CVE-2025-40291
Unknown Unknown - Not Provided

BaseFortify

Publication date: 2025-12-08

Last updated on: 2025-12-08

Assigner: kernel.org

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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Meta Information

Published
2025-12-08
Last Modified
2025-12-08
Generated
2026-07-06
AI Q&A
2025-12-08
EPSS Evaluated
2026-07-05
NVD
CVE-2025-40291
EUVD
EUVD-2025-201653

Affected Vendors & Products

Showing 1 associated CPE
Vendor Product Version / Range
linux linux_kernel *

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CWE ID Description
CWE-UNKNOWN

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Executive Summary

This vulnerability involves the Linux kernel's io_uring subsystem, where the function io_estimate_bvec_size() incorrectly truncates the calculated number of segments. This truncation can lead to corruption issues because it may cause an overflow in the integer values used later in the process.

Impact Analysis

The vulnerability can lead to data corruption within the Linux kernel's io_uring subsystem, potentially affecting system stability and data integrity when using io_uring for asynchronous I/O operations.

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