Hi everyone,
I’m currently working on detection use cases for CVE-2026-31431 (“CopyFail”) on Linux systems and wanted to check with the community:
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Has anyone already developed or deployed reliable detection rules (SIEM/EDR) for this vulnerability?
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If so, are you focusing more on syscall-level telemetry (e.g.,
splice,AF_ALG) or post-exploitation behavior (like privilege escalation patterns)? -
Have you seen any low-noise indicators that work well in production?
Additionally, does anyone know if Rapid7 is planning to release official detection content (InsightIDR / Threat Command / etc.) for CopyFail? Any rough timeline would be helpful.
Appreciate any insights or shared experiences—especially from those who have tested detections against real PoCs.
Thanks!
