CVE-2025-40291

Published: Dec 8, 2025

Modified: May 11, 2026

PUBLISHED

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.

Vendor	Product	Versions
Linux	Linux	affected `9ef4cbbcb4ac3786a1a4164507511b76b2a572c5 - < 826ce37a842633efe1bb763e4b13045d74060d72` affected `9ef4cbbcb4ac3786a1a4164507511b76b2a572c5 - < 146eb58629f45f8297e83d69e64d4eea4b28d972`
Linux	Linux	affected `6.15` unaffected `0 - < 6.15` unaffected `6.17.8 - <= 6.17.` unaffected `6.18 - <= `

References

https://git.kernel.org/stable/c/826ce37a842633efe1bb763e4b13045d74060d72

https://git.kernel.org/stable/c/146eb58629f45f8297e83d69e64d4eea4b28d972

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CVE-2025-40291

Description

Affected Products

References