CVE-2025-68317
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BaseFortify

Publication date: 2025-12-16

Last updated on: 2025-12-18

Assigner: kernel.org

Description
In the Linux kernel, the following vulnerability has been resolved: io_uring/zctx: check chained notif contexts Send zc only links ubuf_info for requests coming from the same context. There are some ambiguous syz reports, so let's check the assumption on notification completion.
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Meta Information
Published
2025-12-16
Last Modified
2025-12-18
Generated
2026-06-16
AI Q&A
2025-12-16
EPSS Evaluated
2026-06-15
NVD
CVE-2025-68317
Affected Vendors & Products
Currently, no data is known.
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Exploitability
CWE
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KEV
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CWE ID Description
CWE-UNKNOWN
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Executive Summary

This vulnerability in the Linux kernel relates to the io_uring subsystem, specifically the zctx (zero-copy context) notification handling. It involves ensuring that only linked ubuf_info structures for requests originating from the same context are sent, addressing ambiguous reports related to notification completion. Essentially, it fixes an issue where notification contexts were not properly checked, which could lead to incorrect handling of notifications.

Impact Analysis

The vulnerability could potentially cause incorrect notification handling in the Linux kernel's io_uring subsystem, which might lead to unexpected behavior or errors in applications relying on this feature. However, specific impacts such as data loss, system crashes, or security breaches are not detailed in the provided information.

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