CVE-2026-64058

Modified Modified - Updated After Analysis

netfs: Fix Read Folio Writeback Handling in Linux Kernel

Publication date: 2026-07-19

Last updated on: 2026-09-14

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).

CVSS Scores

EPSS Scores

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Meta Information

Published

2026-07-19

Last Modified

2026-09-14

Generated

2026-09-18

AI Q&A

2026-07-19

EPSS Evaluated

2026-09-15

NVD

CVE-2026-64058

EUVD

EUVD-2026-45631

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_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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