ABB Ability Edgenius
CISA's ABB advisory covers CVE-2026-31431, a public Linux kernel flaw letting local users or compromised containers gain root on Ability Edgenius gateways.
ABB confirmed that CVE-2026-31431 (Copy Fail), a Linux kernel flaw in the algif_aead cryptographic interface (CWE-669), affects Ability Edgenius versions 3.2.0.0 to below 3.2.4.1 on bE100 gateways. A locally authenticated user or compromised container workload can gain root privileges, enabling arbitrary code execution or denial of service on the node. CVSS v3.1 score is 7.8, and the flaw impacts kernels shipped in most major Linux distributions since 2017. A fix is available and ABB reported no exploitation of Edgenius when the advisory was issued.
- CVE-2026-31431 is a Linux kernel algif_aead flaw enabling local root privilege escalation
- Affects Ability Edgenius 3.2.0.0 to below 3.2.4.1 on bE100 gateways
- Root access enables arbitrary code execution or node unavailability
- Underlying kernel flaw impacts most major distributions released since 2017
- Fix available; no Edgenius exploitation reported at advisory issuance
Vulnerabilities mentionedAll →
| CVE | Vulnerability | CVSS | EPSS | Flags | Affected | Exposure | Published |
|---|---|---|---|---|---|---|---|
| CVE-2026-31431 | Local Privilege Escalation (Copy Fail) in Linux Kernel algif_aead Interface CVE-2026-31431 ('Copy Fail') is an incorrect resource transfer between spheres (CWE-669/CWE-1288) in the Linux kernel's algif_aead implementation of the AF_ALG userspace crypto interface, introduced roughly nine years ago (around 2017, per public reporting) when commit 72548b093ee3 switched AEAD operations to in-place handling even though the source and destination buffers come from different mappings. A local, unprivileged user can trigger the flaw by performing AEAD operations through the AF_ALG socket interface, causing the kernel to mishandle the copy of ciphertext and associated data. Successful exploitation provides a reliable local privilege escalation to root (C:H/I:H/A:H per the CVSS vector). Nearly every major Linux distribution and enterprise platform is exposed, including the kernel itself, Red Hat Enterprise Linux (including AUS, EUS, TUS and Update Services for SAP Solutions), OpenShift Container Platform, Amazon Linux, Ubuntu, Debian, openSUSE Leap, SUSE CaaS Platform, NixOS, and Linux-based products from Arista and Siemens. The flaw has public proof-of-concept code, a 99.9% EPSS score, and was added to CISA's Known Exploited Vulnerabilities catalog on 2026-05-01, indicating exploitation in the wild (ransomware use is unknown). Do: Patch by installing the kernel update for CVE-2026-31431 through your distribution's security channel (Red Hat Enterprise Linux including AUS/EUS/TUS/SAP channels, OpenShift, Amazon Linux, Ubuntu, Debian, openSUSE Leap, SUSE CaaS Platform, NixOS, and Arista/Siemens firmware/software as applicable) and reboot into the patched kernel; the data provides no fixed version numbers, so defer to vendor advisories. Because the flaw is in CISA's KEV catalog (added 2026-05-01) with a 99.9% EPSS score, prioritize internet-reachable and multi-user systems first and follow BOD 22-01 guidance for cloud services. Check running kernel versions ('uname -r') and distribution advisory status to confirm you are on a fixed build. | 7.8 | 100% | KEV PoC ×5 |
| masshundreds of millions to billions of installations (servers, cloud instances, desktops, and Android/embedded devices running affected kernel generations) |
Full article1,071 words · extracted from cisa.gov · click to collapse
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|<3.2.4.1, 3.2.4.1 (CVE-2026-31431)
| CVSS | Vendor | Equipment | Vulnerabilities |
|---|---|---|---|
| v3 7.8 | ABB | ABB Ability Edgenius | Incorrect Resource Transfer Between Spheres |
Background
- Critical Infrastructure Sectors: Critical Manufacturing, Energy, Water and Wastewater, Chemical
- Countries/Areas Deployed: Worldwide
- Company Headquarters Location: Switzerland
Vulnerabilities
CVE-2026-31431
A Linux kernel vulnerability that may allow a locally authenticated user or compromised container workload to gain elevated (root) privileges on affected systems. The issue originates in the Linux kernel’s cryptographic subsystem and impacts kernels used by most major Linux distributions released since 2017.Successful exploitation requires local code execution, however, in shared, containerized, or multi‑tenant environments this may increase the security risk.
Affected Products
ABB Ability Edgenius
Vendor:
ABB
Product Version:
ABB Ability Edgenius >=3.2.0.0|<3.2.4.1 installed on ABB Ability Edgenius Gateway - bE100
Product Status:
fixed, known_affected
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
Text extracted automatically; images, tables and formatting may be missing. Original: https://www.cisa.gov/news-events/ics-advisories/icsa-26-260-06