CVE-2026-43366

Descripción

In the Linux kernel, the following vulnerability has been resolved: io_uring/kbuf: check if target buffer list is still legacy on recycle There-s a gap between when the buffer was grabbed and when it potentially gets recycled, where if the list is empty, someone could-ve upgraded it to a ring provided type. This can happen if the request is forced via io-wq. The legacy recycling is missing checking if the buffer_list still exists, and if it-s of the correct type. Add those checks.