OpenBSD 8.0 Released

OpenBSD 8.0, the 61st release of the security-focused Unix-like operating system, has been released with significant virtualization and hardware upgrades, marking a major milestone for the security-conscious platform. Key enhancements include support for up to 64 virtual CPUs per virtual machine, Intel Arc graphics, ARM64 hibernation, and expanded RISC-V support.

Several critical fixes have been implemented to improve compatibility with 32-bit Linux guests, while changes to virtual machine ownership management and interrupt emulation have bolstered the virtualization infrastructure's capabilities. The graphics stack has also been upgraded, with DRM drivers updated to those from the Linux kernel 6.18.53. A standout addition in OpenBSD 8.0 is support for Intel Arc A-Series (Alchemist) graphics cards via the inteldrm driver.

Another substantial change is the expansion of the amd64 kernel's virtual address space from a 4 GB limit to 512 GB, enabling the system to map over 4 GB of video memory. This improvement addresses GPU timeout issues experienced on some Intel Alder Lake systems.

Security enhancements abound in OpenBSD 8.0, with checks and fixes introduced across the kernel and system utilities. These include strengthened pledge and unveil mechanisms, more rigorous validation of executable files, and security measures against memory corruption and information disclosure. The full list of changes is available for those interested in delving deeper into the updates.