Released October 20, 2026, OpenBSD 8.0 marks the 61st release in the series, credited to Theo de Raadt. This version introduces significant platform-specific improvements, including a major expansion of the amd64 kernel virtual address space from 4G to 512G, with pmap(9) direct mapping now randomized for enhanced security. ARM64 gains hibernate support and accelerated swap encryption via AES CPU instructions, while RISC-V64 adds support for the 'V' vector extension, Advanced Interrupt Architecture, and Sstc timer extension. SPARC64 switches to the LLVM toolchain with improved memory alignment. Loongson support is retired due to Clang 22 incompatibility. Kernel enhancements include fixes to memory size calculation, semaphore handling during context switches, and improved inactive page queue heuristics. Suspend/resume functionality is expanded with support for qwz(4), ufshci(4) on select laptops, and qcuart(4), alongside a global sleep mode variable to differentiate hibernate from normal suspend. Graphics drivers see DRM updated to Linux 6.18.53, adding Intel Arc A-Series graphics support and increased VRAM mapping on amd64. VMM/VMD now supports up to 64 VCPUs per guest. Cryptographic keys for base, firmware, packages, and syspatch are provided for verification.
FAQ Q: What are the key security and performance improvements in OpenBSD 8.0?
FAQ A: OpenBSD 8.0 enhances security through randomized pmap(9) direct mapping and improved memory handling, while boosting performance via AES-accelerated swap encryption on ARM64 and RISC-V64, expanded kernel address space on amd64, and optimized page queue heuristics. Suspend/resume reliability is also improved across multiple hardware platforms.
Source: Hacker News · Résumé par HeadlinesBriefing