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Siemens SIPLUS and SIMATIC Products
View CSAF Summary Multiple Siemens products are vulnerable to the "Copy Fail" vulnerability. Siemens has released new versions for several affected products and recommends to update to the latest versions. Siemens is preparing further fix versions and recommends specific countermeasures for products where fixes are not, or not yet available. The following versions of Siemens SIPLUS and SIMATIC Products are affected: • SIMATIC AX Runtime Core Linux Common Debian vers:all/* (CVE-2026-31431) • SIMATIC AX Runtime Core Linux Common Debian arm64 vers:all/* (CVE-2026-31431) • SIMATIC AX Runtime Core Linux Platform Container Common Debian Development vers:all/* (CVE-2026-31431) • SIMATIC AX Runtime Core Linux VMWare Development vers:all/* (CVE-2026-31431) • SIMATIC CN 4100 vers:intdot/ CVSS Vendor Equipment
From Exploit Code to Production Detection: Building a CVE-2026-31431 (Copy Fail) detection with Agents
CVE-2026-31431 (Copy Fail) lets any unprivileged user corrupt the Linux page cache via AF_ALG sockets to escalate privileges. This post covers the exploit mechanics and how Datadog Security Research used coding agents to ship a detection content pack in a single session.
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