linux: In the Linux kernel, the following vulnerability has been resolved: io_uring: fix regbuf vector size truncation The...
CVE-2025-40291 is fixed in linux on 1 platform by DEBIAN-CVE-2025-40291 (version 6.17.8-1), released December 8, 2025. It is not reported as exploited. Patch Radar priority: High.
In the Linux kernel, the following vulnerability has been resolved: io_uring: fix regbuf vector size truncation There is a report of io_estimate_bvec_size() truncating the calculated number of segments that leads to corruption issues. Check it doesn't overflow "int"s used later. Rough but simple, can be improved on top.
Where it's fixed
| Product | Fixed in | Fix | Released |
|---|---|---|---|
| Linux | |||
| linux · Debian 14 | 6.17.8-1 | DEBIAN-CVE-2025-40291 | Dec 8, 2025 |
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