Fix illumos/solaris build [sysctl.h, *time_r signatures] by tstromberg · Pull Request #5972 · rizinorg/rizin

Your checklist for this pull request I've read the guidelines for contributing to this repository. I made sure to follow the project's coding style. I've documented every RZ_API fun...

Antide's Law

Personal blog of Julien (jvoisin) Voisin

2025 Year Summary

An overview of the work done in 2025

ML-KEM Mythbusting

What is this? There have been some recent concerns about ML-KEM, NIST’s standard for encryption with Post-Quantum Cryptography, related standards of the IETF, and lots of conspiracy theories …

Progress Report: Linux 6.17 - Asahi Linux

Modern iOS Security Features -- A Deep Dive into SPTM, TXM, and Exclaves

The XNU kernel is the basis of Apple's operating systems. Although labeled as a hybrid kernel, it is found to generally operate in a monolithic manner by defining a single privileged trust zone in which all system functionality resides. This has security implications, as a kernel compromise has immediate and significant effects on the entire system. Over the past few years, Apple has taken steps towards a more compartmentalized kernel architecture and a more microkernel-like design. To date, there has been no scientific discussion of SPTM and related security mechanisms. Therefore, the understanding of the system and the underlying security mechanisms is minimal. In this paper, we provide a comprehensive analysis of new security mechanisms and their interplay, and create the first conclusive writeup considering all current mitigations. SPTM acts as the sole authority regarding memory retyping. Our analysis reveals that, through SPTM domains based on frame retyping and memory mapping rule sets, SPTM introduces domains of trust into the system, effectively gapping different functionalities from one another. Gapped functionality includes the TXM, responsible for code signing and entitlement verification. We further demonstrate how this introduction lays the groundwork for the most recent security feature of Exclaves, and conduct an in-depth analysis of its communication mechanisms. We discover multifold ways of communication, most notably xnuproxy as a secure world request handler, and the Tightbeam IPC framework. The architecture changes are found to increase system security, with key and sensitive components being moved out of XNU's direct reach. This also provides additional security guarantees in the event of a kernel compromise, which is no longer an immediate threat at the highest trust level.

Shortcut Manager - RSoC Project

Introducing a centralized Shortcut Manager in Cutter for improved consistency and maintainability. Read about the improvements made possible by Emad Sohail, an RSoC student