BaseFortify

Publication date: 2025-12-06

Last updated on: 2025-12-08

Assigner: kernel.org

Description

In the Linux kernel, the following vulnerability has been resolved: io_uring/rw: ensure allocated iovec gets cleared for early failure A previous commit reused the recyling infrastructure for early cleanup, but this is not enough for the case where our internal caches have overflowed. If this happens, then the allocated iovec can get leaked if the request is also aborted early. Reinstate the previous forced free of the iovec for that situation.

CVSS Scores

EPSS Scores

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Meta Information

Published

2025-12-06

Last Modified

2025-12-08

Generated

2026-07-07

AI Q&A

2025-12-07

EPSS Evaluated

2026-07-06

NVD

CVE-2025-40267

EUVD

EUVD-2025-201588

Affected Vendors & Products

Vendor	Product	Version / Range
linux	linux_kernel	*

Helpful Resources

Exploitability

CWE

KEV

CWE ID	Description
CWE-UNKNOWN

Attack-Flow Graph

Executive Summary

This vulnerability in the Linux kernel's io_uring subsystem involves improper handling of allocated iovec structures during early failure scenarios. Specifically, when internal caches overflow and a request is aborted early, the allocated iovec may not be properly cleared or freed, leading to a potential memory leak. The fix reinstates forced freeing of the iovec in such cases to prevent this leak.

Impact Analysis

The vulnerability can lead to memory leaks in the Linux kernel when certain io_uring requests fail early and internal caches overflow. This could potentially degrade system performance or stability over time due to resource exhaustion.

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