Linux Kernel up to 6.12.9 netfs state issue

Summaryinfo

A vulnerability was found in Linux Kernel up to 6.12.9. It has been rated as problematic. Affected by this vulnerability is an unknown functionality of the component netfs. Performing a manipulation results in state issue. This vulnerability is reported as CVE-2024-57941. No exploit exists. Upgrading the affected component is advised.

Detailsinfo

A vulnerability was found in Linux Kernel up to 6.12.9. It has been classified as problematic. This affects an unknown function of the component netfs. The manipulation with an unknown input leads to a state issue vulnerability. CWE is classifying the issue as CWE-371. The impact remains unknown. The summary by CVE is:

In the Linux kernel, the following vulnerability has been resolved: netfs: Fix the (non-)cancellation of copy when cache is temporarily disabled When the caching for a cookie is temporarily disabled (e.g. due to a DIO write on that file), future copying to the cache for that file is disabled until all fds open on that file are closed. However, if netfslib is using the deprecated PG_private_2 method (such as is currently used by ceph), and decides it wants to copy to the cache, netfs_advance_write() will just bail at the first check seeing that the cache stream is unavailable, and indicate that it dealt with all the content. This means that we have no subrequests to provide notifications to drive the state machine or even to pin the request and the request just gets discarded, leaving the folios with PG_private_2 set. Fix this by jumping directly to cancel the request if the cache is not available. That way, we don't remove mark3 from the folio_queue list and netfs_pgpriv2_cancel() will clean up the folios. This was found by running the generic/013 xfstest against ceph with an active cache and the "-o fsc" option passed to ceph. That would usually hang

The advisory is shared at git.kernel.org. This vulnerability is uniquely identified as CVE-2024-57941 since 01/19/2025. Neither technical details nor an exploit are publicly available. The price for an exploit might be around USD $0-$5k at the moment (estimation calculated on 02/17/2026).

The vulnerability scanner Nessus provides a plugin with the ID 276749 (AlmaLinux 10 : kernel (ALSA-2025:20095)), which helps to determine the existence of the flaw in a target environment.

Upgrading to version 6.12.10 eliminates this vulnerability. Applying the patch ba37bdfe59fb43e80dd79290340a21864ba4b61e/d0327c824338cdccad058723a31d038ecd553409 is able to eliminate this problem. The bugfix is ready for download at git.kernel.org. The best possible mitigation is suggested to be upgrading to the latest version.

The vulnerability is also documented in the databases at Tenable (276749) and CERT Bund (WID-SEC-2025-0155). If you want to get the best quality for vulnerability data then you always have to consider VulDB.

Affected

• Debian Linux
• Amazon Linux 2
• Red Hat Enterprise Linux
• Ubuntu Linux
• SUSE Linux
• Oracle Linux
• RESF Rocky Linux
• Dell NetWorker
• Dell Avamar
• Dell PowerProtect Data Domain
• Open Source Linux Kernel
• Dell Secure Connect Gateway

Productinfo

Type

• Operating System

Vendor

• Linux

Name

• Kernel

Version

• 6.12.0
• 6.12.1
• 6.12.2
• 6.12.3
• 6.12.4
• 6.12.5
• 6.12.6
• 6.12.7
• 6.12.8
• 6.12.9

License

• open-source

Website

• Vendor: https://www.kernel.org/

CPE 2.3info

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CPE 2.2info

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Entryinfo

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