CVE-2021-47040: io_uring: fix overflows checks in provide buffers
First published: Wed Feb 28 2024(Updated: )
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.
Credit: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
| Affected Software | Affected Version | How to fix |
|---|---|---|
| Linux Kernel | >=5.8<5.10.37 | |
| Linux Kernel | >=5.11<5.11.21 | |
| Linux Kernel | >=5.12<5.12.4 |
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