Things I build, break, fix, and write about

4 November 2026
Linux kernel net/sched UAF constraints on CentOS 9 desktop

Linux kernel net/sched use-after-free looks messy on paper, and on CentOS 9 Desktop it is worse, because the obvious paths are blocked and the useful ones are just awkward enough to miss. I would not trust a “safe” desktop until I had checked the filters, namespaces, and modules properly.

4 November 2026
AI-assisted pull requests raise review cost

AI-assisted pull requests look cheap until you try to review them properly. I’ve seen tidy code hide a lot of work, and the cost only goes up when a...

4 November 2026
Security Advisory – 04 Nov 2026

Daily security advisory summary for 04 Nov 2026

3 November 2026
ionCube Loader: offline PHP bytecode decryption

ionCube Loader is not magic, just a native PHP extension with a very hard boundary. Once you trace the entrypoint and the key derivation properly, the...

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