linux: In the Linux kernel, the following vulnerability has been resolved: io_uring: fix overflows checks in provide buffer...
CVE-2021-47040 is fixed in linux on 1 platform, first by DEBIAN-CVE-2021-47040, released February 28, 2024. It is not reported as exploited. Patch Radar priority: High.
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.
Where it's fixed
| Product | Fixed in | Fix | Released |
|---|---|---|---|
| Linux | |||
| linux · Debian 12.15 (bookworm) | 5.10.38-1 | DEBIAN-CVE-2021-47040 | Feb 28, 2024 |
| linux · Debian 13.5 (trixie) | 5.10.38-1 | DEBIAN-CVE-2021-47040 | Feb 28, 2024 |
| linux · Debian 14 | 5.10.38-1 | DEBIAN-CVE-2021-47040 | Feb 28, 2024 |
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