CVE-2026-22025: Medium Vulnerability in NASA CryptoLib

A medium-severity vulnerability has been identified in NASA's CryptoLib, a software solution designed to secure communications between spacecraft and ground stations using the CCSDS Space Data Link Security Protocol. This vulnerability allows attackers to exploit memory leaks resulting from improper handling of HTTP error responses. Specifically, prior to version 1.4.3, the cryptography_encrypt() and cryptography_decrypt() functions do not free previously allocated buffers when the KMC server returns a non-200 HTTP status code. Each failed request leaks approximately 467 bytes, and repeated failures can gradually exhaust system memory.

The CVSS score for this vulnerability is 6.3, indicating a medium severity. This situation necessitates immediate attention from organizations utilizing the affected version of CryptoLib, as the risk to organizations includes potential memory exhaustion leading to denial of service conditions. The urgency for defenders is clear; they should prioritize patching to version 1.4.3 or later to ensure system stability and security.

Currently, there are no known exploits publicly available for this vulnerability, and it has not been included in the known exploitation vulnerabilities (KEV) catalog. However, organizations should remain vigilant and monitor their systems for any unusual memory usage patterns that could indicate exploitation attempts.

Organizations should address this vulnerability in their priority patch cycle, ensuring that all systems utilizing CryptoLib are updated to the latest version. Implementing this patch will significantly reduce the risk of memory leaks and the associated denial of service risks.

In summary, CVE-2026-22025 presents a genuine risk due to its potential impact on system availability. Organizations are encouraged to take prompt action to mitigate this vulnerability and safeguard their systems.

The vulnerability was patched in version 1.4.3, which was released on January 10, 2026. It is critical that users of the affected versions upgrade immediately.

Vulnerability Details

CVE-2026-22025 is characterized by a memory leak vulnerability in NASA's CryptoLib, which uses the CCSDS Space Data Link Security Protocol to secure communications. The vulnerability was discovered prior to version 1.4.3, where the functions cryptography_encrypt() and cryptography_decrypt() fail to release allocated memory when receiving non-200 HTTP status codes from the KMC server. This oversight can lead to gradual memory exhaustion through repeated failed requests.

The CVSS score of 6.3 indicates a medium severity level, with a low attack complexity and a network attack vector. The vulnerability impacts availability but does not affect confidentiality or integrity.

Technical Analysis

The root cause of CVE-2026-22025 stems from inadequate memory management practices in the CryptoLib software. The failure to free memory allocated during cryptographic operations leads to potential memory leaks. Attackers may leverage this flaw by sending repeated requests that trigger non-200 HTTP responses, causing the application to exhaust available memory.

The attack vector is network-based, allowing potential attackers to exploit the vulnerability remotely without requiring any user interaction or elevated privileges. The attack complexity is rated as low, making it relatively easy for an attacker to exploit this vulnerability, particularly if they can control the responses from the KMC server.

The impact on availability is classified as low, reflecting the risk of service disruption due to memory exhaustion. However, since confidentiality and integrity are not affected, organizations may initially underestimate the severity of this vulnerability.

Risk & Impact Analysis

The deployment risk associated with CVE-2026-22025 is significant, as organizations using CryptoLib in critical systems may face service disruptions due to memory exhaustion. Given the nature of the vulnerability, an attacker could exploit it by sending crafted HTTP responses, leading to gradual degradation of service and potential denial of service incidents.

Organizations should assess the potential blast radius, especially in systems where CryptoLib is integral to communication security. The risk assessment indicates that remediation should be prioritized based on the CVSS score of 6.3, highlighting the medium urgency for organizations to patch this vulnerability.

Exploitation Status

Affected Versions

CryptoLib versions prior to 1.4.3 are affected by this vulnerability. Organizations should ensure that they upgrade to version 1.4.3 or later to mitigate the risk associated with this memory leak issue.

Mitigation & Remediation

Organizations must patch their systems by upgrading to CryptoLib version 1.4.3 or later, where the memory leak issue has been addressed. If immediate patching is not feasible, organizations should implement workarounds to limit the frequency of requests sent to the KMC server, thus reducing the likelihood of triggering the memory leak. Additionally, configuration hardening and network controls should be enforced to minimize exposure to potential attackers.

Monitoring for unusual memory usage patterns in systems utilizing CryptoLib can also help detect potential exploitation attempts. For further information on security testing and vulnerability management, organizations may consider engaging in penetration testing to identify additional weaknesses.

Detection Guidance

To detect potential exploitation of CVE-2026-22025, organizations should monitor their logs for indicators of unusual HTTP responses, specifically non-200 status codes from the KMC server, as well as any spikes in memory usage. Behavioral anomalies that deviate from normal operational patterns should also be flagged for review.

AppSecure Threat Intelligence Insight

The long-term significance of CVE-2026-22025 reflects a broader trend within software development, where memory management issues can lead to vulnerabilities that may be exploited over time. This incident serves as a reminder for security teams to implement rigorous coding standards and memory management practices to prevent similar vulnerabilities.

Organizations should take this opportunity to assess their software development lifecycle and ensure that security testing is integrated into the process. For further insights on best practices in penetration testing, organizations may refer to the following resources: penetration testing methodology, vulnerability management program design, and API penetration testing strategies.