CVE-2026-64066
Received Received - Intake

netfs Read-to-Pagecache Subrequest Failure Handling Fix

Publication date: 2026-07-19

Last updated on: 2026-07-19

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.

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Meta Information

Published
2026-07-19
Last Modified
2026-07-19
Generated
2026-07-20
AI Q&A
2026-07-19
EPSS Evaluated
N/A
NVD
CVE-2026-64066
EUVD
EUVD-2026-45639

Affected Vendors & Products

Showing 1 associated CPE
Vendor Product Version / Range
linux linux_kernel *

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Exploitability

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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 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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