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    I spent the last couple of days examining the source code and understanding the Copy.Fail vulnerability in detail. This vulnerability happens on the shoulders of 4 key components:- Page cache- AF_ALG- algif_aead- splice()In this video, I talk about these components and demonstrate how the CVE-2026-31431 vulnerability allows attackers to gain root access by modifying the “su” entry in the page cache.https://youtu.be/OftLQ1uPh4M#copyfail #linux #video
  • Ah, the #copyfail clickbait posts are coming.

    Mondo copyfail
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    @blindcoder Yes, it needs local user access. But that could also be tunnelled through an exploitable Wordpress install or other PHP etc stuff. SELinux might already help in that case, but my general rule would be: If the machine is exposed to the internet, deploy the mitigation. For machines that are not open to the internet, like homelabs etc it is an acceptable risk to wait for the updated kernel packages.
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    They: "On a scale from 1 to 10: How lazy are you?"Me: Using the copy fail exploit instead of sudo to avoid having to type my password#copyfail #linux #cybersecurity