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.

CVSS Scores

EPSS Scores

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Meta Information

Published

2025-12-16

Last Modified

2025-12-18

Generated

2026-07-06

AI Q&A

2025-12-16

EPSS Evaluated

2026-07-05

NVD

CVE-2025-68317

Affected Vendors & Products

Currently, no data is known.

Helpful Resources

Exploitability

CWE

KEV

CWE ID	Description
CWE-UNKNOWN

Attack-Flow Graph

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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