CVE-2026-64058
Received Received - Intake

netfs: Fix Read Folio Writeback Handling in Linux Kernel

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_folio() to wait on writeback Fix netfs_read_folio() to wait for an ongoing writeback to complete so that it can trust the dirty flag and whatever is attached to folio->private (folio->private may get cleaned up by the collector before it clears the writeback flag).

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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-2026-64058
EUVD
EUVD-2026-45631

Affected Vendors & Products

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

Helpful Resources

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 involves a flaw in the netfs_read_folio() function. It fails to wait for ongoing writeback operations to complete before checking the dirty flag or accessing folio->private. This could lead to race conditions where data is incorrectly handled or lost during concurrent read and write operations.

Detection Guidance

This vulnerability is specific to the Linux kernel and does not have direct network detection methods. You can check your kernel version using uname -a and compare it against patched versions. Look for kernel logs indicating issues with netfs or writeback processes.

Impact Analysis

This vulnerability may cause data corruption or loss in filesystems using the netfs subsystem. Users could experience crashes, incorrect file contents, or system instability if the kernel mishandles concurrent read/write operations due to the race condition.

Compliance Impact

This vulnerability does not directly affect compliance with GDPR, HIPAA, or other standards as it is a Linux kernel issue related to file system operations and does not involve data breaches or unauthorized access.

Mitigation Strategies

Update your Linux kernel to the latest stable version that includes the fix for CVE-2026-64058. Monitor kernel logs for netfs-related errors and ensure writeback processes complete properly.

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