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Cryptolib CVE-2026-22023

HIGH
Out-of-bounds Read (CWE-125)
2026-01-10 security-advisories@github.com
Buffer Overflow Information Disclosure Cryptolib
7.5
CVSS 3.1 · GitHub Advisory
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GitHub Advisory PRIMARY
7.5 HIGH
AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Primary rating from GitHub Advisory · only source for this CVE.

CVSS VectorGitHub Advisory

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Attack Vector
Network
Attack Complexity
Low
Privileges Required
None
User Interaction
None
Scope
Unchanged
Confidentiality
None
Integrity
None
Availability
High

Lifecycle Timeline

4
Analysis Generated
Mar 12, 2026 - 21:54 vuln.today
PoC Detected
Jan 16, 2026 - 16:45 vuln.today
Public exploit code
Patch released
Jan 16, 2026 - 16:45 nvd
Patch available
CVE Published
Jan 10, 2026 - 01:16 nvd
HIGH 7.5

DescriptionGitHub Advisory

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, there is an out-of-bounds heap read vulnerability in cryptography_aead_encrypt(). This issue has been patched in version 1.4.3.

AnalysisAI

CryptoLib versions prior to 1.4.3 contain an out-of-bounds heap read in the cryptography_aead_encrypt() function, affecting spacecraft communications secured via the SDLS-EP protocol. Public exploit code exists for this vulnerability, allowing remote attackers to trigger a denial of service condition without authentication. …

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Attack ChainAIDerived

Hypothetical attack flow derived from CVE metadata

Access
Send crafted SDLS-EP encrypted message
Exploit
Trigger out-of-bounds heap read in cryptography_aead_encrypt()
Impact
Crash cFS process causing denial of service
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Vulnerability AssessmentAI

Exploitation CryptoLib versions prior to 1.4.3 processing SDLS-EP protocol messages from remote spacecraft or ground station. … Additional conditions and limiting factors are described in the full assessment.
Risk Assessment CVSS 7.5 (HIGH). … Full risk analysis with EPSS, KEV, and SSVC signal comparison available after sign-in.
Exploit Scenario An attacker could exploit this vulnerability to compromise the affected system.
Remediation A vendor patch is available — apply it immediately. … Detailed patch versions, workarounds, and compensating controls in full report.
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Recommended ActionAI

Within 7 days: Identify all affected systems and apply vendor patches promptly. …

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CVE-2026-22023 vulnerability details – vuln.today
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