In Focus: OpenAI Daybreak

Information in this post reflects publicly available sources as of June 29, 2026. You merge a pull request on a Friday afternoon. It passes review, passes CI, and ships. Three weeks later a security researcher emails to say that exact change introduced a use-after-free that lets an unprivileged user escalate to root. The patch was a two-line diff. Finding it required reading half a million lines of kernel code with the right question in mind. For … Read More