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Xint
Company blog · xint.io/blogsecurityai
Xint is the company blog at xint.io, writing about security and ai. Since 2026, 13 different Hacker News readers have linked it 14 times, most often “Copy Fail: 732 Bytes to Root on Every Major Linux Distribution”. It is still writing: the last post was on 2026-11-02, and you can follow it by feed.
Too few sampled comments (7) to say how often HN recommends it.?
Why HN links it
HN readers link xint.io for its technical writeup of the Copy Fail Linux privilege escalation bug (CVE-2026-31431), which commenters say gives more exploit detail than the submitted link.
Summarised by Claude from a sample of 7 HN comments that link here. Each comment is marked recommending, critical or neutral (citing without judging); how this works.
Xint catches real, exploitable vulnerabilities in your code and live applications, not theoretical risks. Find out what an attacker would find first.
Most-linked posts?
- Copy Fail: 732 Bytes to Root on Every Major Linux Distribution9 people · 10 mentions · first linked 2026-04-29
- CopyFail: From Pod to Host2 people · 2 mentions · first linked 2026-05-19
What Hacker News says?
Yes, strongly agree. This is HUGE news, I would have skimmed over "Copy Fail". The blog post might be a better place to link to also, it has more details on the exploit. https://xint.io/blog/copy-fail-linux-distributions There are also some good threads on which distros are vulnerable and mitigations on the github page. https://github.com/theori-io/copy-fail-CVE-2026-31431/issues
Comment linking /blog/copy-fail-linux-distributions
on “Copy Fail – CVE-2026-31431”Submitted Copy Fail: 732 Bytes to Root on Every Major Linux Distribution as a story · 15 points
HN discussionFor this crowd, I highly suggest checking out the technical writeup https://xint.io/blog/copy-fail-linux-distributions
Comment linking /blog/copy-fail-linux-distributions
on “Copy Fail – CVE-2026-31431”Submitted Copy Fail: 732 Bytes to Root on Every Major Linux Distributions as a story · 2 points
HN discussionI recommend reading the technical writeup https://xint.io/blog/copy-fail-linux-distributions
Comment linking /blog/copy-fail-linux-distributions
on “Copy Fail – CVE-2026-31431”Submitted Xint Pulse: On-Demand Web App Penetration Tests as a story · 1 points
HN discussionIt's an advertisement for their tool that found the exploit: https://copy.fail/#contact , https://xint.io/products/xint-code
Comment linking /products/xint-code
on “Copy Fail – CVE-2026-31431”Submitted CopyFail: From Pod to Host as a story · 1 points
HN discussionBetter explanation of the write up (still from original exploit author) : https://xint.io/blog/copy-fail-linux-distributions
Comment linking /blog/copy-fail-linux-distributions
on “Copy Fail – CVE-2026-31431”Submitted Copy Fail: 732 Bytes to Root on Every Major Linux Distribution as a story · 1 points
HN discussionGood but not necessarily better that was is already pay-as-you-go available today. ref. https://www.flyingpenguin.com/the-boy-that-cried-mythos-veri... This AISLE benchmark is interesting in this matter: https://aisle.com/blog/ai-cybersecurity-after-mythos-the-jag... And the recently discovered Copy Fail by Xint code is another proof that the gating is overblown: https://xint.io/blog/copy-fail-linux-distributions
Comment linking /blog/copy-fail-linux-distributions
on “After dissing Anthropic for limiting Mythos, OpenAI restricts access to Cyber”No, they did not. Careful of falling for the psychosis. > This finding was AI-assisted, but began with an insight from Theori researcher Taeyang Lee, who was studying how the Linux crypto subsystem interacts with page-cache-backed data. https://xint.io/blog/copy-fail-linux-distributions
Comment linking /blog/copy-fail-linux-distributions
on “Dirtyfrag: Universal Linux LPE”True, but security breach inside a sandbox/container can cause serious damage too(stealing your keys, spreading via your code/release etc). And containers aren't for security anyway(e.g. Copy Fail breaching to host https://xint.io/blog/copy-fail-pod-to-host )
Comment linking /blog/copy-fail-pod-to-host
on “1-Click GitHub Token Stealing via a VSCode Bug”What's the context here? Edit: https://xint.io/blog/copy-fail-linux-distributions
Comment linking /blog/copy-fail-linux-distributions
on “You made me rich, thank you”
