Original Article Summary

View CSAF Summary ABB is aware of public reports of a vulnerability CVE‑2026‑31431 (Copy Fail) in the product versions listed as affected in the advisory. An update is available that resolves a publicly reported vulnerability. CVE‑2026‑31431 (Copy Fail) is a Linux kernel vulnerability that may allow a locally authenticated user or compromised container workload to gain elevated (root) privileges on affected systems. Once root access is obtained, the attacker can effectively gain complete control of the system The following versions of ABB Ability Edgenius are affected: Ability Edgenius >=3.2.0.0|=3.2.0.0|<3.2.4.1 installed on ABB Ability Edgenius Gateway - bE100 Product Status: fixed, known_affected Remediations Vendor fix The problem is corrected in the following product versions: - Edgenius 3.2.4.1 ABB recommends that customers apply the update at earliest convenience. Mitigation Mitigating factors describe conditions and circumstances that make an attack that exploits the vulnerability difficult or less likely to succeed. Refer to section General security recommendations for further advise on how to keep your system secure. Recommended mitigation factors - Limit access to ssh or cockpit - By default, no additional lower privilege users are present on Edgenius installations. Mitigation For more information see the associated ABB PSIRT security advisory 7PAA024620 ABB CYBERSECURITY ADVISORY - PDF Version , ABB CYBERSECURITY ADVISORY - CSAF Version . Relevant CWE: CWE-669 Incorrect Resource Transfer Between Spheres Metrics CVSS Version Base Score Base Severity Vector String 3.1 7.8 HIGH CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H Acknowledgments ABB PSIRT reported this vulnerability to CISA. Notice The information in this document is subject to change without notice, and should not be construed as a commitment by ABB. ABB provides no warranty, express or implied, including warranties of merchantability and fitness for a particular purpose, for the information contained in this document, and assumes no responsibility for any errors that may appear in this document. In no event shall ABB or any of its suppliers be liable for direct, indirect, special, incidental or consequential damages of any nature or kind arising from the use of this document, or from the use of any hardware or software described in this document, even if ABB or its suppliers have been advised of the possibility of such damages. This document and parts hereof must not be reproduced or copied without written permission from ABB, and the contents hereof must not be imparted to a third party nor used for any unauthorized purpose. All rights to registrations and trademarks reside with their respective owners. Frequently Asked Questions What causes the vulnerability? - A flaw was found in the Linux kernel's algif_aead cryptographic algorithm interface. An incorrect 'in-place operation' was introduced, where the source and destination data mappings were different. This could lead to unexpected behavior or data integrity issues during cryptographic operations, potentially impacting the reliability of encrypted communications. What is Edgenius? - ABB Ability™ Edgenius is an edge computing platform that - Connects to control systems, devices, and equipment - Collects and contextualizes operational data - Hosts applications that deliver real-time insights and AI-driven recommendations What might an attacker use the vulnerability to do? - Successful exploitation could enable a local user attacker to gain administrative control of the system node, execute arbitrary code, or cause the node to become unavailable. How could an attacker exploit the vulnerability? - An attacker could exploit this vulnerability after obtaining local access to the system. By invoking the Linux kernel’s affected cryptographic interface (algif_aead), the attacker can trigger incorrect memory handling in the kernel. This allows the attacker to escalate privileges from a normal user to full administrative (root) access on the affected system node Could the vulnerability be exploited remotely? - No, to exploit this vulnerability an attacker would need to have local access (physical access or through valid SSH credentials) to an affected system node. What does the update do? - The update resolves the issue by incorporating the security update of the Linux kernel. When this security advisory was issued, had this vulnerability been publicly disclosed? - Yes, this vulnerability has been publicly disclosed. When this security advisory was issued, had ABB received any reports that this vulnerability was being exploited? - No, ABB had not received any information indicating that this vulnerability had been exploited for Edgenius when this security advisory was originally issued. Legal Notice and Terms of Use This product is provided subject to this Notification (https://www.cisa.gov/notification) and this Privacy & Use policy (https://www.cisa.gov/privacy-policy). Recommended Practices CISA recommends users take defensive measures to minimize the exploitation risk of these vulnerabilities. Minimize network exposure for all control system devices and/or systems, and ensure they are not accessible from the internet. Locate control system networks and remote devices behind firewalls and isolate them from business networks. When remote access is required, use more secure methods, such as Virtual Private Networks (VPNs), recognizing VPNs may have vulnerabilities and should be updated to the most recent version available. Also recognize VPN is only as secure as its connected devices. CISA reminds organizations to perform proper impact analysis and risk assessment prior to deploying defensive measures. CISA also provides a section for control systems security recommended practices on the ICS webpage on cisa.gov. Several CISA products detailing cyber defense best practices are available for reading and download, including Improving Industrial Control Systems Cybersecurity with Defense-in-Depth Strategies. CISA encourages organizations to implement recommended cybersecurity strategies for proactive defense of ICS assets. Additional mitigation guidance and recommended practices are publicly available on the ICS webpage at cisa.gov in the technical information paper, ICS-TIP-12-146-01B--Targeted Cyber Intrusion Detection and Mitigation Strategies. Organizations observing suspected malicious activity should follow established internal procedures and report findings to CISA for tracking and correlation against other incidents. Advisory Conversion Disclaimer This ICSA is a verbatim republication of ABB PSIRT 7PAA024620 from a direct conversion of the vendor's Common Security Advisory Framework (CSAF) advisory. This is republished to CISA's website as a means of increasing visibility and is provided "as-is" for informational purposes only. CISA is not responsible for the editorial or technical accuracy of republished advisories and provides no warranties of any kind regarding any information contained within this advisory. Further, CISA does not endorse any commercial product or service. Please contact ABB PSIRT directly for any questions regarding this advisory. Revision History Initial Release Date: 2026-06-25 Date Revision Summary 2026-06-25 1 Initial version. 2026-09-17 2 Initial CISA Republication of ABB PSIRT 7PAA024620 advisory Legal Notice and Terms of Use