CVE-2021-47040 — io_uring: fix overflows checks in provide buffers
In the Linux kernel, the following vulnerability has been resolved: io_uring: fix overflows checks in provide buffers Colin reported before possible overflow and sign extensio…
Published: 2024-02-28 · CVSS: 7.8 · CVSS 3.1
In the Linux kernel, the following vulnerability has been resolved: io_uring: fix overflows checks in provide buffers Colin reported before possible overflow and sign extension problems in io_provide_buffers_prep(). As Linus pointed out previous attempt did nothing useful, see d81269fecb8ce ("io_uring: fix provide_buffers sign extension"). Do that with help of check_<op>_overflow helpers. And fix struct io_provide_buf::len type, as it doesn't make much sense to keep it signed.
Source: CVE Program · Revision 8b16575c39f1e1810c5e863010da073d2d3285e7