CVE-2026-22790 is a high-severity vulnerability impacting the EVerest EV charging software stack. This vulnerability allows for remote code execution due to a flaw in the `HomeplugMessage::setup_payload` function. Specifically, prior to version 2026.02.0, the function improperly trusts the length of SLAC payloads after an assertion check, which is removed in release builds. Oversized payloads can be injected, leading to a stack buffer overflow of approximately 1497 bytes.
The CVSS score for this vulnerability is 8.8, categorizing it as high severity. It is crucial for organizations utilizing EVerest to understand the implications of this vulnerability, as it poses a significant risk of remote code execution from network-provided frames. The urgency for patching is elevated, given the potential impact on confidentiality, integrity, and availability.
Organizations should prioritize patching immediately, as version 2026.02.0 includes a fix for this vulnerability. Failure to address this issue could result in unauthorized access to critical systems.
Currently, there are no known exploits or public proof of concepts associated with CVE-2026-22790. However, the nature of the vulnerability suggests that it could be leveraged in an attack scenario, hence the importance of immediate remediation.
Vulnerability Details
The vulnerability is classified under CWE-121, indicating an improper control of a resource through its lifetime. The affected product is the EVerest software stack, developed by the Linux Foundation. The vulnerability was published on March 26, 2026, highlighting the critical need for affected users to upgrade to version 2026.02.0 or later.
Technical Analysis
The root cause of CVE-2026-22790 lies in the handling of SLAC payload lengths within the `HomeplugMessage::setup_payload` function. The function's reliance on an assertion check, which is removed in release builds, leads to an unsafe condition where oversized payloads can overwrite adjacent memory in the stack. This flaw allows attackers to exploit the stack corruption for arbitrary code execution.
The attack vector is classified as Adjacent Network, indicating that an attacker could exploit this vulnerability through network access. The attack complexity is low, requiring no special privileges or user interaction, making it accessible for a range of potential attackers. The consequences of exploitation could significantly compromise the confidentiality, integrity, and availability of the affected systems.
Risk & Impact Analysis
Risk to organizations includes unauthorized remote code execution, potentially leading to full system compromise. Given the nature of EVerest's use in EV charging infrastructure, the blast radius of this vulnerability could extend to critical public safety systems, making this a high-priority issue. The urgency for organizations to address this vulnerability is underscored by its high CVSS score of 8.8, indicating significant potential impact.
Organizations should address this vulnerability in their priority patch cycle to mitigate risks effectively. Continuous monitoring for any signs of exploitation attempts should also be implemented as part of a robust security posture.
Exploitation Status
Signal | Status |
|---|---|
Known Exploit | No |
Public PoC | No |
Actively Exploited | No |
Ransomware Use | No |
Affected Versions
The affected versions of the EVerest software include all versions prior to 2026.02.0. Users are strongly encouraged to upgrade to the latest version to mitigate the risk associated with this vulnerability.
Mitigation & Remediation
Organizations should implement the following mitigation strategies to address CVE-2026-22790: apply the patch provided in version 2026.02.0, review system configurations, and ensure that any unnecessary services are disabled. It is also vital to conduct a thorough security assessment after applying the patch.
For further guidance on conducting comprehensive security assessments, organizations may consult resources on application security assessments to ensure robust defenses.
Detection Guidance
Monitoring for unusual behaviors, such as unexpected memory usage spikes or unauthorized access attempts, is critical for detecting potential exploitation of this vulnerability. Additionally, logging network traffic for anomalies can provide insights into attempted attacks.
AppSecure Threat Intelligence Insight
Long-term significance of this vulnerability lies in its representation of the potential risks associated with trusting input lengths without adequate validation. This highlights the critical need for robust security practices in software development, particularly in systems interacting with external inputs.
Security teams should take note of the trends this vulnerability indicates, especially in industries where software interfaces with external systems such as EV charging infrastructure. Adopting secure coding practices and robust validation methods can significantly mitigate such risks in the future.
For further reading on securing systems against similar vulnerabilities, organizations can refer to resources on penetration testing methodologies and vulnerability management program design to enhance overall security.
In conclusion, addressing the vulnerabilities in software systems is not just a priority but a necessity to ensure the security of critical infrastructure. Organizations must remain proactive in their approach to security.
Disclaimer: This content was generated using AI. While we strive for accuracy, please verify critical information with official sources.
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