CVE-2025-40267
Unknown Unknown - Not Provided
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.
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Meta Information
Published
2025-12-06
Last Modified
2025-12-08
Generated
2026-06-16
AI Q&A
2025-12-07
EPSS Evaluated
2026-06-15
NVD
CVE-2025-40267
EUVD
EUVD-2025-201588
Affected Vendors & Products
Showing 1 associated CPE
Vendor Product Version / Range
linux linux_kernel *
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Exploitability
CWE
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CWE ID Description
CWE-UNKNOWN
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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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