CVE-2026-64068

Modified Modified - Updated After Analysis

Fix missing locking in Linux kernel netfs retry operations

Publication date: 2026-07-19

Last updated on: 2026-09-07

Assigner: kernel.org

Description

In the Linux kernel, the following vulnerability has been resolved: netfs: Fix missing locking around retry adding new subreqs Fix netfs_retry_read_subrequests() and netfs_retry_write_stream() to take the appropriate lock when adding extra subrequests into stream->subrequests.

CVSS Scores

EPSS Scores

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Meta Information

Published

2026-07-19

Last Modified

2026-09-07

Generated

2026-09-19

AI Q&A

2026-07-19

EPSS Evaluated

2026-09-15

NVD

CVE-2026-64068

EUVD

EUVD-2026-45641

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 6.10 (inc) to 7.0.11 (exc)

Helpful Resources

Exploitability

CWE

KEV

CWE ID	Description
CWE-667	The product does not properly acquire or release a lock on a resource, leading to unexpected resource state changes and behaviors.

Attack-Flow Graph

Executive Summary

This vulnerability in the Linux kernel involves a missing lock when adding new subrequests during read or write operations in the netfs subsystem. The functions netfs_retry_read_subrequests() and netfs_retry_write_stream() fail to properly lock the stream->subrequests list, which could lead to race conditions or data corruption.

Detection Guidance

This vulnerability is specific to the Linux kernel's netfs subsystem and involves missing locking around retry operations for read/write subrequests. Detection requires checking kernel logs for related errors or kernel crashes during file operations. Commands like dmesg, journalctl -k, or checking system logs for netfs-related errors may help identify issues.

Impact Analysis

This flaw may cause system instability, crashes, or data corruption during file operations. Attackers could exploit it to trigger unexpected behavior or denial of service in systems using the affected Linux kernel components.

Compliance Impact

This vulnerability is a Linux kernel issue related to missing locking in network filesystem operations. It does not directly impact compliance with standards like GDPR or HIPAA as it is a low-level system bug without documented data exposure or privacy implications.

Mitigation Strategies

Apply the latest Linux kernel patches or updates that address this specific vulnerability. Monitor vendor advisories for kernel updates and ensure your system is running a patched version of the kernel.

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