Security Advisory: Linux Kernel Local Privilege Escalation Vulnerability (CVE-2026-31431)

Important Security Notice

Security Advisory: Linux Kernel Local Privilege Escalation Vulnerability (CVE-2026-31431)

Distribute immediately to all Seigler Holdings Partners and Seigler Technologies customers.

Seigler Technologies is aware of and actively responding to the recently disclosed “copy fail” vulnerability (CVE-2026-31431), a local privilege escalation flaw within the Linux Kernel. To ensure the safety of our environment, partners, and customers, we have engaged our all-hands security protocol as of 5:00 pm ET. This means our entire engineering and support teams are working around the clock to address CVE-2026-31431 and maintain the integrity of our infrastructure.

While we have not observed any malicious exploits targeting the Seigler Technologies or Seigler Holdings infrastructure at this time, we are working to ensure all mitigation steps are taken. At the moment, we are reviewing all Linux-based components for potential exposure.

Cloud Hosting Customers: Under the Seigler Technologies Cloud Hosting Security Model, we believe customers are responsible for the security and patching of applications and code within their specific environments. Given the severity of CVE-2026-31431, all Linux-based virtual machines should be considered at risk until patched. While we are working to push updated base images, Seigler Technologies support is available to assist customers with manual patching upon request. Furthermore, we are working to push automated security updates to all cloud hosting environments as quickly as possible to ensure comprehensive protection. Customers who need assistance can start a ticket here: https://support.seigler.us/index.php?a=add&category=8. Please select S1 outage as the ticket priority. Or call Toll Free +1 (844) 734-4537 x1 or +1 (908) 224-5200. We are working to have someone available via our phones and support portal 24/7 this weekend.

We appreciate your partnership. We are working hard to resolve this issue. We will update as soon as information is available. Thank you for your continued trust in Seigler Technologies.