5
Vulnerability 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.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Source: CVE Program / CVE List V5
Vulnerability Type
堆缓冲区溢出
Source: CVE Program / CVE List V5
Vulnerability Title
CryptoLib 安全漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
CryptoLib是NASA开源的一个应用程序。用于使用 CCSDS 空间数据链路安全协议提供纯软件解决方案。 CryptoLib 1.4.3之前版本存在安全漏洞，该漏洞源于Base64解码时未强制执行目标大小限制，可能导致堆缓冲区溢出和代码执行。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)

Affected Products

Vendor Product Affected Versions CPE Subscribe
nasa CryptoLib < 1.4.3 -

II. Public POCs for CVE-2026-22697

# POC Description Source Link Shenlong Link
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Qwen3.6-35B-A3B · 15950 chars
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III. Intelligence Information for CVE-2026-22697

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Vendor Advisories for CVE-2026-22697 (1)

Same Patch Batch · nasa · 2026-01-10 · 10 CVEs total

CVE-2026-21898 8.2 HIGH CryptoLib Has Out-of-bounds Read in Crypto_AOS_ProcessSecurity
CVE-2026-21897 7.3 HIGH CryptoLib Has Out-of-Bounds Write in Crypto_Config_Add_Gvcid_Managed_Parameters
CVE-2026-21899 4.7 MEDIUM CryptoLib has an out-of-bounds read and crash vulnerability when decoding an empty Base64u
CVE-2026-21900 CryptoLib Has Out-of-Bounds Read in KMC Encrypt Metadata Parsing via Flawed strtok Pattern
CVE-2026-22025 CryptoLib Memory Leak on HTTP Error Response in KMC Client
CVE-2026-22026 CryptoLib Unbounded Memory Allocation in KMC HTTP Response Handler Allows Resource Exhaust
CVE-2026-22023 CryptoLib Has Out-of-Bounds Read in KMC AEAD Encrypt Metadata Parsing via Flawed strtok Pa
CVE-2026-22024 CryptoLib Memory Leak in KMC Encrypt Function Leads to Resource Exhaustion
CVE-2026-22027 CryptoLib Vulnerable to Heap Buffer Overflow in MariaDB SA Hexstring Conversion

IV. Related Vulnerabilities

Same product: CryptoLib
Same vendor: nasa
Same weakness: CWE-122

V. Comments for CVE-2026-22697

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