
Besides a handful of clarifications and other minor fixes to the Vulkan documentation, Vulkan 1.4.314 introduces VK_KHR_robustness2 as a promotion of the existing VK_EXT_robustness2 extension. The Git commit for Vulkan 1.4.314 lays it out clearly that VK_KHR_robustness2 is "for Roadmap 2026."

The Vulkan Roadmap Milestones are described as " intended to be supported by mid-to-high-end smartphones, tablets, laptops, consoles, and desktop devices. Each milestone indicates support for a set of extensions, features, limits, and formats across these devices, and should be supported by all such new hardware shipping by the end of the target year or shortly thereafter. "
There is also a prior slide for Vulkan Roadmap for those forgetting Vulkan's "roadmap" approach:

Now it looks like Vulkan Roadmap 2026 will be succeeding Vulkan Roadmap 2024.
From the roadmap perspective, VK_KHR_robustness2 isn't particularly exciting but just adds stricter requirements for out-of-bounds reads/writes and other requirements. NVIDIA engineers worked on this spec release.
More details on Vulkan 1.4.314 for those interested can be found via GitHub .