VDB-341069 · CVE-2025-71106 · WID-SEC-2026-0119

Linux Kernel up to 6.18.2 fs filesystems_freeze_callback denial of service

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5.5	$0-$5k	0.00

Summaryinfo

A vulnerability, which was classified as critical, has been found in Linux Kernel up to 6.18.2. This vulnerability affects the function filesystems_freeze_callback of the component fs. The manipulation leads to denial of service. This vulnerability is traded as CVE-2025-71106. There is no exploit available. It is advisable to upgrade the affected component.

Detailsinfo

A vulnerability was found in Linux Kernel up to 6.18.2 and classified as critical. This issue affects the function filesystems_freeze_callback of the component fs. The manipulation with an unknown input leads to a denial of service vulnerability. Using CWE to declare the problem leads to CWE-404. The product does not release or incorrectly releases a resource before it is made available for re-use. Impacted is availability. The summary by CVE is:

In the Linux kernel, the following vulnerability has been resolved: fs: PM: Fix reverse check in filesystems_freeze_callback() The freeze_all_ptr check in filesystems_freeze_callback() introduced by commit a3f8f8662771 ("power: always freeze efivarfs") is reverse which quite confusingly causes all file systems to be frozen when filesystem_freeze_enabled is false. On my systems it causes the WARN_ON_ONCE() in __set_task_frozen() to trigger, most likely due to an attempt to freeze a file system that is not ready for that. Add a logical negation to the check in question to reverse it as appropriate.

The advisory is shared at git.kernel.org. The identification of this vulnerability is CVE-2025-71106 since 01/13/2026. Technical details are known, but no exploit is available.

Upgrading to version 6.18.3 or 6.19-rc1 eliminates this vulnerability. Applying the patch b107196729ff6b9d6cde0a71f49c1243def43328/222047f68e8565c558728f792f6fef152a1d4d51 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 vulnerability database at CERT Bund (WID-SEC-2026-0119). If you want to get the best quality for vulnerability data then you always have to consider VulDB.

Affected

Debian Linux
Amazon Linux 2
SUSE Linux
Oracle Linux
SUSE openSUSE
Open Source Linux Kernel

Productinfo

Type

Operating System

Vendor

Linux

Name

Kernel

Version

License

open-source

Website

Vendor: https://www.kernel.org/

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔒
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 5.6
VulDB Meta Temp Score: 5.5

VulDB Base Score: 5.7
VulDB Temp Score: 5.5
VulDB Vector: 🔒
VulDB Reliability: 🔍

NVD Base Score: 5.5
NVD Vector: 🔒

CVSSv2info

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💳	💳	💳	💳	💳	💳
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Vector	Complexity	Authentication	Confidentiality	Integrity	Availability
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VulDB Base Score: 🔒
VulDB Temp Score: 🔒
VulDB Reliability: 🔍

Exploitinginfo

Class: Denial of service
CWE: CWE-404
CAPEC: 🔒
ATT&CK: 🔒

Physical: Partially
Local: Yes
Remote: Partially

Availability: 🔒
Status: Not defined

EPSS Score: 🔒
EPSS Percentile: 🔒

Price Prediction: 🔍
Current Price Estimation: 🔒

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Threat Intelligenceinfo

Interest: 🔍
Active Actors: 🔍
Active APT Groups: 🔍

Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

0-Day Time: 🔒

Upgrade: Kernel 6.18.3/6.19-rc1
Patch: b107196729ff6b9d6cde0a71f49c1243def43328/222047f68e8565c558728f792f6fef152a1d4d51

Timelineinfo

01/13/2026 CVE reserved
01/14/2026 +1 days Advisory disclosed
01/14/2026 +0 days VulDB entry created
03/31/2026 +76 days VulDB entry last update

Sourcesinfo

Vendor: kernel.org

Advisory: git.kernel.org
Status: Confirmed

CVE: CVE-2025-71106 (🔒)
GCVE (CVE): GCVE-0-2025-71106
GCVE (VulDB): GCVE-100-341069
CERT Bund: WID-SEC-2026-0119 - Linux Kernel: Mehrere Schwachstellen

Entryinfo

Created: 01/14/2026 17:26
Updated: 03/31/2026 19:44
Changes: 01/14/2026 17:26 (59), 01/16/2026 01:57 (7), 03/09/2026 04:05 (1), 03/25/2026 21:51 (10), 03/31/2026 19:44 (1)
Complete: 🔍
Cache ID: 216:F1F:103

If you want to get the best quality for vulnerability data then you always have to consider VulDB.