CVE-2026-31431: Linux Kernel crypto algif_aead improper memory handling

CVE-2026-31431 · Severity: critical · CVSS 7.8 · Exploited in the wild · Published 2026-04-22

ABB Ability Edgenius is an edge computing platform used in critical infrastructure (manufacturing, energy, water, chemical) to collect operational data and host real-time analytics. A Linux kernel flaw in the cryptographic subsystem allows authenticated local users or compromised container workloads to escalate privileges to root, gaining complete system control and enabling arbitrary code execution or denial of service on affected nodes.

Technologies: Amazon AWS, Linux Kernel, Siemens SIMATIC CN 4100. Vendors: ABB, Amazon, Linux, Siemens.

Quick answers

Is CVE-2026-31431 exploited in the wild?
Yes. CVE-2026-31431 is known to be exploited in the wild, first recorded on 1 May 2026. Treat it as urgent.
How severe is CVE-2026-31431?
Critical severity, with a CVSS score of 7.8, published 22 April 2026.
Which products and versions are affected?
ABB Ability Edgenius >=3.2.0.0 to <3.2.4.1; Amazon Linux 4.14, 5.4, 5.10, 5.15, 6.1, 6.12, 6.18; Linux Kernel All versions prior to the fix in April 2026; Siemens SIMATIC AX Runtime Core all/*; and 13 more.
Is there a fix for CVE-2026-31431?
A patch was published on 2026-09-17: Fix available in Edgenius 3.2.4.1 Junglewise finds every place you run it, drafts the upgrade and applies it once you approve.
How is CVE-2026-31431 attacked?
It is attacked with local access.
Am I affected by CVE-2026-31431?
Check whether you run ABB Ability Edgenius, Amazon Linux, Amazon AWS or one of the others listed at an affected version. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.

Technical details

CVE-2026-31431 is a privilege escalation vulnerability in the Linux kernel's algif_aead cryptographic algorithm interface, where an incorrect in-place operation was introduced with mismatched source and destination data mappings. The flaw exists in the kernel's cryptographic subsystem and affects most major Linux distributions released since 2017. An attacker with local code execution (either a local user or a compromised container workload) can invoke the vulnerable cryptographic interface to trigger incorrect memory handling, allowing escalation from normal user privileges to root (administrative) access. No remote exploitation is possible; local access (physical or via SSH credentials) is required. The vulnerability has been publicly disclosed. ABB released a fix in Edgenius version 3.2.4.1, which incorporates the Linux kernel security update. Mitigation includes limiting SSH and Cockpit access and noting that no additional lower-privilege users exist by default on Edgenius installations.

Affected products

  • ABB Ability Edgenius >=3.2.0.0 to <3.2.4.1

Timeline

  • 2026-09-17: disclosed: CVE-2026-31431 publicly disclosed
  • 2026-09-17: patched: Fix available in Edgenius 3.2.4.1
  • 2026-09-17: advisory: CISA ICS Advisory ICSA-26-260-06 published

References

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