https://www.msbiro.net/tags/runtime-security/ Recent content in Runtime-Security on Cloud Native & Open Source: A Team Lead’s Working Journal https://www.msbiro.net/%3Clink%20or%20path%20of%20image%20for%20opengraph,%20twitter-cards%3E https://www.msbiro.net/%3Clink%20or%20path%20of%20image%20for%20opengraph,%20twitter-cards%3E Hugo -- 0.160.1 en-us Fri, 01 May 2026 09:00:00 +0100 https://www.msbiro.net/posts/cve-2026-31431-copy-fail-linux-kernel-privilege-escalation/ Fri, 01 May 2026 09:00:00 +0100 https://www.msbiro.net/posts/cve-2026-31431-copy-fail-linux-kernel-privilege-escalation/ CVE-2026-31431 Copy Fail is a local privilege escalation in the Linux kernel exploitable with a 732-byte Python script. This post covers what it is, how to fix it, what to do when patching isn't immediate, and why runtime detection is the control that actually matters.