CVE-2026-43366 — io_uring/kbuf: check if target buffer list is still legacy on recycle
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…
Published: 2026-05-08 · CVSS: 7.8 · CVSS 3.1
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.
Source: CVE Program · Revision 8b16575c39f1e1810c5e863010da073d2d3285e7