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The Journey of Bypassing Ubuntu's Unprivileged Namespace Restriction

https://u1f383.github.io/linux/2025/06/26/the-journey-of-bypassing-ubuntus-unprivileged-namespace-restriction.html
17•Bogdanp•6h ago

Comments

0xbadcafebee•4h ago
> As a researcher, it was frustrating to see various bypass methods being publicly disclosed while I couldn’t share my own work because I had already reported it to ZDI. After a few days with no updates, I even emailed ZDI to ask if I could withdraw my submission. Fortunately, my boss, Orange Tsai, stepped in just in time and patiently walked me through the pros and cons of doing so. That helped me regain my composure, and I ended up sending another email to retract my withdrawal request.

If you feel emotion when writing an email (or Slack message), put it in draft and look at it tomorrow. I've never not edited or scrapped it the next day.

rexer•1h ago
> I've never not edited or scrapped it the next day.

There's definitely a balance. Showing a little emotion can be a good thing, necessary even

throw290348190•59m ago
> As a researcher, it was frustrating to see various bypass methods being publicly disclosed while I couldn’t share my own work because I had already reported it to ZDI. After a few days with no updates, I even emailed ZDI to ask if I could withdraw my submission

security@$COMPANY.DOMAIN inboxes are constantly inundated with BS security reports phishing for a payout. The situation has only gotten worse with LLMs.

Expecting a quick response is ridiculous. You should try taking on a role where it's your job to sift through all those emails .

Show HN: I'm an airline pilot – I built interactive graphs/globes of my flights

https://jameshard.ing/pilot
1120•jamesharding•15h ago•165 comments

Normalizing Flows Are Capable Generative Models

https://machinelearning.apple.com/research/normalizing-flows
100•danboarder•7h ago•26 comments

Learn OCaml

https://ocaml-sf.org/learn-ocaml-public/#activity=exercises
85•smartmic•7h ago•26 comments

James Webb Space Telescope reveals its first direct image of an exoplanet

https://www.smithsonianmag.com/smart-news/james-webb-space-telescope-reveals-its-first-direct-image-discovery-of-an-exoplanet-180986886/
150•divbzero•10h ago•66 comments

C compiler for Web Assembly (c4wa)

https://github.com/kign/c4wa
19•90s_dev•3d ago•4 comments

SymbolicAI: A neuro-symbolic perspective on LLMs

https://github.com/ExtensityAI/symbolicai
127•futurisold•9h ago•38 comments

A brief history of children sent through the mail (2016)

https://www.smithsonianmag.com/smart-news/brief-history-children-sent-through-mail-180959372/
89•m-hodges•8h ago•80 comments

Reinforcement learning, explained with a minimum of math and jargon

https://www.understandingai.org/p/reinforcement-learning-explained
65•JnBrymn•3d ago•1 comments

Qwen VLo: From "Understanding" the World to "Depicting" It

https://qwenlm.github.io/blog/qwen-vlo/
178•lnyan•13h ago•50 comments

Multi-Stage Programming with Splice Variables

https://tsung-ju.org/icfp25/
21•matt_d•4h ago•2 comments

Facebook is starting to feed its AI with private, unpublished photos

https://www.theverge.com/meta/694685/meta-ai-camera-roll
121•pier25•4h ago•80 comments

Weird Expressions in Rust

https://www.wakunguma.com/blog/rust-weird-expr
145•lukastyrychtr•13h ago•112 comments

Structuring Arrays with Algebraic Shapes

https://dl.acm.org/doi/abs/10.1145/3736112.3736141
70•todsacerdoti•8h ago•5 comments

10 Years of Pomological Watercolors

https://parkerhiggins.net/2025/04/10-years-of-pomological-watercolors/
178•fanf2•13h ago•29 comments

Transmitting data via ultrasound without any special equipment

https://halcy.de/blog/2025/06/27/transmitting-data-via-ultrasound-without-any-special-equipment/
99•todsacerdoti•11h ago•31 comments

nimbme – Nim bare-metal environment

https://github.com/mikra01/nimbme
48•michaelsbradley•9h ago•11 comments

bootc-image-builder: Build your entire OS from a Containerfile

https://github.com/osbuild/bootc-image-builder
35•twelvenmonkeys•3d ago•9 comments

The Original Macintosh: Calculator Construction Set

https://www.folklore.org/Calculator_Construction_Set.html
3•fidotron•2d ago•0 comments

Theoretical Analysis of Positional Encodings in Transformer Models

https://arxiv.org/abs/2506.06398
20•PaulHoule•6h ago•1 comments

Spark AI (YC W24) is hiring a full-stack engineer in SF (founding team)

https://www.ycombinator.com/companies/spark/jobs/kDeJlPK-software-engineer-full-stack-founding-team
1•juliawu•7h ago

New Process Uses Microbes to Create Valuable Materials from Urine

https://newscenter.lbl.gov/2025/06/17/new-process-uses-microbes-to-create-valuable-materials-from-urine/
29•gmays•9h ago•6 comments

Rust in the Linux kernel: part 2

https://lwn.net/SubscriberLink/1025232/fbb2d90d084368e3/
81•chmaynard•6h ago•10 comments

Show HN: Do you know RGB?

https://maxwellito.github.io/do-you-know-rgb/
64•maxwellito•3d ago•47 comments

Does a Focus on Royalty Obscure British History?

https://www.historytoday.com/archive/head-head/does-focus-royalty-obscure-british-history
21•pepys•3d ago•6 comments

The Journey of Bypassing Ubuntu's Unprivileged Namespace Restriction

https://u1f383.github.io/linux/2025/06/26/the-journey-of-bypassing-ubuntus-unprivileged-namespace-restriction.html
17•Bogdanp•6h ago•3 comments

Whitesmiths C compiler: One of the earliest commercial C compilers available

https://github.com/hansake/Whitesmiths-C-compiler
101•todsacerdoti•4d ago•31 comments

Slightly better named character reference tokenization than Chrome, Safari, FF

https://www.ryanliptak.com/blog/better-named-character-reference-tokenization/
51•todsacerdoti•1d ago•8 comments

Glass nanostructures reflect nearly all visible light, challenging assumptions

https://phys.org/news/2025-06-glass-nanostructures-visible-photonics-assumptions.html
32•bookofjoe•3d ago•4 comments

Parameterized types in C using the new tag compatibility rule

https://nullprogram.com/blog/2025/06/26/
133•ingve•22h ago•66 comments

A New Kind of Computer (April 2025)

https://lightmatter.co/blog/a-new-kind-of-computer/
45•gkolli•4d ago•18 comments