The PDF ("sec23summer...") has metadata creation/modification timestamp of 20221004165319Z (October 2022). So presumably the paper was written last October and released for Usenix 2023.
(Reference [12] is from Usenix July 2022. See "Prior work" in the introduction).
(Reference [12] is from Usenix July 2022. See "Prior work" in the introduction).