Unrated severityNVD Advisory· Published Dec 8, 2025· Updated Apr 15, 2026
CVE-2025-40291
CVE-2025-40291
Description
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.
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Affected products
2Patches
Vulnerability mechanics
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