CVE-2025-40291

high

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.

References

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

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

Details

Source: Mitre, NVD

Published: 2025-12-08

Updated: 2025-12-08

Risk Information

CVSS v2

Base Score: 6.6

Vector: CVSS2#AV:L/AC:L/Au:N/C:N/I:C/A:C

Severity: Medium

CVSS v3

Base Score: 7.8

Vector: CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

Severity: High

EPSS

EPSS: 0.00018