CVE-2026-64066

Analyzed Analyzed - Analysis Complete

netfs Read-to-Pagecache Subrequest Failure Handling Fix

Publication date: 2026-07-19

Last updated on: 2026-09-03

Assigner: kernel.org

Description

In the Linux kernel, the following vulnerability has been resolved: netfs: Fix netfs_read_to_pagecache() to pause on subreq failure Fix netfs_read_to_pagecache() so that it pauses the generation of new subrequests if an already-issued subrequest fails.

CVSS Scores

EPSS Scores

Probability:
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Meta Information

Published

2026-07-19

Last Modified

2026-09-03

Generated

2026-09-18

AI Q&A

2026-07-19

EPSS Evaluated

2026-09-15

NVD

CVE-2026-64066

EUVD

EUVD-2026-45639

Affected Vendors & Products

Vendor	Product	Version / Range
linux	linux_kernel	7.1
linux	linux_kernel	7.1
linux	linux_kernel	7.1
linux	linux_kernel	7.1
linux	linux_kernel	From 6.19 (inc) to 7.0.11 (exc)
linux	linux_kernel	From 6.12 (inc) to 6.18.34 (exc)

Helpful Resources

Exploitability

CWE

KEV

CWE ID	Description
CWE-125	The product reads data past the end, or before the beginning, of the intended buffer.

Attack-Flow Graph

Executive Summary

This vulnerability in the Linux kernel involves a flaw in the netfs_read_to_pagecache() function. The issue is that it does not properly pause generating new subrequests when an existing subrequest fails. This could lead to continued processing despite errors, potentially causing system instability or unexpected behavior.

Detection Guidance

This vulnerability is specific to the Linux kernel's netfs subsystem and may not have direct network detection methods. Check kernel logs for errors related to netfs_read_to_pagecache() or subrequest failures using commands like dmesg | grep netfs or journalctl -k | grep netfs.

Impact Analysis

The impact depends on how the affected kernel is used. If exploited, it might cause system crashes, data corruption, or performance degradation during file operations. Users relying on network or filesystem operations could experience disruptions.

Compliance Impact

This vulnerability affects the Linux kernel's netfs subsystem, specifically a failure in netfs_read_to_pagecache() to pause subrequest generation after a subrequest fails. This could lead to data corruption or improper handling of data reads, potentially impacting data integrity and availability. However, the provided context does not detail specific compliance impacts on standards like GDPR or HIPAA.

Mitigation Strategies

Update your Linux kernel to the latest stable version that includes the fix for this vulnerability. Monitor kernel logs for any related errors after applying the update.

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